Exemplo n.º 1
0
def run_training():
    with tf.Graph().as_default():
        images, labels = inputs(train=True,
                                batch_size=FLAGS.batch_size,
                                num_epochs=FLAGS.num_epochs)
        logits = mnist.inference(images, FLAGS.hidden1, FLAGS.hidden2)
        loss = mnist.loss(logits, labels)
        train_op = mnist.training(loss, FLAGS.learning_rate)
        init_op = tf.group(tf.global_variables_initializer(),
                           tf.local_variables_initializer())
        sess = tf.Session()
        sess.run(init_op)
        coord = tf.train.Coordinator()
        threads = tf.train.start_queue_runners(sess=sess, coord=coord)
        try:
            step = 0
            while not coord.should_stop():
                start_time = time.time()
                _, loss_value = sess.run([train_op, loss])
                duration = time.time() - start_time
                if step % 100 == 0:
                    print('Step %d: loss = %.2f (%.3f sec)' %
                          (step, loss_value, duration))
                    step += 1
        except tf.errors.OutOfRangeError:
            print('Done training for %d epochs, %d steps.' %
                  (FLAGS.num_epochs, step))
        finally:
            coord.request_stop()
            coord.join(threads)
            sess.close()
Exemplo n.º 2
0
def run_training():
    """Train MNIST for a number of steps."""
    data_sets = input_data.read_data_sets(FLAGS.train_dir, FLAGS.fake_data)

    with tf.Graph().as_default():
        images_placeholder, labels_placeholder = placeholder_inputs(FLAGS.batch_size)
        logits = mnist.inference(images_placeholder, FLAGS.hidden1, FLAGS.hidden2)
        loss = mnist.calculate_loss(logits, labels_placeholder)
        train_op = mnist.training(loss, FLAGS.learning_rate)
        eval_correct = mnist.evaluation(logits, labels_placeholder)
        summary_op = tf.merge_all_summaries()  # Collect all summaries generated by the default graph
        saver = tf.train.Saver()  # Create a saver for writing training checkpoints.

        sess = tf.Session()
        init = tf.initialize_all_variables()
        sess.run(init)
        # Instantiate a SummaryWriter to output summaries and the Graph.
        summary_writer = tf.train.SummaryWriter(FLAGS.train_dir,
                                                graph_def=sess.graph_def)
        # Training loop
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()
            # Fill a feed dictionary with the actual set of images and labels
            # for this particular training step.
            feed_dict = fill_feed_dict(data_sets.train,
                                       images_placeholder,
                                       labels_placeholder)
            # Run one step of the model.  The return values are the activations
            # from the `train_op` (which is discarded) and the `loss` Op.
            _, loss_value = sess.run([train_op, loss],
                                     feed_dict=feed_dict)
            duration = time.time() - start_time
            # Write the summaries and print an overview fairly often.
            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
                # Update the events file.
                summary_str = sess.run(summary_op, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
            # Save a checkpoint and evaluate the model periodically.
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                saver.save(sess, FLAGS.train_dir, global_step=step)
                print('Training Data Evaluation:')
                do_eval(sess,
                        eval_correct,
                        images_placeholder,
                        labels_placeholder,
                        data_sets.train)

                print('Validation Data Evaluation:')
                do_eval(sess,
                        eval_correct,
                        images_placeholder,
                        labels_placeholder,
                        data_sets.validation)
                print('Test Data Evaluation:')
                do_eval(sess,
                        eval_correct,
                        images_placeholder,
                        labels_placeholder,
                        data_sets.test)
def run_training():
  data_sets = data_mnist.read_data_sets()
  with tf.Graph().as_default():
    images_placeholder, labels_placeholder = placeholder_inputs(FLAGS.batch_size)
    logits = mnist.inference(images_placeholder, FLAGS.hidden1, FLAGS.hidden2)
    loss = mnist.loss(logits, labels_placeholder)
    train_op = mnist.training(loss, FLAGS.learning_rate)
    eval_correct = mnist.evaluation(logits, labels_placeholder)

    summary_op = tf.merge_all_summaries()
    saver = tf.train.Saver()
    
    sess = tf.Session()
    sess.run(tf.initialize_all_variables())
    summary_writer = tf.train.SummaryWriter(FLAGS.train_dir, sess.graph)

    # Start the training loop.
    for step in xrange(FLAGS.max_steps):
      start_time = time.time()
      feed_dict = fill_feed_dict(data_sets.train, images_placeholder, labels_placeholder)
      _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
      duration = time.time() - start_time

      if step % 100 == 0:
        print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
        summary_str = sess.run(summary_op, feed_dict=feed_dict)
        summary_writer.add_summary(summary_str, step)
        summary_writer.flush()

      if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
        checkpoint_file = os.path.join(FLAGS.train_dir, 'checkpoint')
        saver.save(sess, checkpoint_file, global_step=step)
        do_eval(sess,eval_correct, images_placeholder, labels_placeholder, data_sets.train)
        do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.validation)
        do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.test)
def run_training():
    data_sets = input_data.read_data_sets(FLAGS.input_data_dir,
                                          FLAGS.fake_data)

    with tf.Graph().as_default():
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)
        logits = mnist.inference(images_placeholder, FLAGS.hidden1,
                                 FLAGS.hidden2)
        loss = mnist.loss(logits, labels_placeholder)
        train_op = mnist.training(loss, FLAGS.learning_rate)
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # Build the summary tensor based on the TF collection of Summaries
        summary = tf.summary.merge_all()

        init = tf.global_variables_initializer()

        # Create a saver for writing training checkpoints
        saver = tf.train.Saver()

        sess = tf.Session()

        # Instantiate a SummaryWriter to output summries and the Graph
        summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)

        sess.run(init)

        for step in xrange(FLAGS.max_steps):
            start_time = time.time()
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            duration = time.time() - start_time

            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                # Update the events file
                summary_str = sess.run(summary, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            # Save a checkpoint and evaluate the model periodically.
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)
                # Evaluate against the training set.
                print('Training Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.train)
                # Evaluate against the validation set.
                print('Validation Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.validation)
                # Evaluate aginst the test set.
                print('Test Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.test)
def run_training():
    data_sets = input_data.read_data_sets(fake_data)

    with tf.Graph().as_default():
        image_placeholder, label_placeholder = placeholder_inputs(batch_size)

        logits = mnist.inference(image_placeholder, hidden1_unit, hidden2_unit)
        #计算损失
        loss = mnist.loss(logits, label_placeholder)
        #训练
        train_op = mnist.training(loss, 0.01)
        #计算正确分类数
        eval_correct = mnist.evaluation(logits, label_placeholder)
        #合并默认图中的所有summaries操作
        summary_op = tf.merge_all_summaries()
        #用于保存网络中的变量
        saver = tf.train.Saver()

        sess = tf.Session()
        #初始化所有变量
        sess.run(tf.initialize_all_variables())

        summary_writter = tf.train.SummaryWriter(train_dir, sess.graph)

        for step in xrange(max_steps):
            start_time = time.time()
            #获取feed_dict字典
            feed_dict = fill_placeholder(data_sets.train, image_placeholder,
                                         label_placeholder)

            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

            duration = time.time() - start_time

            if step % 100 == 0:
                print(
                    'Step %d:loss=%.2f (%.3f sec) %(step,loss_value,duration)')
                summary_str = sess.run(summary_op, feed_dict=feed_dict)
                summary_writter.add_summary(summary_str, step)
                summary_writter.flush()

            if step % 1000 == 0:
                saver.save(sess, train_dir, global_step=step)

                print('Training Data Eval:')
                do_eval(sess, eval_correct, image_placeholder,
                        label_placeholder, data_sets.train)

                print("Validation Data Eval")
                do_eval(sess, eval_correct, image_placeholder,
                        label_placeholder, data_sets.validation)

                print("Test Data Eval:")
                do_eval(sess, eval_correct, image_placeholder,
                        label_placeholder, data_sets.test)
Exemplo n.º 6
0
def run_training():
    """Train MNIST for a number of steps."""
    data_sets = input_data.read_data_sets(FLAGS.train_dir, FLAGS.fake_data)

    with tf.Graph().as_default():
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)
        logits = mnist.inference(images_placeholder, FLAGS.hidden1,
                                 FLAGS.hidden2)
        loss = mnist.calculate_loss(logits, labels_placeholder)
        train_op = mnist.training(loss, FLAGS.learning_rate)
        eval_correct = mnist.evaluation(logits, labels_placeholder)
        summary_op = tf.merge_all_summaries(
        )  # Collect all summaries generated by the default graph
        saver = tf.train.Saver(
        )  # Create a saver for writing training checkpoints.

        sess = tf.Session()
        init = tf.initialize_all_variables()
        sess.run(init)
        # Instantiate a SummaryWriter to output summaries and the Graph.
        summary_writer = tf.train.SummaryWriter(FLAGS.train_dir,
                                                graph_def=sess.graph_def)
        # Training loop
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()
            # Fill a feed dictionary with the actual set of images and labels
            # for this particular training step.
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)
            # Run one step of the model.  The return values are the activations
            # from the `train_op` (which is discarded) and the `loss` Op.
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            duration = time.time() - start_time
            # Write the summaries and print an overview fairly often.
            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                # Update the events file.
                summary_str = sess.run(summary_op, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
            # Save a checkpoint and evaluate the model periodically.
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                saver.save(sess, FLAGS.train_dir, global_step=step)
                print('Training Data Evaluation:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.train)

                print('Validation Data Evaluation:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.validation)
                print('Test Data Evaluation:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.test)
Exemplo n.º 7
0
def run_training():
    data_sets = input_data.read_data_sets('MNIST_data', FLAGS.fake_data)

    with tf.Graph().as_default():
        image_placeholder, label_placeholder = placeholder_inputs(FLAGS.batch_size)

        logits = mnist.inference(image_placeholder, FLAGS.hidden1_unit, FLAGS.hidden2_unit)

        loss = mnist.loss(logits, label_placeholder)

        train_op = mnist.training(loss, FLAGS.learning_rate)

        eval_correct = mnist.evaluation(logits, label_placeholder)

        summary_op = tf.summary.merge_all()

        saver = tf.train.Saver()

        sess = tf.Session()

        sess.run(tf.global_variables_initializer())

        summary_writer = tf.summary.FileWriter(FLAGS.train_dir, sess.graph)

        for step in range(FLAGS.max_steps):
            start_time = time.time()

            feed_dict = fill_placeholder(data_sets.train, image_placeholder, label_placeholder)

            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

            duration = time.time() - start_time

            if step % 100 == 0 :
                print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))

                summary_str = sess.run(summary_op, feed_dict = feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            if step % 1000 == 0:
                saver.save(sess, FLAGS.train_dir, global_step=step)

                print('Training Data Eval: ')
                do_eval(sess, eval_correct, image_placeholder, label_placeholder, data_sets.train)

                print('Validation Data Eval: ')
                do_eval(sess, eval_correct, image_placeholder, label_placeholder, data_sets.validation)

                print('Test Data Eval:')
                do_eval(sess, eval_correct, image_placeholder, label_placeholder, data_sets.test)
Exemplo n.º 8
0
def run_training():
    data_sets = input_data.read_data_sets(FLAGS.input_data_dir, FLAGS.fake_data)
    with tf.Graph().as_default():
        images_placeholder, labels_placeholder = placeholder_inputs(FLAGS.batch_size)
        logits = mnist.inference(images_placeholder, FLAGS.hidden1, FLAGS.hidden2)  # 模型的部分

        loss = mnist.loss(logits, labels_placeholder)

        train_op = mnist.training(loss, FLAGS.learning_rate)

        eval_correct = mnist.evaluation(logits, labels_placeholder)

        summary = tf.summary.merge_all()

        init = tf.global_variables_initializer()

        saver = tf.train.Saver()

        sess = tf.Session()

        summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)

        sess.run(init)

        for step in xrange(FLAGS.max_steps):
            start_time = time.time()
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder, labels_placeholder)
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

            duration = time.time() - start_time

            if step % 100 == 0:
                print 'Setp %d:loss =%.2f (%.3f sec)' % (step, loss_value, duration)
                summary_str = sess.run(summary, feed_dict=feed_dict)

                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)

                print('Training Data Eval:')
                do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.train)

                print "Validation Data Eval:"
                do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.validation)

                print "Test Data Eval:"
                do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.test)
Exemplo n.º 9
0
def run_training():
    data_sets = input_data.read_data_sets(FLAGS.input_data_dir,
                                          FLAGS.fake_data)
    with tf.Graph().as_default():
        # 初始化输入占位符
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)
        # 构建神经网络
        logits = mnist.inference(images_placeholder, FLAGS.hidden1,
                                 FLAGS.hidden2)
        # 添加损失函数
        loss = mnist.loss(logits, labels_placeholder)
        # 训练
        train_op = mnist.training(loss, FLAGS.learning_rate)
        # 正确率计算
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        init = tf.global_variables_initializer()
        sess = tf.Session()
        sess.run(init)

        start_time = time.time()

        for step in range(FLAGS.max_steps):

            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            if step % 100 == 0:
                duration = time.time() - start_time
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                start_time = time.time()

            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                print('Training Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.train)
                print('Validation Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.validation)
                print('Test Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.test)

    print(FLAGS)
def run_training():
    with tf.Graph().as_default():
        # 输入images和labels
        images, labels = inputs(train=True,
                                batch_size=FLAGS.batch_size,
                                num_epochs=FLAGS.num_epochs)
        # 构建一个从推理模型来预测数据的图
        logits = mnist.inference(images, FLAGS.hidden1, FLAGS.hidden2)
        loss = mnist.loss(logits, labels)  # 定义损失函数

        # Add to the Graph operations that train the model.
        train_op = mnist.training(loss, FLAGS.learning_rate)

        # 初始化参数,string_input_producer内部创建了一个epoch计数变量,
        # 归入tf.GraphKeys.LOCAL_VARIABLES集合中,必须单独用initialize_local_variable()初始化
        init_op = tf.group(tf.global_variables_initializer(),
                           tf.local_variables_initializer())

        sess = tf.Session()
        sess.run(init_op)

        # Start input enqueue threads
        coord = tf.train.Coordinator()
        threads = tf.train.start_queue_runners(sess=sess, coord=coord)

        try:
            step = 0
            while not coord.should_stop():  # 进入死循环
                start_time = time.time()
                _, loss_value = sess.run([train_op, loss])
            duration = time.time() - start_time

            # 每100次训练输出一次结果
            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
            step += 1
        except tf.errors.OutOfRangeError:
            print('Done training for %d epochs, %d steps.' %
                  (FLAGS.num_epochs, step))
        finally:
            coord.request_stop()  # 通知其他线程关闭

        coord.join(threads)
        sess.close()
Exemplo n.º 11
0
def run_training():
    data_sets = input_data.read_data_sets(data_dir)
    with tf.Graph().as_default():
        input_holder, label_holder = generate_placeholder(50, input_size)
        logits = mnist.inference(input_holder, input_size, 128, 32,
                                 label_classes)
        loss = mnist.loss(logits, label_holder)
        train_op = mnist.training(loss, 0.01)
        eval_correct = mnist.evaluation(logits, label_holder)
        summary = tf.summary.merge_all()

        init = tf.global_variables_initializer()
        saver = tf.train.Saver()
        sess = tf.Session()
        summary_writer = tf.summary.FileWriter(log_dir, sess.graph)

        sess.run(init)
        for step in range(2000):
            start_time = time.time()
            feed_dict = fill_feed_dict(data_sets.train, input_holder,
                                       label_holder, 50)
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            duration = time.time() - start_time

            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                summary_str = sess.run(summary, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            if (step + 1) % 1000 == 0 or (step + 1) == 2000:
                checkpoint_file = os.path.join(log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)
                print('Training Data Eval:')
                do_eval(sess, eval_correct, input_holder, label_holder,
                        data_sets.train, 50)
                print('Validation Data Eval:')
                do_eval(sess, eval_correct, input_holder, label_holder,
                        data_sets.validation, 50)
                print('Test Data Eval:')
                do_eval(sess, eval_correct, input_holder, label_holder,
                        data_sets.test, 50)
Exemplo n.º 12
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def run_training():
    data_sets = data_mnist.read_data_sets()
    with tf.Graph().as_default():
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)
        logits = mnist.inference(images_placeholder, FLAGS.hidden1,
                                 FLAGS.hidden2)
        loss = mnist.loss(logits, labels_placeholder)
        train_op = mnist.training(loss, FLAGS.learning_rate)
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        summary_op = tf.merge_all_summaries()
        saver = tf.train.Saver()

        sess = tf.Session()
        sess.run(tf.initialize_all_variables())
        summary_writer = tf.train.SummaryWriter(FLAGS.train_dir, sess.graph)

        # Start the training loop.
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            duration = time.time() - start_time

            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                summary_str = sess.run(summary_op, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.train_dir, 'checkpoint')
                saver.save(sess, checkpoint_file, global_step=step)
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.train)
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.validation)
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.test)
Exemplo n.º 13
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def run_training():
    data_sets = read_data_sets('/tmp/tensorflow/mnist/input_data', False)
    with tf.Graph().as_default():

        images_placeholder, labels_placeholder = placeholder_inputs(
            100)  # 每100张送进去计算一次所以这里的向量维度100

        logits = mnist.inference(images_placeholder, 128, 32)

        loss = mnist.loss(logits, labels_placeholder)

        train_op = mnist.training(loss, 0.01)

        summary = tf.summary.merge_all()

        saver = tf.train.Saver()

        init = tf.global_variables_initializer()  #前面都是定义变量,这里对该图中的变量进行初始化

        sess = tf.Session()

        summary_writer = tf.summary.FileWriter("logs/", sess.graph)

        sess.run(init)

        for step in xrange(2000):  # 每一步取100张,一共2000部,取20万张

            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)

            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            #sess.run()函数对loss进行计算,得到lossValue用于查看拟合度是否上身,主要的计算在于执行train_op,返回值_表示匿名,既不关心(应为train_op只是一个计算过程,所以没有返回实体,所以打印并没有区别)
            if step % 100 == 0:
                print(loss_value)
                summary_str = sess.run(summary, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            #    print(train_op)
        save_path = saver.save(sess, "myMnistNet/save_net.ckpt")
        print(save_path)
Exemplo n.º 14
0
def mnist_training():
    x = tf.placeholder(tf.float32,
                       shape=[None, IMG_SIZE * IMG_SIZE],
                       name='x_ph')
    y_ = tf.placeholder(tf.float32, shape=[None, NUM_CLASSES], name='y_ph')

    logits = mnist.inference(x)
    loss = mnist.loss(logits, y_)
    train_op = mnist.training(loss, LR)
    eval_correct = mnist.evaluation(logits, y_)
    summary = tf.summary.merge_all()

    init = tf.global_variables_initializer()
    saver = tf.train.Saver(max_to_keep=cfg.MNIST.RUN.models_to_save)
    sess = tf.Session()

    # Instantiate a SummaryWriter to output summaries and the Graph.
    #summary_writer = tf.summary.FileWriter(, sess.graph)

    sess.run(init)
    print "*****TRAINING STARTED*******"
    for i in range(MAX_ITER):
        if i % 100 == 0 and i > 0:
            print('Step %d: loss = %.2f' % (i, loss_val))
            #targets=sess.run(tf.cast(mnist_db.test.labels,tf.int32))
            #prediction=sess.run(eval_correct,feed_dict={x:mnist_db.test.images,y_:targets})
            #print('Step %d: loss = %.2f, accuracy %.4f' % (i, loss_val,prediction))
            saver.save(sess,
                       os.path.join(cfg.MNIST.RUN.models_dir, 'model'),
                       global_step=i)
        batch = mnist_db.train.next_batch(BATCH_SIZE)
        _, loss_val = sess.run([train_op, loss],
                               feed_dict={
                                   x: batch[0],
                                   y_: batch[1]
                               })
    saver.save(
        sess,
        os.path.join(cfg.MNIST.RUN.models_dir, cfg.MNIST.RUN.last_model_name))
Exemplo n.º 15
0
def run_training():
    """
    Train MNIST for a number of steps
    """

    data_sets = input_data.read_data_sets(FLAGS.train_dir, FLAGS.fake_data)

    with tf.Graph().as_default():
        images_placeholder, labels_placeholder = placeholder_inputs(FLAGS.batch_size)
        logits = mnist.inference(
            images_placeholder,
            FLAGS.hidden1,
            FLAGS.hidden2
        )
        loss = mnist.loss(logits, labels_placeholder)
        train_op = mnist.training(loss, FLAGS.learning_rate)
        eval_correct = mnist.evaluation(logits, labels_placeholder)
        
        summary_op = tf.merge_all_summaries()

        saver = tf.train.Saver()

        sess = tf.Session()

        init = tf.initialize_all_variables()
        sess.run(init)

        summary_writer = tf.training.summary_io.SummaryWriter(
            FLAGS.train_dir,
            graph_def = sess.graph_def
        )

        for step in xrange(FLAGS.max_steps):
            start_time = time.time()

            feed_dict = fill_feed_dict(
                data_sets.train,
                images_placeholder,
                labels_placeholder
            )

            _, loss_value = sess.run([train_op, loss], feed_dict = feed_dict)

            duration = time.time() - start_time

            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
                summary_str = sess.run(summary_op, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)

            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                saver.save(sess, FLAGS.train_dir, global_step = step)

                print('Evaluating on training data...')
                do_eval(
                    sess,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.train
                )

                print('Evaluating on validation data...')
                do_eval(
                    sess,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.validation
                )

                print('Evaluating on test data...')
                do_eval(
                    sess,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.test
                )
Exemplo n.º 16
0
def run_training():
  """Train MNIST for a number of steps."""
  # Get the sets of images and labels for training, validation, and
  # test on MNIST.
  data_sets = input_data.read_data_sets(FLAGS.train_dir, FLAGS.fake_data)
  # Tell TensorFlow that the model will be built into the default Graph.
  with tf.Graph().as_default():
    # Generate placeholders for the images and labels.
    images_placeholder, labels_placeholder = placeholder_inputs(
        FLAGS.batch_size)
    # Build a Graph that computes predictions from the inference model.
    logits = mnist.inference(images_placeholder,
                             FLAGS.hidden1,
                             FLAGS.hidden2)
    # Add to the Graph the Ops for loss calculation.
    loss = mnist.loss(logits, labels_placeholder)
    # Add to the Graph the Ops that calculate and apply gradients.
    train_op = mnist.training(loss, FLAGS.learning_rate)
    # Add the Op to compare the logits to the labels during evaluation.
    eval_correct = mnist.evaluation(logits, labels_placeholder)
    # Build the summary operation based on the TF collection of Summaries.
    summary_op = tf.merge_all_summaries()
    # Create a saver for writing training checkpoints.
    saver = tf.train.Saver()
    # Create a session for running Ops on the Graph.
    sess = tf.Session()
    # Run the Op to initialize the variables.
    init = tf.initialize_all_variables()
    sess.run(init)
    # Instantiate a SummaryWriter to output summaries and the Graph.
    summary_writer = tf.train.SummaryWriter(FLAGS.train_dir,
                                            graph_def=sess.graph_def)
    # And then after everything is built, start the training loop.
    for step in xrange(FLAGS.max_steps):
      start_time = time.time()
      # Fill a feed dictionary with the actual set of images and labels
      # for this particular training step.
      feed_dict = fill_feed_dict(data_sets.train,
                                 images_placeholder,
                                 labels_placeholder)
      # Run one step of the model.  The return values are the activations
      # from the `train_op` (which is discarded) and the `loss` Op.  To
      # inspect the values of your Ops or variables, you may include them
      # in the list passed to sess.run() and the value tensors will be
      # returned in the tuple from the call.
      _, loss_value = sess.run([train_op, loss],
                               feed_dict=feed_dict)
      duration = time.time() - start_time
      # Write the summaries and print an overview fairly often.
      if step % 100 == 0:
        # Print status to stdout.
        print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
        # Update the events file.
        summary_str = sess.run(summary_op, feed_dict=feed_dict)
        summary_writer.add_summary(summary_str, step)
      # Save a checkpoint and evaluate the model periodically.
      if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
        saver.save(sess, FLAGS.train_dir, global_step=step)
        # Evaluate against the training set.
        print('Training Data Eval:')
        do_eval(sess,
                eval_correct,
                images_placeholder,
                labels_placeholder,
                data_sets.train)
        # Evaluate against the validation set.
        print('Validation Data Eval:')
        do_eval(sess,
                eval_correct,
                images_placeholder,
                labels_placeholder,
                data_sets.validation)
        # Evaluate against the test set.
        print('Test Data Eval:')
        do_eval(sess,
                eval_correct,
                images_placeholder,
                labels_placeholder,
                data_sets.test)
Exemplo n.º 17
0
def run_training(learning_rate=FLAGS.learning_rate,
        momentum=FLAGS.momentum,
        max_norm=FLAGS.max_norm,
        weight_decay=FLAGS.weight_decay,
        keep_prob=FLAGS.keep_prob,
        keep_input=FLAGS.keep_input,
        beta2=FLAGS.beta2,
        num_layers=FLAGS.num_layers):
  """Train MNIST for a number of steps."""
  # Get the sets of images and labels for training, validation, and
  # test on MNIST.
  data_sets = input_data.read_data_sets(FLAGS.train_dir, FLAGS.fake_data)

  # Tell TensorFlow that the model will be built into the default Graph.
  with tf.Graph().as_default():
    # Generate placeholders for the images and labels.
    images_placeholder = tf.placeholder(tf.float32, shape=(None,
                                                         mnist.IMAGE_PIXELS), name='images')
    labels_placeholder = tf.placeholder(tf.int32, shape=[None], name='labels')

    keep_prob_pl = tf.placeholder(tf.float32, name='keep_prob_pl')
    keep_input_pl = tf.placeholder(tf.float32, name='keep_input_pl')
    learning_rate_pl = tf.placeholder(tf.float32, name='learning_rate_pl')
    
    def fill_feed_dict(data_set, batch_size=FLAGS.batch_size):
      # Create the feed_dict for the placeholders filled with the next
      # `batch size ` examples.
      images_feed, labels_feed = data_set.next_batch(batch_size,
                                                     FLAGS.fake_data)
      feed_dict = {
          images_placeholder: images_feed,
          labels_placeholder: labels_feed,
          keep_prob_pl: keep_prob,
          keep_input_pl: keep_input,
          learning_rate_pl: learning_rate
      }
      return feed_dict
    
    def fill_feed_dict_eval(data_set):
      return {
        images_placeholder: data_set._images,
        labels_placeholder: data_set._labels,
        keep_prob_pl: 1.0,
        keep_input_pl: 1.0,
      }

    # Build a Graph that computes predictions from the inference model.
    with tf.variable_scope('feed_forward_model') as scope:
      logits, bn = mnist.inference(images_placeholder,
                         FLAGS.hidden1,
                         num_layers,
                         weight_decay,
                         keep_prob_pl,
                         keep_input_pl,
                         max_norm)
                     
    # Add to the Graph the Ops for loss calculation.
    loss = mnist.loss(logits, labels_placeholder)
    #loss_eval = mnist.loss( logits_eval, labels_placeholder)
    # Add to the Graph the Ops that calculate and apply gradients.
    train_op = mnist.training(loss, learning_rate_pl, momentum, beta2)
    
    with tf.control_dependencies([train_op]):
      train_op = tf.group(*[b.get_assigner() for b in bn])           
    # Add the Op to compare the logits to the labels during evaluation.
    eval_correct = mnist.evaluation(logits, labels_placeholder)
    results = tf.placeholder( tf.float32, [4])

    summarize_evaluation = tf.scalar_summary(['correct_train', 'loss_train', 'correct_test', 'loss_test'], results)
    # Build the summary operation based on the TF collection of Summaries.
    summary_op = tf.merge_all_summaries()
  
    # Create a saver for writing training checkpoints.
    saver = tf.train.Saver(max_to_keep=2)

    train_loss = test_loss = 0
    train_cor = test_cor = 0.97
    previous_test_loss = None

    first_step = 0
    # Create a session for running Ops on the Graph.
    sess = tf.Session()

    summary_writer = tf.train.SummaryWriter(FLAGS.train_dir, sess.graph_def)
    restore_path = tf.train.latest_checkpoint("/Users/mikowals/projects/mnist")
    if restore_path:
      saver.restore(sess, restore_path)
      first_step = int(restore_path.split('/')[-1].split('-')[-1])
      print('retored variables from ',  restore_path)
    else:
      # Run the Op to initialize the variables.
      print('initializing variables')
      init = tf.initialize_all_variables()
      sess.run(init)

    # And then after everything is built, start the training loop.
    for step in range(first_step,FLAGS.max_steps):
      start_time = time.time()

      # Fill a feed dictionary with the actual set of images and labels
      # for this particular training step.
      feed_dict = fill_feed_dict(data_sets.train)
      
      # Run one step of the model.  The return values are the activations
      # from the `train_op` (which is discarded) and the `loss` Op.  To
      # inspect the values of your Ops or variables, you may include them
      # in the list passed to sess.run() and the value tensors will be
      # returned in the tuple from the call.
      _, loss_value = sess.run([train_op, loss],
                               feed_dict=feed_dict)
      
      duration = time.time() - start_time
      # Write the summaries and print an overview fairly often.
      
      # Save a checkpoint and evaluate the model periodically.
      if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
        saver.save(sess, FLAGS.train_dir, global_step=step)
        # Evaluate against the training set.
        
        # Evaluate against the validation set.
        print('training Data Eval:')
        feed_dict = fill_feed_dict_eval(data_sets.train)
        train_cor, train_loss = sess.run([eval_correct, loss], feed_dict=feed_dict)
        train_cor = train_cor / data_sets.train.num_examples
        print(train_cor, train_loss)
  
        print('Validation Data Eval:')
        feed_dict = fill_feed_dict_eval(data_sets.validation)
        test_cor, test_loss = sess.run([eval_correct, loss], feed_dict=feed_dict)
        test_cor = test_cor / data_sets.validation.num_examples
        print (test_cor, test_loss )
        #if previous_test_loss and test_loss > previous_test_loss:
        #  learning_rate = learning_rate * 0.6
        #if previous_test_loss and test_loss < previous_test_loss:
        #  learning_rate = learning_rate * 1.02
        #previous_test_loss = test_loss
        

      if step > 1000 and step % 100 == 0:
        # Print status to stdout.
        print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
        # Update the events file.
        feed_dict[results] = [
          train_cor, 
          train_loss, 
          test_cor, 
          test_loss]
        summary_str = sess.run(summary_op, feed_dict=feed_dict)
        summary_writer.add_summary(summary_str, step)

  return -test_cor 
Exemplo n.º 18
0
def run_training():
    # 获取数据
    data_sets = input_data.read_data_sets(FLAGS.input_data_dir, FLAGS.fake_data)
    # 在默认Graph下运行.
    with tf.Graph().as_default():
        # 配置graph
        images_placeholder, labels_placeholder = placeholder_inputs(FLAGS.batch_size)
        # logits是shape为(batch_size,NUM_CLASSES),表示每条数据预测后未归一化的概率分布
        logits = mnist.inference(images_placeholder,
                                    FLAGS.hidden1,
                                    FLAGS.hidden2)
        # 损失函数
        loss = mnist.loss(logits, labels_placeholder)
        train_op = mnist.training(loss, FLAGS.learning_rate)
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # 汇聚tensor
        summary = tf.summary.merge_all()
        # 建立初始化机制
        init = tf.global_variables_initializer()
        # 建立保存机制
        saver = tf.train.Saver()
        # 建立Session
        sess = tf.Session()

        # 建立一个SummaryWriter输出汇聚的tensor
        summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)

        # 开始执行

        # 执行变量
        sess.run(init)

        # 开始训练,2000次循环
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()

            #获取当次循环的数据
            feed_dict = fill_feed_dict(data_sets.train,
                                        images_placeholder,
                                        labels_placeholder)

            # 丢弃了train数据, 记录loss数据, sess.run(train_op)是最简单的训练代码
            # run(self, fetches, feed_dict=None, options=None, run_metadata=None)
            # fetches格式很自由,详情见help(tf.Session.run)
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            duration = time.time() - start_time

            # 每训练100次输出当前损失,并记录数据
            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
                summary_str = sess.run(summary, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            # 每1000次测试模型
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)
                # Evaluate against the training set.
                print('Training Data Eval:')
                do_eval(sess,
                        eval_correct,
                        images_placeholder,
                        labels_placeholder,
                        data_sets.train)
                # Evaluate against the validation set.
                print('Validation Data Eval:')
                do_eval(sess,
                        eval_correct,
                        images_placeholder,
                        labels_placeholder,
                        data_sets.validation)
                # Evaluate against the test set.
                print('Test Data Eval:')
                do_eval(sess,
                        eval_correct,
                        images_placeholder,
                        labels_placeholder,
                        data_sets.test)
Exemplo n.º 19
0
def run_training():
    """Train MNIST for a number of steps."""
    # Get the sets of images and labels for training, validation, and
    # test on MNIST.
    data_sets = input_data.read_data_sets(FLAGS.train_dir, FLAGS.fake_data)

    # labels and images are properties of the DataSet class, which is
    # defined at tensorflow/contrib/learn/python/learn/datasets/mnist.py
    # numpy.savetxt("/tmp/xx.csv", data_sets.train.labels, delimiter=",")
    # numpy.savetxt("/tmp/yy.csv", data_sets.test.images, delimiter=",")
    # sys.exit(1)

    # Tell TensorFlow that the model will be built into the default Graph.
    with tf.Graph().as_default():
        # Generate placeholders for the images and labels.
        images_placeholder, labels_placeholder = placeholder_inputs(FLAGS.batch_size)

        # Build a Graph that computes predictions from the inference model.
        logits = mnist.inference(images_placeholder, FLAGS.hidden1, FLAGS.hidden2)

        # Add to the Graph the Ops for loss calculation.
        loss = mnist.loss(logits, labels_placeholder)

        # Add to the Graph the Ops that calculate and apply gradients.
        train_op = mnist.training(loss, FLAGS.learning_rate)

        # Add the Op to compare the logits to the labels during evaluation.
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # Build the summary operation based on the TF collection of Summaries.
        summary_op = tf.merge_all_summaries()

        # Add the variable initializer Op.
        init = tf.initialize_all_variables()

        # Create a saver for writing training checkpoints.
        saver = tf.train.Saver()

        # Create a session for running Ops on the Graph.
        sess = tf.Session()

        # Instantiate a SummaryWriter to output summaries and the Graph.
        summary_writer = tf.train.SummaryWriter(FLAGS.train_dir, sess.graph)

        # And then after everything is built:

        # Run the Op to initialize the variables.
        sess.run(init)

        # Start the training loop.
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()

            # Fill a feed dictionary with the actual set of images and labels
            # for this particular training step.
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder, labels_placeholder)

            # Run one step of the model.  The return values are the activations
            # from the `train_op` (which is discarded) and the `loss` Op.  To
            # inspect the values of your Ops or variables, you may include them
            # in the list passed to sess.run() and the value tensors will be
            # returned in the tuple from the call.
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

            duration = time.time() - start_time

            # Write the summaries and print an overview fairly often.
            if step % 100 == 0:
                # Print status to stdout.
                print("Step %d: loss = %.2f (%.3f sec)" % (step, loss_value, duration))
                # Update the events file.
                summary_str = sess.run(summary_op, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            # Save a checkpoint and evaluate the model periodically.
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.train_dir, "checkpoint")
                saver.save(sess, checkpoint_file, global_step=step)
                # Evaluate against the training set.
                print("Training Data Eval:")
                do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.train)
                # Evaluate against the validation set.
                print("Validation Data Eval:")
                do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.validation)
                # Evaluate against the test set.
                print("Test Data Eval:")
                do_eval(sess, eval_correct, images_placeholder, labels_placeholder, data_sets.test)

            if (step + 1) == FLAGS.max_steps:
                float_formatter = lambda x: "%.2f" % x
                numpy.set_printoptions(formatter={"float_kind": float_formatter})
                feed_dict = fill_feed_dict(data_sets.test, images_placeholder, labels_placeholder)
                #  output with softmax
                #  output = sess.run(tf.nn.softmax(logits), feed_dict=feed_dict)
                #  output without softmax
                output = sess.run(tf.argmax(logits, dimension=1), feed_dict=feed_dict)
                numpy.savetxt("/tmp/outputX.csv", output, delimiter=",")
Exemplo n.º 20
0
def run_training():
    """Train MNIST for a number of steps."""
    # Get the sets of images and labels for training, validation, and test on MNIST.
    data_sets = aymericdamien.input_data.read_data_sets(FLAGS.train_dir, FLAGS.fake_data)

    # Tell TensorFlow that the model will be built into the default Graph.
    with tf.Graph().as_default():
        # Generate placeholders for the images and labels
        images_placeholder, labels_placeholder = placeholder_inputs(FLAGS.batch_size)

        # Build a graph the Ops for loss calculation
        logits = mnist.inference(
            images_placeholder,
            FLAGS.hidden1,
            FLAGS.hidden2
        )

        # Add to the graph ops for loss calculation
        loss = mnist.loss(logits, labels_placeholder)

        # Add to the Graph the Ops that calculate and apply gradients.
        train_op = mnist.training(loss, FLAGS.learning_rate)

        # Add the Op to compare the logits to the labels during evaluation
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # Build the summary operation based on the TF collection of Summaries.
        summary_op = tf.merge_all_summaries()

        # Create a saver for writing training checkpoints
        saver = tf.train.Saver()

        # create a session for running ops on the graph
        session = tf.Session()

        # Run the Op to initialize the variables
        init = tf.initialize_all_variables()
        session.run(init)

        # Instantiate a SummaryWriter to output summaries and the Graph
        summary_writer = tf.train.SummaryWriter(
            FLAGS.train_dir,
            graph_def=session.graph_def
        )

        # After everything is built start the training loop
        for step in xrange(FLAGS.max_steps):
            start_time = time()

            # Fill the feed dictionary with the actual set of images and labels
            # for this training step
            feed_dict = fill_feed_dict(
                data_sets.train,
                images_placeholder,
                labels_placeholder
            )

            # run one step of the model, return values are the activations from
            # the 'train_op' (which is discarded) and the 'loss' Op.  To inspect
            # the values of your Ops or Variables, you may include them in the list
            # passed to the session.Run() and the value tensors will be returned in
            # the tuple from the call
            _, loss_value = session.run(
                [train_op, loss],
                feed_dict=feed_dict
            )

            duration = time() - start_time

            if step % 100 == 0:
                # print status update
                print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
                # Update the events file.
                summary_str = session.run(summary_op, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)

            # Save a checkpoint and evaluate the model periodically
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                saver.save(session, FLAGS.train_dir, global_step=step)
                # Evaluate against the training set.
                print('Training Data Eval:')
                do_evaluation(
                    session,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.train)

                # Evaluate against the validation set.
                print('Validation Data Eval:')
                do_evaluation(
                    session,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.validation)
                # Evaluate against the test set.
                print('Test Data Eval:')
                do_evaluation(
                    session,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.test)
Exemplo n.º 21
0
def train_model():
    """
	This method deals with training the model in mnist-model.py by running optimization over a number of steps.
	"""

    #read input da(ta first
    #read_data_sets() function will ensure that the correct data has been downloaded to your local training folder
    #and then unpack that data to return a dictionary of DataSet instances.
    #FLAGS.fake_data can be ignored as it is used-for unit testing purposes
    print("Training Started! ")
    data = input_data.read_data_sets(FLAGS.input_data_dir, FLAGS.fake_data)

    #We need to specify that our model will be used with the Default global Tensor Flow graph.
    #A default global TF graph tf.Graph() is a collection of ops that may be executed as a group
    with tf.Graph().as_default():
        # Generate placeholders for the images and labels.
        images_ph, labels_ph = input_placeholders(FLAGS.batch_size)

        # Build a Graph that computes predictions from the inference model.
        logits = mnist.inference(images_ph, FLAGS.num_hidden1_nodes,
                                 FLAGS.num_hidden1_nodes)

        # Add the loss calculation op to the default Graph
        loss = mnist.loss(logits, labels_ph)

        # Add the minimization op the Graph
        train_op = mnist.training(loss, FLAGS.eta)

        # Add the Evaluation to test predictions to the Graph
        eval_correct = mnist.evaluation(logits, labels_ph)

        # Build the summary Tensor based on the TF collection of Summaries.
        summary = tf.summary.merge_all()

        # Add the variable initializer Op. to the Graph
        init = tf.global_variables_initializer()

        #Create a Tensor Flow Saver for writing Training Checkpoints
        saver = tf.train.Saver()

        #Now once all the build preparation is completed and all the ops are added to the Graph,
        #we need to create a Session in order to run the computaional Graph
        sess = tf.Session()

        #We also need to create a TF Summary Writer in order to record all the summaries and the Graph
        summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)

        #Now all the required Ops are attached to the Default Graph and all is built,
        #Start the session by initialing all the TF variables.
        sess.run(init)

        #Start the Training
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()

            #Update the feed_dict with the next batch of samples to train  with.
            feed_dict = fill_feed_dictionary(data.train, images_ph, labels_ph)

            #Run one step of the training by running Ops train_op and loss
            #No need to store the activations returned by the train_op minimization step
            _, loss_val = sess.run([train_op, loss], feed_dict=feed_dict)

            duration = time.time() - start_time

            #Record all the training summaries generates and print the training progress/statistics
            #after every 100th iteration
            if step % 100 == 0:
                # Print status to stdout.
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_val, duration))

                #Now we need to update the events file with summaries
                #Run the summary Op attached to the Graph
                #Everytime the summary is evaluated, new summaries are written into the events files
                summary_str = sess.run(summary, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

#Save the Model at every 1000th iteration and perform evaluation on complete data
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)

#Evaluate against the training set
            print('Training Data Evaluation:')
            do_eval(sess, eval_correct, images_ph, labels_ph, data.train)
            print('Validation Data Evaluation:')
            do_eval(sess, eval_correct, images_ph, labels_ph, data.validation)
            # Evaluate against the test set.
            print('Test Data Evaluation:')
            do_eval(sess, eval_correct, images_ph, labels_ph, data.test)
Exemplo n.º 22
0
def run_training():
    # Get the sets of images and labels for training, validation, and test on MNIST.
    data_sets = input_data.read_data_sets(FLAGS.input_data_dir,
                                          FLAGS.fake_data)

    # Tell TensorFlow that the model will be built into the default Graph.
    with tf.Graph().as_default():
        image_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size, mnist.IMAGE_PIEXLS)

        logits = mnist.inference(image_placeholder, FLAGS.hidden_unt1,
                                 FLAGS.hidden_unt2)

        loss = mnist.loss(logits, labels_placeholder)

        train_op = mnist.training(loss, learning_rate=FLAGS.lr)

        eval_correct = mnist.evalution(logits, labels_placeholder)

        summary = tf.summary.merge_all()

        # Add the variable initializer Op.
        init = tf.global_variables_initializer()

        # Create a saver for writing training checkpoints.
        saver = tf.train.Saver()

        with tf.Session() as sess:
            # Instantiate a SummaryWriter to output summaries and the Graph.
            summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)

            # Run the Op to initialize the variables.
            sess.run(init)

            feed_dict = fill_feed_dict(data_sets.train, image_placeholder,
                                       labels_placeholder)

            for step in xrange(FLAGS.max_steps):
                start_time = time.time()

                _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

                duration = time.time() - start_time

                if step % 100 == 0:
                    # Print status to stdout.
                    print('Step %d: loss = %.2f (%.3f sec)' %
                          (step, loss_value, duration))
                    # Update the events file.
                    summary_str = sess.run(summary, feed_dict=feed_dict)
                    summary_writer.add_summary(summary_str, step)
                    summary_writer.flush()

                # Save a checkpoint and evaluate the model periodically.
                if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                    checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                    saver.save(sess, checkpoint_file, global_step=step)
                    # Evaluate against the training set.
                    print('Training Data Eval:')
                    do_eval(sess, eval_correct, image_placeholder,
                            labels_placeholder, data_sets.train)
                    # Evaluate against the validation set.
                    print('Validation Data Eval:')
                    do_eval(sess, eval_correct, image_placeholder,
                            labels_placeholder, data_sets.validation)
                    # Evaluate against the test set.
                    print('Test Data Eval:')
                    do_eval(sess, eval_correct, image_placeholder,
                            labels_placeholder, data_sets.test)
Exemplo n.º 23
0
def run_training(settings: Settings) -> float:
    tf.gfile.MakeDirs(settings.log_dir)

    data_sets = copy.deepcopy(DATASETS)

    with tf.Graph().as_default():
        images_placeholder, labels_placeholder = placeholder_inputs(
            settings.batch_size, )

        logits = mnist.inference(
            images_placeholder,
            settings.hidden1,
            settings.hidden2,
        )

        loss = mnist.loss(logits, labels_placeholder)

        train_op = mnist.training(loss, settings.learning_rate)

        eval_correct = mnist.evaluation(logits, labels_placeholder)

        summary = tf.summary.merge_all()

        init = tf.global_variables_initializer()

        saver = tf.train.Saver()

        sess = tf.Session()

        summary_writer = tf.summary.FileWriter(settings.log_dir, sess.graph)

        sess.run(init)

        for step in range(settings.max_steps):

            feed_dict = fill_feed_dict(
                data_sets.train,
                images_placeholder,
                labels_placeholder,
                settings,
            )

            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

            # Write the summaries and print an overview fairly often.
            if step % 100 == 0:
                # Update the events file.
                summary_str = sess.run(summary, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            # Save a checkpoint and evaluate the model periodically.
            if (step + 1) % 1000 == 0 or (step + 1) == settings.max_steps:
                checkpoint_file = os.path.join(settings.log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)
                # Evaluate against the training set.
                # print('Training Data Eval:')
                do_eval(
                    sess,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.train,
                    settings,
                )
                # Evaluate against the validation set.
                # print('Validation Data Eval:')
                do_eval(
                    sess,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.validation,
                    settings,
                )
                # Evaluate against the test set.
                # print('Test Data Eval:')
                acc = do_eval(
                    sess,
                    eval_correct,
                    images_placeholder,
                    labels_placeholder,
                    data_sets.test,
                    settings,
                )
    return 1 - acc
def run_training():
  data_sets = input_data.read_data_sets(FLAGS.input_data_dir, FLAGS.fake_data)

  with tf.Graph().as_default():
    # Generate placeholders for the images and labels.
    images_placeholder, labels_placeholder = placeholder_inputs(
        FLAGS.batch_size)
    # Build a Graph that computes predictions from the inference model.
    logits = mnist.inference(images_placeholder,
                             FLAGS.hidden1,
                             FLAGS.hidden2) # 可參考  mnist.py 的實作

    # Add to the Graph the Ops for loss calculation.
    loss = mnist.loss(logits, labels_placeholder) # 可參考  mnist.py 的實作

    # Add to the Graph the Ops that calculate and apply gradients.
    train_op = mnist.training(loss, FLAGS.learning_rate) # 可參考  mnist.py 的實作

    # Add the Op to compare the logits to the labels during evaluation.
    eval_correct = mnist.evaluation(logits, labels_placeholder) # 可參考  mnist.py 的實作


    summary = tf.summary.merge_all() # 用在 tensorboard
    init = tf.global_variables_initializer()

    # 會把 training 的 checkpoints 記下來
    saver = tf.train.Saver()
    sess = tf.Session()
    summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)
    sess.run(init)

    for step in xrange(FLAGS.max_steps):
      start_time = time.time()
      feed_dict = fill_feed_dict(data_sets.train,
                                 images_placeholder,
                                 labels_placeholder)

      _, loss_value = sess.run([train_op, loss],
                               feed_dict=feed_dict)
      duration = time.time() - start_time
      
      if step % 100 == 0:
        # Print status to stdout.
        print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value, duration))
        # Update the events file.
        summary_str = sess.run(summary, feed_dict=feed_dict)
        summary_writer.add_summary(summary_str, step) # 寫到 log 內
        summary_writer.flush()

      # 這邊有教怎麼存 checkpoint, and evaluate the model periodically.
      if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
        checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt') # 重要!
        print( "checkpoint saved in : " + checkpoint_file )
        saver.save(sess, checkpoint_file, global_step=step)
        # Evaluate against the training set.
        print('Training Data Eval:')
        do_eval(sess,
                eval_correct,
                images_placeholder,
                labels_placeholder,
                data_sets.train) # 只有換 dataset 而已
        # Evaluate against the validation set.
        print('Validation Data Eval:')
        do_eval(sess,
                eval_correct,
                images_placeholder,
                labels_placeholder,
                data_sets.validation)
        # Evaluate against the test set.
        print('Test Data Eval:')
        do_eval(sess,
                eval_correct,
                images_placeholder,
                labels_placeholder,
                data_sets.test)
def run_training():
    """Train MNIST for a number of steps."""

    # Tell TensorFlow that the model will be built into the default Graph.
    with tf.Graph().as_default():
        # Input images and labels.
        images, labels = inputs(train=True,
                                batch_size=FLAGS.batch_size,
                                num_epochs=FLAGS.num_epochs)

        # Build a Graph that computes predictions from the inference model.
        logits = mnist.inference(images, FLAGS.hidden1, FLAGS.hidden2)

        # Add to the Graph the loss calculation.
        loss = mnist.loss(logits, labels)
        print('---------------------------- ' + str(logits))

        # Add to the Graph operations that train the model.
        train_op = mnist.training(loss, FLAGS.learning_rate)

        # The op for initializing the variables.
        init_op = tf.group(tf.global_variables_initializer(),
                           tf.local_variables_initializer())

        # Create a session for running operations in the Graph.
        sess = tf.Session()

        # Initialize the variables (the trained variables and the
        # epoch counter).
        sess.run(init_op)

        # Start input enqueue threads.
        coord = tf.train.Coordinator()
        threads = tf.train.start_queue_runners(sess=sess, coord=coord)

        try:
            step = 0
            while step != 3:
                start_time = time.time()

                # Run one step of the model.  The return values are
                # the activations from the `train_op` (which is
                # discarded) and the `loss` op.  To inspect the values
                # of your ops or variables, you may include them in
                # the list passed to sess.run() and the value tensors
                # will be returned in the tuple from the call.
                _, loss_value = sess.run([train_op, loss])

                #duration = time.time() - start_time

                # Print an overview fairly often.
                #if step % 100 == 0:
                #  print('Step %d: loss = %.2f (%.3f sec)' % (step, loss_value,
                #                                             duration))
                step += 1
        except tf.errors.OutOfRangeError:
            print('Done training for %d epochs, %d steps.' %
                  (FLAGS.num_epochs, step))
        finally:
            # When done, ask the threads to stop.
            coord.request_stop()

        # Wait for threads to finish.
        coord.join(threads)
        sess.close()
def run_training():
    # create input pipelines for training set and validation set
    train_image_batch, train_label_batch, TRAIN_SIZE = create_input_pipeline(
        LABELS_FILE_TRAIN,
        FLAGS.batch_size,
        num_epochs=None,
        produceVGGInput=False)
    val_image_batch, val_label_batch, VAL_SIZE = create_input_pipeline(
        LABELS_FILE_VAL,
        FLAGS.batch_size,
        num_epochs=None,
        produceVGGInput=False)
    printdebug("TRAIN_SIZE: %d VAL_SIZE: %d BATCH_SIZE: %d " %
               (TRAIN_SIZE, VAL_SIZE, FLAGS.batch_size))

    # Tell TensorFlow that the model will be built into the default Graph.
    #with tf.Graph().as_default():
    if True:
        # Generate placeholders for the images and labels.
        images_placeholder = tf.placeholder(tf.float32,
                                            shape=(FLAGS.batch_size,
                                                   NUM_PIXELS))
        labels_placeholder = tf.placeholder(tf.int32, shape=(FLAGS.batch_size))

        # Build a Graph that computes predictions from the inference model.
        logits = mnist.inference(images_placeholder, FLAGS.hidden1,
                                 FLAGS.hidden2)

        # Add to the Graph the Ops for loss calculation.
        loss = mnist.loss(logits, labels_placeholder)

        # Add to the Graph the Ops that calculate and apply gradients.
        train_op = mnist.training(loss, FLAGS.learning_rate, FLAGS.eps)

        # Add the Op to compare the logits to the labels during evaluation.
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # Build the summary operation based on the TF collection of Summaries.
        summary_op = tf.merge_all_summaries()

        # Add the variable initializer Op.
        init = tf.initialize_all_variables()

        # Create a saver for writing training checkpoints.
        saver = tf.train.Saver()

        # Create a session for running Ops on the Graph.
        sess = tf.Session()

        # Instantiate a SummaryWriter to output summaries and the Graph.
        summary_writer = tf.train.SummaryWriter(FLAGS.train_dir, sess.graph)

        # And then after everything is built:

        # Run the Op to initialize the variables.
        sess.run(init)
        tf.train.start_queue_runners(sess=sess)

        # Start the training loop.
        duration = 0.0
        for step in xrange(FLAGS.max_steps):

            start_time = time.time()
            # Fill a feed dictionary with the actual set of images and labels
            # for this particular training step.
            # Never, ever run image_batch.eval() + label_batch.eval() separately
            np_image_batch, np_label_batch = sess.run(
                [train_image_batch, train_label_batch])
            train_feed_dict = {
                images_placeholder: np_image_batch,
                labels_placeholder: np_label_batch
            }

            # Run one step of the model.  The return values are the activations
            # from the `train_op` (which is discarded) and the `loss` Op.  To
            # inspect the values of your Ops or variables, you may include them
            # in the list passed to sess.run() and the value tensors will be
            # returned in the tuple from the call.
            _, loss_value = sess.run([train_op, loss],
                                     feed_dict=train_feed_dict)
            duration += time.time() - start_time

            # Write the summaries and print an overview fairly often.
            if step % 100 == 0:
                # Print status to stdout.
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                duration = 0.0
                # Update the events file.
                summary_str = sess.run(summary_op, feed_dict=train_feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            # Save a checkpoint and evaluate the model periodically.
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.train_dir, 'checkpoint')
                saver.save(sess, checkpoint_file, global_step=step)

                # Evaluate against the training set.
                print('Training Data Eval:')
                do_eval(sess, eval_correct, TRAIN_SIZE, images_placeholder,
                        labels_placeholder, train_image_batch,
                        train_label_batch)
                # Evaluate against the validation set.
                print('Validation Data Eval:')
                do_eval(sess, eval_correct, VAL_SIZE, images_placeholder,
                        labels_placeholder, val_image_batch, val_label_batch)
                print('\n')
Exemplo n.º 27
0
def main(_):
    # build a model
    data = input_data.read_data_sets(FLAGS.data_dir, one_hot=False,
                                     fake_data=False)
    # make placeholders
    images = tf.placeholder(tf.float32, [FLAGS.batch_size, mnist.IMAGE_PIXELS],
                            name='inputs')
    labels = tf.placeholder(tf.int32, [FLAGS.batch_size], name='labels')

    # build model up to inference
    logits = mnist.inference(images, FLAGS.hidden_size, FLAGS.num_layers,
                             do_weightnorm=FLAGS.weightnorm,
                             do_batchnorm=FLAGS.batchnorm,
                             train=True)
    if not FLAGS.batchnorm:
        eval_logits = logits
    else:
        eval_logits = mnist.inference(images, FLAGS.hidden_size, FLAGS.num_layers,
                                      do_weightnorm=FLAGS.weightnorm,
                                      do_batchnorm=FLAGS.batchnorm,
                                      train=False)

    # get a loss function
    loss = mnist.loss(logits, labels, 'train_xent')
    eval_loss = mnist.loss(eval_logits, labels, 'eval_xent')
    # add a sumary of this to track the training loss
   
    # get training ops
    train_op, gstep = mnist.training(loss, FLAGS.learning_rate, FLAGS.momentum)

    # get an op to return precision on a batch
    eval_op = mnist.evaluation(eval_logits, labels)

    valid_var = tf.Variable(0, 'validation performance')
    valid_summ = tf.scalar_summary('validation accuracy', valid_var)

    # get summary op
    summarise = tf.merge_all_summaries()
    with tf.Session() as sess:
        writer = tf.train.SummaryWriter(FLAGS.logdir, sess.graph_def)
        tf.initialize_all_variables().run()
        # do some training
        print('nb: {} steps per epoch'.format(
            data.train.num_examples // FLAGS.batch_size))
        print('Step 0/{}.'.format(FLAGS.max_steps), end='')
        for i in range(FLAGS.max_steps):
            if (i+1) % 5 == 0:
                # write summaries, check on validation set
                if (i+1) % 100 == 0:
                    valid_perf = evaluate(sess,
                                          data.validation,
                                          logits,
                                          [eval_op, eval_loss],
                                          FLAGS.batch_size,
                                          images,
                                          labels,
                                          gstep,
                                          writer)
                    print()
                summ_str, _, _ = sess.run([summarise, loss, train_op],
                                          fill_feed(data.train, images, labels,
                                                    FLAGS.batch_size))
                writer.add_summary(summ_str, gstep.eval(session=sess))
            else:
                # do a step of training
                loss_val, _ = sess.run([loss, train_op],
                                   fill_feed(data.train, images, labels,
                                             FLAGS.batch_size))
                print('\rStep {} (loss {})'.format(i+1, loss_val), end='', flush=True)
        print('\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~')
        print('Test evaluation:')
        evaluate(sess, data.test, logits, [eval_op, eval_loss], FLAGS.batch_size, images, labels, gstep, writer)
        print('\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~')
Exemplo n.º 28
0
def run_training():
    """Train MNIST for a number of steps."""
    # Get the sets of images and labels for training, validation, and
    # test on MNIST.
    data_sets=reader(patchlength=0,\
              maxlength=300,\
              embedding_size=100,\
              num_verbs=10,\
              allinclude=False,\
              shorten=False,\
              shorten_front=False,\
              testflag=False,\
              passnum=0,\
              dpflag=False)

    # Tell TensorFlow that the model will be built into the default Graph.
    with tf.Graph().as_default():
        # Generate placeholders for the images and labels.
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)

        # Build a Graph that computes predictions from the inference model.
        logits, keep_prob = mnist.inference(images_placeholder, FLAGS.hidden1,
                                            FLAGS.hidden2)

        # Add to the Graph the Ops for loss calculation.
        loss = mnist.loss(logits, labels_placeholder)

        # Add to the Graph the Ops that calculate and apply gradients.
        train_op = mnist.training(loss, FLAGS.learning_rate)

        # Add the Op to compare the logits to the labels during evaluation.
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # Build the summary Tensor based on the TF collection of Summaries.
        summary = tf.summary.merge_all()

        # Add the variable initializer Op.
        init = tf.global_variables_initializer()

        # Create a saver for writing training checkpoints.
        saver = tf.train.Saver()

        # Create a session for running Ops on the Graph.
        sess = tf.Session()

        # Instantiate a SummaryWriter to output summaries and the Graph.
        summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)

        # And then after everything is built:

        # Run the Op to initialize the variables.
        with tf.Session() as session:
            sess.run(init)
            if True:
                model_file = tf.train.latest_checkpoint(FLAGS.log_dir)
                saver.restore(sess, model_file)

            # Start the training loop.
            start_time = time.time()
            for step in xrange(FLAGS.max_steps):

                # Fill a feed dictionary with the actual set of images and labels
                # for this particular training step.

                inputs, answers = data_sets.list_tags(FLAGS.batch_size,
                                                      test=False)
                #      print(len(inputs),len(inputs[0]),inputs[0])
                #      input()
                inputs2 = []
                for i in range(len(inputs)):
                    inputs2.append(inputs[i] / 255)
#      print(len(inputs2),len(inputs2[0]),inputs2[0])
#      input()
                feed_dict = {
                    images_placeholder: inputs2,
                    labels_placeholder: answers,
                    keep_prob: 0.5
                }
                # Run one step of the model.  The return values are the activations
                # from the `train_op` (which is discarded) and the `loss` Op.  To
                # inspect the values of your Ops or variables, you may include them
                # in the list passed to sess.run() and the value tensors will be
                # returned in the tuple from the call.
                _, loss_value, logi = sess.run([train_op, loss, logits],
                                               feed_dict=feed_dict)

                duration = time.time() - start_time

                # Write the summaries and print an overview fairly often.
                if step % 100 == 0:
                    # Print status to stdout.
                    print('Step %d: loss = %.2f (%.3f sec)' %
                          (step, loss_value, duration))
                    #            print(logi)
                    #            print(answers)
                    for i0 in range(FLAGS.batch_size):
                        lgans = np.argmax(logi[i0])
                        if (lgans != answers[i0] and False):
                            for tt in range(784):
                                if (tt % 28 == 0): print(' ')
                                if (inputs[i0][tt] != 0):
                                    print('1', end=' ')
                                else:
                                    print('0', end=' ')


#                      print('np',np.argmax(i),answers,answers[i0],'np')
                            print(lgans, answers[i0])
                    # Update the events file.
                    summary_str = sess.run(summary, feed_dict=feed_dict)
                    summary_writer.add_summary(summary_str, step)
                    summary_writer.flush()
                if (step + 1) % 500 == 0 or (step + 1) == FLAGS.max_steps:
                    #print('Training Data Eval:')
                    do_eval(sess, eval_correct, data_sets, FLAGS.batch_size,
                            images_placeholder, labels_placeholder, keep_prob)
                    do_evalfake(sess, eval_correct, data_sets,
                                FLAGS.batch_size, images_placeholder,
                                labels_placeholder, logits, keep_prob)
                    # Save a checkpoint and evaluate the model periodically.
                    #if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                    checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                    saver.save(sess, checkpoint_file, global_step=step)
                    print('saved to', checkpoint_file)
                '''
Exemplo n.º 29
0
def run_training():
    """
    TRAIN MNIST for a number of steps
    """
    # Get the sets of images and labels for training, validation, and
    # test on MNIST
    data_sets = input_data.read_data_sets(FLAGS.input_data_dir,
                                          FLAGS.fake_data)

    # Tell TensorFlow that the model will be built into the default Graph
    with tf.Graph().as_default():
        # Generate placeholders for the images and labels
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)

        # Build a Graph that computes predictions from the inference model
        logits = mnist.inference(images_placeholder, FLAGS.hidden1,
                                 FLAGS.hidden2)

        # Add to the Graph the Ops for loss calculation
        loss = mnist.loss(logits, labels_placeholder)

        # Add to the Graph the Ops that calculate and apply gradients
        train_op = mnist.training(loss, FLAGS.learning_rate)

        # Add the Op to compare the logits to the labels during evaluation
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # Build the summary Tensor based on the TF collection of Summaries
        summary = tf.summary.merge_all()

        # Add the variable initializer Op
        init = tf.global_variables_initializer()

        # Create a saver for writing training checkpoints
        saver = tf.train.Saver()
        # Create a session for running Ops on the Graph
        sess = tf.Session()
        # Instantiate a SummaryWriter to output summaries and the Graph
        summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)

        # And then after everything is built:

        # Run the Op to initialize the variables
        sess.run(init)

        # Start the training loop
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()
            """
            TODO: Add progress bar

            """
            # Fill a feed dictionary with the actual set of images and labels
            # for t his particular training step
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)
            # Run one step of the model. The return values are the activations
            # from the 'train_op' (which is discarded) and the 'loss' Op.
            # To inspect the values of your Ops or variables, you m ay include
            # them in the list passed to sess.run() and the value tensors
            # will be returned in the tuple from the calculate
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

            duration = time.time() - start_time

            # Write the summaries and print an overview fairly often
            if step % 100 == 0:
                # Print status to stdout
                print('Step %d: loss = %.2f (%.3f)' %
                      (step, loss_value, duration))
                #Update the events file
                summary_str = sess.run(summary, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()

            # Save a checkpoint and evaluate the model periodically
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)
                # Evaluate against the training set
                print('Training Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.train)
                # Evaluate against the validationset
                print('Validation Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.validation)
                # Evaluate against the test set
                print('Test Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.test)
Exemplo n.º 30
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def run_training():
    """Train MNIST for a number of steps."""
    # Get the sets of images and labels for training, validation, and
    # test on MNIST.
    data_sets = input_data.read_data_sets(FLAGS.data_dir, FLAGS.fake_data)

    # Tell TensorFlow that the model will be built into the default Graph.
    with tf.Graph().as_default():
        # Generate placeholders for the images and labels.
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)

        # Build a Graph that computes predictions from the inference model.
        logits = mnist.inference(images_placeholder)

        # Add to the Graph the Ops for loss calculation.
        loss = mnist.loss(logits, labels_placeholder)

        # Add to the Graph the Ops that calculate and apply gradients.
        train_op = mnist.training(loss, FLAGS.batch_size)

        # Add the Op to compare the logits to the labels during evaluation.
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # Build the summary operation based on the TF collection of Summaries.
        summary_op = tf.summary.merge_all()

        # Create a saver for writing training checkpoints.
        saver = tf.train.Saver()

        # Create a session for running Ops on the Graph.
        sess = tf.Session()

        # Run the Op to initialize the variables.
        init = tf.global_variables_initializer()
        sess.run(init)

        # Instantiate a SummaryWriter to output summaries and the Graph.
        summary_writer = tf.summary.FileWriter(FLAGS.train_dir,
                                               graph_def=sess.graph_def)

        # And then after everything is built, start the training loop.
        for step in range(FLAGS.max_steps):
            start_time = time.time()

            # Fill a feed dictionary with the actual set of images and labels
            # for this particular training step.
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)

            # Run one step of the model.  The return values are the activations
            # from the `train_op` (which is discarded) and the `loss` Op.  To
            # inspect the values of your Ops or variables, you may include them
            # in the list passed to sess.run() and the value tensors will be
            # returned in the tuple from the call.
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)

            duration = time.time() - start_time

            # Write the summaries and print an overview fairly often.
            if step % 100 == 0:
                # Print status to stdout.
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                # Update the events file.
                summary_str = sess.run(summary_op, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)

            # Save a checkpoint and evaluate the model periodically.
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                saver.save(sess, FLAGS.train_dir, global_step=step)
                # Evaluate against the training set.
                print('Training Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.train)
                # Evaluate against the validation set.
                print('Validation Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.validation)
                # Evaluate against the test set.
                print('Test Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.test)
def run_training():
    # 获取用于训练,验证和测试的图像数据以及类别标签集合
    data_sets = input_data.read_data_sets(FLAGS.input_data_dir,
                                          FLAGS.fake_data)
    # 告诉TensorFlow模型将会被构建在默认的Graph上.
    with tf.Graph().as_default():
        # 为图像特征向量数据和类标签数据创建输入占位符
        images_placeholder, labels_placeholder = placeholder_inputs(
            FLAGS.batch_size)
        # 从前向推断模型中构建用于预测的计算图
        logits = mnist.inference(images_placeholder, FLAGS.hidden1,
                                 FLAGS.hidden2)
        # 为计算图添加计算损失的节点.
        loss = mnist.loss(logits, labels_placeholder)
        # 为计算图添加计算和应用梯度的训练节点
        train_op = mnist.training(loss, FLAGS.learning_rate)
        # 添加节点用于在评估过程中比较 logits 和 ground-truth labels .
        eval_correct = mnist.evaluation(logits, labels_placeholder)

        # 基于 TF collection of Summaries构建汇总张量.
        merged_summaries = tf.summary.merge_all()
        # 创建一个 saver 用于写入 训练过程中的模型的检查点文件(checkpoints).
        saver = tf.train.Saver()

        # 添加变量初始化节点(variable initializer Op).
        init = tf.global_variables_initializer()
        # 创建一个会话用来运行计算图中的节点
        sess = tf.Session()
        # 实例化一个 SummaryWriter 输出 summaries 和 Graph.
        summary_writer = tf.summary.FileWriter(FLAGS.log_dir, sess.graph)
        summary_writer.flush()

        # 运行初始化节点来初始化所有变量(Variables).
        sess.run(init)

        # 开启训练循环.
        for step in xrange(FLAGS.max_steps):
            start_time = time.time()
            # 在此特定的训练步,使用真实的图像和类标签数据集填充 feed dictionary
            feed_dict = fill_feed_dict(data_sets.train, images_placeholder,
                                       labels_placeholder)
            # 在当前批次样本上把模型运行一步(run one step).
            # 返回值是从`train_op`和`loss`节点拿到的activations
            _, loss_value = sess.run([train_op, loss], feed_dict=feed_dict)
            # 计算当前批次的训练花费的时间
            duration = time.time() - start_time
            # 每隔100个批次就写入summaries并输出overview
            if step % 100 == 0:
                print('Step %d: loss = %.2f (%.3f sec)' %
                      (step, loss_value, duration))
                # 更新事件文件.还是调用sess.run()方法
                summary_str = sess.run(merged_summaries, feed_dict=feed_dict)
                summary_writer.add_summary(summary_str, step)
                summary_writer.flush()
            # 周期性的保存一个检查点文件并评估当前模型的性能
            if (step + 1) % 1000 == 0 or (step + 1) == FLAGS.max_steps:
                checkpoint_file = os.path.join(FLAGS.log_dir, 'model.ckpt')
                saver.save(sess, checkpoint_file, global_step=step)
                # 在所有训练集上评估模型.
                print('Training Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.train)
                # 在验证集上评估模型.
                print('Validation Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.validation)
                # 在测试集上评估模型.
                print('Test Data Eval:')
                do_eval(sess, eval_correct, images_placeholder,
                        labels_placeholder, data_sets.test)