def recognize(image_path, weights_path, is_vis=True):
"""
:param image_path:
:param weights_path:
:param is_vis:
:return:
"""
image = cv2.imread(image_path, cv2.IMREAD_COLOR)
image = cv2.resize(image, (100, 32))
image = np.expand_dims(image, axis=0).astype(np.float32)
inputdata = tf.placeholder(dtype=tf.float32,
shape=[1, 32, 100, 3],
name='input')
net = crnn_model.ShadowNet(phase='Test',
hidden_nums=256,
layers_nums=2,
seq_length=25,
num_classes=37)
with tf.variable_scope('shadow'):
net_out = net.build_shadownet(inputdata=inputdata)
decodes, _ = tf.nn.ctc_beam_search_decoder(inputs=net_out,
sequence_length=25 * np.ones(1),
merge_repeated=False)
decoder = data_utils.TextFeatureIO()
# config tf session
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = config.cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = config.cfg.TRAIN.TF_ALLOW_GROWTH
# config tf saver
saver = tf.train.Saver()
sess = tf.Session(config=sess_config)
with sess.as_default():
saver.restore(sess=sess, save_path=weights_path)
preds = sess.run(decodes, feed_dict={inputdata: image})
preds = decoder.writer.sparse_tensor_to_str(preds[0])
logger.info('Predict image {:s} label {:s}'.format(
ops.split(image_path)[1], preds[0]))
if is_vis:
plt.figure('CRNN Model Demo')
plt.imshow(
cv2.imread(image_path, cv2.IMREAD_COLOR)[:, :, (2, 1, 0)])
plt.show()
sess.close()
return
def write_features(dataset_dir, save_dir):
"""
:param dataset_dir:
:param save_dir:
:return:
"""
if not ops.exists(save_dir):
os.makedirs(save_dir)
print('Initialize the dataset provider ......')
provider = data_provider.TextDataProvider(dataset_dir=dataset_dir, annotation_name='sample.txt',
validation_set=True, validation_split=0.15, shuffle=None,
normalization=None)
print('Dataset provider intialize complete')
feature_io = data_utils.TextFeatureIO()
# write train tfrecords
print('Start writing training tf records')
train_images = provider.train.images
train_images = [bytes(list(np.reshape(tmp, [100 * 32 * 3]))) for tmp in train_images]
train_labels = provider.train.labels
train_imagenames = provider.train.imagenames
train_tfrecord_path = ops.join(save_dir, 'train_feature.tfrecords')
feature_io.writer.write_features(tfrecords_path=train_tfrecord_path, labels=train_labels, images=train_images,
imagenames=train_imagenames)
# write test tfrecords
print('Start writing testing tf records')
test_images = provider.test.images
test_images = [bytes(list(np.reshape(tmp, [100 * 32 * 3]))) for tmp in test_images]
test_labels = provider.test.labels
test_imagenames = provider.test.imagenames
test_tfrecord_path = ops.join(save_dir, 'test_feature.tfrecords')
feature_io.writer.write_features(tfrecords_path=test_tfrecord_path, labels=test_labels, images=test_images,
imagenames=test_imagenames)
# write val tfrecords
print('Start writing validation tf records')
val_images = provider.validation.images
val_images = [bytes(list(np.reshape(tmp, [100 * 32 * 3]))) for tmp in val_images]
val_labels = provider.validation.labels
val_imagenames = provider.validation.imagenames
val_tfrecord_path = ops.join(save_dir, 'validation_feature.tfrecords')
feature_io.writer.write_features(tfrecords_path=val_tfrecord_path, labels=val_labels, images=val_images,
imagenames=val_imagenames)
return
def getRecognize():
#该函数用于从ckpt文件中恢复网络，并返回一个可以识别图像内容的recognize函数
with tf.Graph().as_default() as net2_graph:
inputdata = tf.placeholder(dtype=tf.float32, shape=[1, 32, 100, 3], name='input')
net = crnn_model.ShadowNet(phase='Test', hidden_nums=256, layers_nums=2, seq_length=25, num_classes=20)
with tf.variable_scope('shadow'):
net_out = net.build_shadownet(inputdata=inputdata)
decodes, _ = tf.nn.ctc_beam_search_decoder(inputs=net_out, sequence_length=25*np.ones(1), merge_repeated=False)
decoder = data_utils.TextFeatureIO()
saver2 = tf.train.Saver()
sess2 = tf.Session(graph=net2_graph)
saver2.restore(sess=sess2, save_path=FLAGS.crnnWeightsPath)
def recognize(img, rst):
'''
按照前一级网络定位的结果进行识别，并在图像上进行标记
输入：
img：需要进行识别的原图
rst：含有RBOX坐标的dict
返回：
img：完成识别并进行相应标注的图像
'''
for i,t in enumerate(rst['text_lines']):
#先画RBOX框
d = np.array([t['x0'], t['y0'], t['x1'], t['y1'], t['x2'],
t['y2'], t['x3'], t['y3']], dtype='int32')
d = d.reshape(-1, 2)#按顺序两个元素组成一列，形成四个点的格式
cv2.polylines(img, [d], isClosed=True, color=(255, 255, 0))
#将RBOX框内内容送入识别器
x0 = int(min(t['x0'], t['x1'], t['x2'], t['x3']))
x1 = int(max(t['x0'], t['x1'], t['x2'], t['x3']))
y0 = int(min(t['y0'], t['y1'], t['y2'], t['y3']))
y1 = int(max(t['y0'], t['y1'], t['y2'], t['y3']))
offset = (x1-x0)//10 #由于定位存在问题，导致RBOX框的水平宽度经常不足
image = img[y0:y1, max(0, x0-offset):x1+offset]
image = cv2.resize(image, (100, 32))
image = np.expand_dims(image, axis=0).astype(np.float32)
preds = sess2.run(decodes, feed_dict={inputdata: image})
preds = decoder.writer.sparse_tensor_to_str(preds[0])
#根据识别判断对错并显示识别内容
if judge(str(preds[0])) == False:
img = cv2.putText(img, preds[0], (x1, y1), cv2.FONT_HERSHEY_COMPLEX, 0.4, (255, 0 ,0), True)
img = cv2.line(img, (x0, y0), (x1, y1), (0, 0 ,255), thickness=4)
return img
return recognize
def execute(self, data, batch_size):
sess = self.output['sess']
x = self.output['x']
y_ = self.output['y_']
decoder = data_utils.TextFeatureIO()
ret = []
for i in range(batch_size):
image = Image.open(data[i])
image = cv2.cvtColor(np.asarray(image), cv2.COLOR_RGB2BGR)
image = cv2.resize(image, (config.cfg.TRAIN.width, 32))
image = np.expand_dims(image, axis=0).astype(np.float32)
preds = sess.run(y_, feed_dict={x: image})
preds = decoder.writer.sparse_tensor_to_str(preds[0])[0] + '\n'
ret.append(preds)
return ret
def getRecognize():
#该函数用于从ckpt文件中恢复网络，并返回一个可以识别图像内容的recognize函数
with tf.Graph().as_default() as net2_graph:
inputdata = tf.placeholder(dtype=tf.float32,
shape=[1, 32, 100, 3],
name='input')
net = crnn_model.ShadowNet(phase='Test',
hidden_nums=256,
layers_nums=2,
seq_length=25,
num_classes=19)
with tf.variable_scope('shadow'):
net_out = net.build_shadownet(inputdata=inputdata)
decodes, _ = tf.nn.ctc_beam_search_decoder(inputs=net_out,
sequence_length=25 *
np.ones(1),
merge_repeated=False)
decoder = data_utils.TextFeatureIO()
saver2 = tf.train.Saver()
sess2 = tf.Session(graph=net2_graph)
saver2.restore(sess=sess2, save_path=FLAGS.crnnWeightsPath)
def recognize(path):
'''
对指定路径下的所有图像执行crnn网络识别，并在命令行上显示结果
输入：
path：指定数据集路劲
返回：
'''
imageList = getfilelist(path)
for imagePath in imageList:
image = cv2.imread(imagePath, cv2.IMREAD_COLOR)
image = cv2.resize(image, (100, 32))
image = np.expand_dims(image, axis=0).astype(np.float32)
preds = sess2.run(decodes, feed_dict={inputdata: image})
preds = decoder.writer.sparse_tensor_to_str(preds[0])
print('Predict image {:s} label {:s}'.format(
os.path.split(imagePath)[1], preds[0]))
return recognize
def test_shadownet(dataset_dir, weights_path, is_vis=False, is_recursive=True):
"""
:param dataset_dir:
:param weights_path:
:param is_vis:
:param is_recursive:
:return:
"""
# Initialize the record decoder
decoder = data_utils.TextFeatureIO().reader
images_t, labels_t, imagenames_t = decoder.read_features(ops.join(
dataset_dir, 'test_feature.tfrecords'),
num_epochs=None)
if not is_recursive:
images_sh, labels_sh, imagenames_sh = tf.train.shuffle_batch(
tensors=[images_t, labels_t, imagenames_t],
batch_size=32,
capacity=1000 + 32 * 2,
min_after_dequeue=2,
num_threads=4)
else:
images_sh, labels_sh, imagenames_sh = tf.train.batch(
tensors=[images_t, labels_t, imagenames_t],
batch_size=32,
capacity=1000 + 32 * 2,
num_threads=4)
images_sh = tf.cast(x=images_sh, dtype=tf.float32)
# build shadownet
net = crnn_model.ShadowNet(phase='Test',
hidden_nums=256,
layers_nums=2,
seq_length=25,
num_classes=37)
with tf.variable_scope('shadow'):
net_out = net.build_shadownet(inputdata=images_sh)
decoded, _ = tf.nn.ctc_beam_search_decoder(net_out,
25 * np.ones(32),
merge_repeated=False)
# config tf session
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = config.cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = config.cfg.TRAIN.TF_ALLOW_GROWTH
# config tf saver
saver = tf.train.Saver()
sess = tf.Session(config=sess_config)
test_sample_count = 0
for record in tf.python_io.tf_record_iterator(
ops.join(dataset_dir, 'test_feature.tfrecords')):
test_sample_count += 1
loops_nums = int(math.ceil(test_sample_count / 32))
# loops_nums = 100
with sess.as_default():
# restore the model weights
saver.restore(sess=sess, save_path=weights_path)
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
print('Start predicting ......')
if not is_recursive:
predictions, images, labels, imagenames = sess.run(
[decoded, images_sh, labels_sh, imagenames_sh])
imagenames = np.reshape(imagenames, newshape=imagenames.shape[0])
imagenames = [tmp.decode('utf-8') for tmp in imagenames]
preds_res = decoder.sparse_tensor_to_str(predictions[0])
gt_res = decoder.sparse_tensor_to_str(labels)
accuracy = []
for index, gt_label in enumerate(gt_res):
pred = preds_res[index]
totol_count = len(gt_label)
correct_count = 0
try:
for i, tmp in enumerate(gt_label):
if tmp == pred[i]:
correct_count += 1
except IndexError:
continue
finally:
try:
accuracy.append(correct_count / totol_count)
except ZeroDivisionError:
if len(pred) == 0:
accuracy.append(1)
else:
accuracy.append(0)
accuracy = np.mean(np.array(accuracy).astype(np.float32), axis=0)
print('Mean test accuracy is {:5f}'.format(accuracy))
for index, image in enumerate(images):
print(
'Predict {:s} image with gt label: {:s} **** predict label: {:s}'
.format(imagenames[index], gt_res[index],
preds_res[index]))
if is_vis:
plt.imshow(image[:, :, (2, 1, 0)])
plt.show()
else:
accuracy = []
for epoch in range(loops_nums):
predictions, images, labels, imagenames = sess.run(
[decoded, images_sh, labels_sh, imagenames_sh])
imagenames = np.reshape(imagenames,
newshape=imagenames.shape[0])
imagenames = [tmp.decode('utf-8') for tmp in imagenames]
preds_res = decoder.sparse_tensor_to_str(predictions[0])
gt_res = decoder.sparse_tensor_to_str(labels)
for index, gt_label in enumerate(gt_res):
pred = preds_res[index]
totol_count = len(gt_label)
correct_count = 0
try:
for i, tmp in enumerate(gt_label):
if tmp == pred[i]:
correct_count += 1
except IndexError:
continue
finally:
try:
accuracy.append(correct_count / totol_count)
except ZeroDivisionError:
if len(pred) == 0:
accuracy.append(1)
else:
accuracy.append(0)
for index, image in enumerate(images):
print(
'Predict {:s} image with gt label: {:s} **** predict label: {:s}'
.format(imagenames[index], gt_res[index],
preds_res[index]))
# if is_vis:
# plt.imshow(image[:, :, (2, 1, 0)])
# plt.show()
accuracy = np.mean(np.array(accuracy).astype(np.float32), axis=0)
print('Test accuracy is {:5f}'.format(accuracy))
coord.request_stop()
coord.join(threads=threads)
sess.close()
return
def write_features(dataset_dir, save_dir, batch_size):
"""
:param dataset_dir:
:param save_dir:
:param batch_size:
:return:
"""
if not ops.exists(save_dir):
os.makedirs(save_dir)
print('Initialize the dataset provider ......')
provider = data_provider.TextDataProvider(dataset_dir=dataset_dir, annotation_name='sample.txt',
validation_set=True, validation_split=0.05, shuffle='every_epoch',
normalization=None)
print('Dataset provider intialize complete')
feature_io = data_utils.TextFeatureIO()
# write train tfrecords
print('Start writing training tf records')
train_images_nums = provider.train.num_examples
epoch_nums = int(math.ceil(train_images_nums / batch_size))
for loop in tqdm.tqdm(range(epoch_nums)):
train_images, train_labels, train_imagenames = provider.train.next_batch(batch_size=batch_size)
train_images = [cv2.resize(tmp, (width,32)) for tmp in train_images]
train_images = [bytes(list(np.reshape(tmp, [width * 32*3]))) for tmp in train_images]
if loop*batch_size+batch_size > train_images_nums:
train_tfrecord_path = ops.join(save_dir, 'train_feature_{:d}_{:d}.tfrecords'.format(
loop * batch_size, train_images_nums))
else:
train_tfrecord_path = ops.join(save_dir, 'train_feature_{:d}_{:d}.tfrecords'.format(
loop*batch_size, loop*batch_size+batch_size))
feature_io.writer.write_features(tfrecords_path=train_tfrecord_path, labels=train_labels, images=train_images,
imagenames=train_imagenames)
# write test tfrecords
print('Start writing testing tf records')
test_images_nums = provider.test.num_examples
epoch_nums = int(math.ceil(test_images_nums / batch_size))
for loop in tqdm.tqdm(range(epoch_nums)):
test_images, test_labels, test_imagenames = provider.test.next_batch(batch_size=batch_size)
test_images = [cv2.resize(tmp, (32, width)) for tmp in test_images]
test_images = [bytes(list(np.reshape(tmp, [32 * width * 3]))) for tmp in test_images]
if loop * batch_size + batch_size > test_images_nums:
test_tfrecord_path = ops.join(save_dir, 'test_feature_{:d}_{:d}.tfrecords'.format(
loop*batch_size, test_images_nums))
else:
test_tfrecord_path = ops.join(save_dir, 'test_feature_{:d}_{:d}.tfrecords'.format(
loop * batch_size, loop * batch_size + batch_size))
feature_io.writer.write_features(tfrecords_path=test_tfrecord_path, labels=test_labels, images=test_images,
imagenames=test_imagenames)
# write val tfrecords
print('Start writing validation tf records')
val_image_nums = provider.validation.num_examples
epoch_nums = int(math.ceil(val_image_nums / batch_size))
for loop in tqdm.tqdm(range(epoch_nums)):
val_images, val_labels, val_imagenames = provider.validation.next_batch(batch_size=batch_size)
val_images = [cv2.resize(tmp, (32, width)) for tmp in val_images]
val_images = [bytes(list(np.reshape(tmp, [32 * width * 3]))) for tmp in val_images]
if loop*batch_size+batch_size > val_image_nums:
val_tfrecord_path = ops.join(save_dir, 'validation_feature_{:d}_{:d}.tfrecords'.format(
loop*batch_size, val_image_nums))
else:
val_tfrecord_path = ops.join(save_dir, 'validation_feature_{:d}_{:d}.tfrecords'.format(
loop * batch_size, loop*batch_size+batch_size))
feature_io.writer.write_features(tfrecords_path=val_tfrecord_path, labels=val_labels, images=val_images,
imagenames=val_imagenames)
return
def train_shadownet(dataset_dir, weights_path=None):
"""
:param dataset_dir:
:param weights_path:
:return:
"""
# decode the tf records to get the training data
decoder = data_utils.TextFeatureIO().reader
images, labels, imagenames = decoder.read_features(ops.join(
dataset_dir, 'train_feature.tfrecords'),
num_epochs=None)
inputdata, input_labels, input_imagenames = tf.train.shuffle_batch(
tensors=[images, labels, imagenames],
batch_size=32,
capacity=1000 + 2 * 32,
min_after_dequeue=100,
num_threads=1)
inputdata = tf.cast(x=inputdata, dtype=tf.float32)
# initializa the net model
shadownet = crnn_model.ShadowNet(phase='Train',
hidden_nums=256,
layers_nums=2,
seq_length=25,
num_classes=37)
with tf.variable_scope('shadow', reuse=False):
net_out = shadownet.build_shadownet(inputdata=inputdata)
cost = tf.reduce_mean(
tf.nn.ctc_loss(labels=input_labels,
inputs=net_out,
sequence_length=25 * np.ones(32)))
decoded, log_prob = tf.nn.ctc_beam_search_decoder(net_out,
25 * np.ones(32),
merge_repeated=False)
sequence_dist = tf.reduce_mean(
tf.edit_distance(tf.cast(decoded[0], tf.int32), input_labels))
global_step = tf.Variable(0, name='global_step', trainable=False)
starter_learning_rate = config.cfg.TRAIN.LEARNING_RATE
learning_rate = tf.train.exponential_decay(starter_learning_rate,
global_step,
config.cfg.TRAIN.LR_DECAY_STEPS,
config.cfg.TRAIN.LR_DECAY_RATE,
staircase=True)
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
optimizer = tf.train.AdadeltaOptimizer(
learning_rate=learning_rate).minimize(loss=cost,
global_step=global_step)
# Set tf summary
tboard_save_path = 'tboard/shadownet'
if not ops.exists(tboard_save_path):
os.makedirs(tboard_save_path)
tf.summary.scalar(name='Cost', tensor=cost)
tf.summary.scalar(name='Learning_Rate', tensor=learning_rate)
tf.summary.scalar(name='Seq_Dist', tensor=sequence_dist)
merge_summary_op = tf.summary.merge_all()
# Set saver configuration
saver = tf.train.Saver()
model_save_dir = 'model/shadownet'
if not ops.exists(model_save_dir):
os.makedirs(model_save_dir)
train_start_time = time.strftime('%Y-%m-%d-%H-%M-%S',
time.localtime(time.time()))
model_name = 'shadownet_{:s}.ckpt'.format(str(train_start_time))
model_save_path = ops.join(model_save_dir, model_name)
# Set sess configuration
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = config.cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = config.cfg.TRAIN.TF_ALLOW_GROWTH
sess = tf.Session(config=sess_config)
summary_writer = tf.summary.FileWriter(tboard_save_path)
summary_writer.add_graph(sess.graph)
# Set the training parameters
train_epochs = config.cfg.TRAIN.EPOCHS
with sess.as_default():
if weights_path is None:
logger.info('Training from scratch')
init = tf.global_variables_initializer()
sess.run(init)
else:
logger.info('Restore model from {:s}'.format(weights_path))
saver.restore(sess=sess, save_path=weights_path)
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
for epoch in range(train_epochs):
_, c, seq_distance, preds, gt_labels, summary = sess.run([
optimizer, cost, sequence_dist, decoded, input_labels,
merge_summary_op
])
# calculate the precision
preds = decoder.sparse_tensor_to_str(preds[0])
gt_labels = decoder.sparse_tensor_to_str(gt_labels)
accuracy = []
for index, gt_label in enumerate(gt_labels):
pred = preds[index]
totol_count = len(gt_label)
correct_count = 0
try:
for i, tmp in enumerate(gt_label):
if tmp == pred[i]:
correct_count += 1
except IndexError:
continue
finally:
try:
accuracy.append(correct_count / totol_count)
except ZeroDivisionError:
if len(pred) == 0:
accuracy.append(1)
else:
accuracy.append(0)
accuracy = np.mean(np.array(accuracy).astype(np.float32), axis=0)
#
if epoch % config.cfg.TRAIN.DISPLAY_STEP == 0:
logger.info(
'Epoch: {:d} cost= {:9f} seq distance= {:9f} train accuracy= {:9f}'
.format(epoch + 1, c, seq_distance, accuracy))
summary_writer.add_summary(summary=summary, global_step=epoch)
saver.save(sess=sess, save_path=model_save_path, global_step=epoch)
coord.request_stop()
coord.join(threads=threads)
sess.close()
return
def train_shadownet(cfg: EasyDict,
weights_path: str = None,
decode: bool = False,
num_threads: int = 4):
"""
:param cfg: configuration EasyDict (e.g. global_config.config.cfg)
:param weights_path: Path to stored weights
:param decode: Whether to perform CTC decoding to report progress during training
:param num_threads: Number of threads to use in tf.train.shuffle_batch
"""
# decode the tf records to get the training data
decoder = data_utils.TextFeatureIO(
char_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR, 'char_dict.json'),
ord_map_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR,
'ord_map.json')).reader
images, labels, imagenames = decoder.read_features(
ops.join(cfg.PATH.TFRECORDS_DIR, 'train_feature.tfrecords'),
num_epochs=None,
input_size=cfg.ARCH.INPUT_SIZE,
input_channels=cfg.ARCH.INPUT_CHANNELS)
inputdata, input_labels, input_imagenames = tf.train.shuffle_batch(
tensors=[images, labels, imagenames],
batch_size=cfg.TRAIN.BATCH_SIZE,
capacity=1000 + 2 * cfg.TRAIN.BATCH_SIZE,
min_after_dequeue=100,
num_threads=num_threads)
inputdata = tf.cast(x=inputdata, dtype=tf.float32)
# initialise the net model
shadownet = crnn_model.ShadowNet(phase='Train',
hidden_nums=cfg.ARCH.HIDDEN_UNITS,
layers_nums=cfg.ARCH.HIDDEN_LAYERS,
num_classes=len(decoder.char_dict) + 1)
with tf.variable_scope('shadow', reuse=False):
net_out = shadownet.build_shadownet(inputdata=inputdata)
cost = tf.reduce_mean(
tf.nn.ctc_loss(labels=input_labels,
inputs=net_out,
sequence_length=cfg.ARCH.SEQ_LENGTH *
np.ones(cfg.TRAIN.BATCH_SIZE)))
decoded, log_prob = tf.nn.ctc_beam_search_decoder(
net_out,
cfg.ARCH.SEQ_LENGTH * np.ones(cfg.TRAIN.BATCH_SIZE),
merge_repeated=False)
sequence_dist = tf.reduce_mean(
tf.edit_distance(tf.cast(decoded[0], tf.int32), input_labels))
global_step = tf.Variable(0, name='global_step', trainable=False)
starter_learning_rate = cfg.TRAIN.LEARNING_RATE
learning_rate = tf.train.exponential_decay(starter_learning_rate,
global_step,
cfg.TRAIN.LR_DECAY_STEPS,
cfg.TRAIN.LR_DECAY_RATE,
staircase=True)
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
optimizer = tf.train.AdadeltaOptimizer(
learning_rate=learning_rate).minimize(loss=cost,
global_step=global_step)
# Set tf summary
os.makedirs(cfg.PATH.TBOARD_SAVE_DIR, exist_ok=True)
tf.summary.scalar(name='Cost', tensor=cost)
tf.summary.scalar(name='Learning_Rate', tensor=learning_rate)
tf.summary.scalar(name='Seq_Dist', tensor=sequence_dist)
merge_summary_op = tf.summary.merge_all()
# Set saver configuration
saver = tf.train.Saver()
os.makedirs(cfg.PATH.TBOARD_SAVE_DIR, exist_ok=True)
train_start_time = time.strftime('%Y-%m-%d-%H-%M-%S',
time.localtime(time.time()))
model_name = 'shadownet_{:s}.ckpt'.format(str(train_start_time))
model_save_path = ops.join(cfg.PATH.MODEL_SAVE_DIR, model_name)
# Set sess configuration
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = cfg.TRAIN.TF_ALLOW_GROWTH
sess = tf.Session(config=sess_config)
summary_writer = tf.summary.FileWriter(cfg.PATH.TBOARD_SAVE_DIR)
summary_writer.add_graph(sess.graph)
# Set the training parameters
train_epochs = cfg.TRAIN.EPOCHS
with sess.as_default():
if weights_path is None:
logger.info('Training from scratch')
init = tf.global_variables_initializer()
sess.run(init)
else:
logger.info('Restore model from {:s}'.format(weights_path))
saver.restore(sess=sess, save_path=weights_path)
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
for epoch in range(train_epochs):
if decode:
_, c, seq_distance, predictions, labels, summary = sess.run([
optimizer, cost, sequence_dist, decoded, input_labels,
merge_summary_op
])
labels = decoder.sparse_tensor_to_str(labels)
predictions = decoder.sparse_tensor_to_str(predictions[0])
accuracy = compute_accuracy(labels, predictions)
if epoch % cfg.TRAIN.DISPLAY_STEP == 0:
logger.info(
'Epoch: {:d} cost= {:9f} seq distance= {:9f} train accuracy= {:9f}'
.format(epoch + 1, c, seq_distance, accuracy))
else:
_, c, summary = sess.run([optimizer, cost, merge_summary_op])
if epoch % cfg.TRAIN.DISPLAY_STEP == 0:
logger.info('Epoch: {:d} cost= {:9f}'.format(epoch + 1, c))
summary_writer.add_summary(summary=summary, global_step=epoch)
saver.save(sess=sess, save_path=model_save_path, global_step=epoch)
coord.request_stop()
coord.join(threads=threads)
def recognize(image_path: str,
weights_path: str,
cfg: EasyDict,
is_vis: bool = True,
num_classes: int = 0):
"""
:param image_path:
:param weights_path: Path to stored weights
:param cfg:
:param is_vis:
:param num_classes:
"""
image = cv2.imread(image_path, cv2.IMREAD_COLOR)
image = cv2.resize(image, tuple(cfg.ARCH.INPUT_SIZE))
image = np.expand_dims(image, axis=0).astype(np.float32)
w, h = cfg.ARCH.INPUT_SIZE
inputdata = tf.placeholder(dtype=tf.float32,
shape=[1, h, w, cfg.ARCH.INPUT_CHANNELS],
name='input')
codec = data_utils.TextFeatureIO(
char_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR, 'char_dict.json'),
ord_map_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR, 'ord_map.json'))
num_classes = len(
codec.reader.char_dict) + 1 if num_classes == 0 else num_classes
net = crnn_model.ShadowNet(phase='Test',
hidden_nums=cfg.ARCH.HIDDEN_UNITS,
layers_nums=cfg.ARCH.HIDDEN_LAYERS,
num_classes=num_classes)
with tf.variable_scope('shadow'):
net_out = net.build_shadownet(inputdata=inputdata)
decodes, _ = tf.nn.ctc_beam_search_decoder(
inputs=net_out,
sequence_length=cfg.ARCH.SEQ_LENGTH * np.ones(1),
merge_repeated=False)
# config tf session
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = cfg.TRAIN.TF_ALLOW_GROWTH
# config tf saver
saver = tf.train.Saver()
sess = tf.Session(config=sess_config)
with sess.as_default():
saver.restore(sess=sess, save_path=weights_path)
preds = sess.run(decodes, feed_dict={inputdata: image})
preds = codec.writer.sparse_tensor_to_str(preds[0])
logger.info('Predict image {:s} label {:s}'.format(
ops.split(image_path)[1], preds[0]))
if is_vis:
plt.figure('CRNN Model Demo')
plt.imshow(
cv2.imread(image_path, cv2.IMREAD_COLOR)[:, :, (2, 1, 0)])
plt.show()
sess.close()
def train_shadownet():
"""
:param dataset_dir:
:param weights_path:
:return:
"""
# input_tensor = tf.placeholder(dtype=tf.float32, shape=[config.cfg.TRAIN.BATCH_SIZE, 32, 100, 3],
# name='input_tensor')
# decode the tf records to get the training data
decoder = data_utils.TextFeatureIO().reader
images, labels, imagenames = decoder.read_features(FLAGS.dataset_dir,
num_epochs=None,
flag='Train')
# images_val, labels_val, imagenames_val = decoder.read_features(dataset_dir, num_epochs=None,
# flag='Validation')
inputdata, input_labels, input_imagenames = tf.train.shuffle_batch(
tensors=[images, labels, imagenames],
batch_size=config.cfg.TRAIN.BATCH_SIZE,
capacity=1000 + 2 * config.cfg.TRAIN.BATCH_SIZE,
min_after_dequeue=100,
num_threads=1)
# inputdata_val, input_labels_val, input_imagenames_val = tf.train.shuffle_batch(
# tensors=[images_val, labels_val, imagenames_val], batch_size=config.TRAIN.BATCH_SIZE,
# capacity=1000 + 2 * config.TRAIN.BATCH_SIZE,
# min_after_dequeue=100, num_threads=1)
inputdata = tf.cast(x=inputdata, dtype=tf.float32)
phase_tensor = tf.placeholder(dtype=tf.string, shape=None, name='phase')
accuracy_tensor = tf.placeholder(dtype=tf.float32,
shape=None,
name='accuracy_tensor')
# initialize the net model
shadownet = crnn_model.ShadowNet(phase=phase_tensor,
hidden_nums=256,
layers_nums=2,
seq_length=15,
num_classes=config.cfg.TRAIN.CLASSES_NUMS,
rnn_cell_type='lstm')
with tf.variable_scope('shadow', reuse=False):
net_out, tensor_dict = shadownet.build_shadownet(inputdata=inputdata)
cost = tf.reduce_mean(
tf.nn.ctc_loss(labels=input_labels,
inputs=net_out,
sequence_length=20 *
np.ones(config.cfg.TRAIN.BATCH_SIZE)))
decoded, log_prob = tf.nn.ctc_beam_search_decoder(
net_out,
20 * np.ones(config.cfg.TRAIN.BATCH_SIZE),
merge_repeated=False)
sequence_dist = tf.reduce_mean(
tf.edit_distance(tf.cast(decoded[0], tf.int32), input_labels))
global_step = tf.Variable(0, name='global_step', trainable=False)
starter_learning_rate = config.cfg.TRAIN.LEARNING_RATE
learning_rate = tf.train.exponential_decay(starter_learning_rate,
global_step,
config.cfg.TRAIN.LR_DECAY_STEPS,
config.cfg.TRAIN.LR_DECAY_RATE,
staircase=True)
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
optimizer = tf.train.AdadeltaOptimizer(
learning_rate=learning_rate).minimize(loss=cost,
global_step=global_step)
# optimizer = tf.train.MomentumOptimizer(learning_rate=learning_rate, momentum=0.9).minimize(
# loss=cost, global_step=global_step)
# Set tf summary
tboard_save_path = '/data/output/'
if not ops.exists(tboard_save_path):
os.makedirs(tboard_save_path)
visualizor = tensorboard_vis_summary.CNNVisualizer()
# training过程summary
train_cost_scalar = tf.summary.scalar(name='train_cost', tensor=cost)
train_accuracy_scalar = tf.summary.scalar(name='train_accuray',
tensor=accuracy_tensor)
train_seq_scalar = tf.summary.scalar(name='train_seq_dist',
tensor=sequence_dist)
train_conv1_image = visualizor.merge_conv_image(
feature_map=tensor_dict['conv1'], scope='conv1_image')
train_conv2_image = visualizor.merge_conv_image(
feature_map=tensor_dict['conv2'], scope='conv2_image')
train_conv3_image = visualizor.merge_conv_image(
feature_map=tensor_dict['conv3'], scope='conv3_image')
train_conv7_image = visualizor.merge_conv_image(
feature_map=tensor_dict['conv7'], scope='conv7_image')
lr_scalar = tf.summary.scalar(name='Learning_Rate', tensor=learning_rate)
weights_tensor_dict = dict()
for vv in tf.trainable_variables():
if 'conv' in vv.name:
weights_tensor_dict[vv.name[:-2]] = vv
train_weights_hist_dict = visualizor.merge_weights_hist(
weights_tensor_dict=weights_tensor_dict,
scope='weights_histogram',
is_merge=False)
train_summary_merge_list = [
train_cost_scalar, train_accuracy_scalar, train_seq_scalar, lr_scalar,
train_conv1_image, train_conv2_image, train_conv3_image
]
for _, weights_hist in train_weights_hist_dict.items():
train_summary_merge_list.append(weights_hist)
train_summary_op_merge = tf.summary.merge(inputs=train_summary_merge_list)
# validation过程summary
# val_cost_scalar = tf.summary.scalar(name='val_cost', tensor=cost)
# val_seq_scalar = tf.summary.scalar(name='val_seq_dist', tensor=sequence_dist)
# val_accuracy_scalar = tf.summary.scalar(name='val_accuracy', tensor=accuracy_tensor)
# test_summary_op_merge = tf.summary.merge(inputs=[val_cost_scalar, val_accuracy_scalar,
# val_seq_scalar])
# Set saver configuration
restore_variable_list = [tmp.name for tmp in tf.trainable_variables()]
saver = tf.train.Saver()
model_save_dir = '/data/output'
if not ops.exists(model_save_dir):
os.makedirs(model_save_dir)
train_start_time = time.strftime('%Y-%m-%d-%H-%M-%S',
time.localtime(time.time()))
model_name = 'shadownet_{:s}.ckpt'.format(str(train_start_time))
model_save_path = ops.join(model_save_dir, model_name)
# Set sess configuration
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = config.cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = config.cfg.TRAIN.TF_ALLOW_GROWTH
sess_config.gpu_options.allocator_type = 'BFC'
sess = tf.Session(config=sess_config)
summary_writer = tf.summary.FileWriter(tboard_save_path)
summary_writer.add_graph(sess.graph)
# Set the training parameters
train_epochs = config.cfg.TRAIN.EPOCHS
print('Global configuration is as follows:')
pprint.pprint(config.cfg)
with sess.as_default():
if FLAGS.weights_path is None:
logger.info('Training from scratch')
init = tf.global_variables_initializer()
sess.run(init)
else:
# logger.info('Restore model from last crnn check point{:s}'.format(weights_path))
# init = tf.global_variables_initializer()
# sess.run(init)
# restore_saver = tf.train.Saver(var_list=restore_variable_list)
# restore_saver.restore(sess=sess, save_path=weights_path)
logger.info('Restore model from last crnn check point{:s}'.format(
FLAGS.weights_path))
saver.restore(sess=sess, save_path=FLAGS.weights_path)
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
for epoch in range(train_epochs):
_, c, seq_distance, preds, gt_labels = sess.run(
[optimizer, cost, sequence_dist, decoded, input_labels],
feed_dict={phase_tensor: 'train'})
# calculate the precision
preds = decoder.sparse_tensor_to_str(preds[0])
gt_labels = decoder.sparse_tensor_to_str(gt_labels)
accuracy = []
for index, gt_label in enumerate(gt_labels):
pred = preds[index]
totol_count = len(gt_label)
correct_count = 0
try:
for i, tmp in enumerate(gt_label):
if tmp == pred[i]:
correct_count += 1
except IndexError:
continue
finally:
try:
accuracy.append(correct_count / totol_count)
except ZeroDivisionError:
if len(pred) == 0:
accuracy.append(1)
else:
accuracy.append(0)
accuracy = np.mean(np.array(accuracy).astype(np.float32), axis=0)
train_summary = sess.run(train_summary_op_merge,
feed_dict={
accuracy_tensor: accuracy,
phase_tensor: 'train'
})
summary_writer.add_summary(summary=train_summary,
global_step=epoch)
if epoch % config.cfg.TRAIN.DISPLAY_STEP == 0:
logger.info(
'Epoch: {:d} cost= {:9f} seq distance= {:9f} train accuracy= {:9f}'
.format(epoch + 1, c, seq_distance, accuracy))
# if epoch % config.cfg.TRAIN.VAL_STEP == 0:
# inputdata_value = sess.run(inputdata_val)
# val_c, val_seq, val_preds, val_gt_labels = sess.run([
# cost, sequence_dist, decoded, input_labels_val],
# feed_dict={phase_tensor: 'test',
# input_tensor: inputdata_value})
#
# preds_val = decoder.sparse_tensor_to_str(val_preds[0])
# gt_labels_val = decoder.sparse_tensor_to_str(val_gt_labels)
#
# accuracy_val = []
#
# for index, gt_label in enumerate(gt_labels_val):
# pred = preds_val[index]
# totol_count = len(gt_label)
# correct_count = 0
# try:
# for i, tmp in enumerate(gt_label):
# if tmp == pred[i]:
# correct_count += 1
# except IndexError:
# continue
# finally:
# try:
# accuracy_val.append(correct_count / totol_count)
# except ZeroDivisionError:
# if len(pred) == 0:
# accuracy_val.append(1)
# else:
# accuracy_val.append(0)
#
# accuracy_val = np.mean(np.array(accuracy_val).astype(np.float32), axis=0)
#
# test_summary = sess.run(test_summary_op_merge,
# feed_dict={accuracy_tensor: accuracy_val,
# phase_tensor: 'test',
# input_tensor: inputdata_value})
# summary_writer.add_summary(summary=test_summary, global_step=epoch)
#
# logger.info('Epoch: {:d} val_cost= {:9f} val_seq_distance= {:9f} val_accuracy= {:9f}'.format(
# epoch + 1, val_c, val_seq, accuracy_val))
if epoch % 500 == 0:
saver.save(sess=sess,
save_path=model_save_path,
global_step=epoch)
coord.request_stop()
coord.join(threads=threads)
sess.close()
return
def test_shadownet(weights_path: str,
cfg: EasyDict,
visualize: bool,
process_all_data: bool = True,
num_threads: int = 4,
num_classes: int = 0):
"""
:param tfrecords_dir: Directory with test_feature.tfrecords
:param charset_dir: Path to char_dict.json and ord_map.json (generated with write_text_features.py)
:param weights_path: Path to stored weights
:param cfg: configuration EasyDict (e.g. global_config.config.cfg)
:param visualize: whether to display the images
:param process_all_data:
:param num_threads: Number of threads for tf.train.(shuffle_)batch
:param num_classes: Number of different characters in the dataset
"""
decoder = data_utils.TextFeatureIO(
char_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR, 'char_dict.json'),
ord_map_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR,
'ord_map.json')).reader
input_images, input_labels, input_image_names = decoder.read_features(
cfg, cfg.TEST.BATCH_SIZE, num_threads, False)
num_classes = len(
decoder.char_dict) + 1 if num_classes == 0 else num_classes
net = crnn_model.ShadowNet(phase='Test',
hidden_nums=cfg.ARCH.HIDDEN_UNITS,
layers_nums=cfg.ARCH.HIDDEN_LAYERS,
num_classes=num_classes)
with tf.variable_scope('shadow'):
net_out = net.build_shadownet(inputdata=input_images)
decoded, _ = tf.nn.ctc_beam_search_decoder(net_out,
cfg.ARCH.SEQ_LENGTH *
np.ones(cfg.TEST.BATCH_SIZE),
merge_repeated=False)
# config tf session
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = cfg.TRAIN.TF_ALLOW_GROWTH
# config tf saver
saver = tf.train.Saver()
sess = tf.Session(config=sess_config)
test_sample_count = sum(1 for _ in tf.python_io.tf_record_iterator(
ops.join(cfg.PATH.TFRECORDS_DIR, 'test_feature.tfrecords')))
num_iterations = int(math.ceil(test_sample_count / cfg.TEST.BATCH_SIZE)) if process_all_data \
else 1
with sess.as_default():
saver.restore(sess=sess, save_path=weights_path)
print('Start predicting...')
accuracy = 0
for epoch in range(num_iterations):
predictions, images, labels, image_names = sess.run(
[decoded, input_images, input_labels, input_image_names])
image_names = np.reshape(image_names,
newshape=image_names.shape[0])
image_names = [tmp.decode('utf-8') for tmp in image_names]
labels = decoder.sparse_tensor_to_str(labels)
predictions = decoder.sparse_tensor_to_str(predictions[0])
accuracy += compute_accuracy(labels, predictions, display=False)
for index, image in enumerate(images):
print(
'Predict {:s} image with gt label: {:s} **** predicted label: {:s}'
.format(image_names[index], labels[index],
predictions[index]))
# avoid accidentally displaying for the whole dataset
if visualize and not process_all_data:
plt.imshow(image[:, :, (2, 1, 0)])
plt.show()
# We compute a mean of means, so we need the sample sizes to be constant
# (BATCH_SIZE) for this to equal the actual mean
accuracy /= num_iterations
print('Mean test accuracy is {:5f}'.format(accuracy))
def main():
job_id = os.environ['PBS_JOBID']
codec = data_utils.TextFeatureIO(
char_dict_path='app/Config/char_dict.json',
ord_map_dict_path=r'app/Config/ord_map.json')
log.basicConfig(format="[ %(levelname)s ] %(message)s",
level=log.INFO,
stream=sys.stdout)
args = build_argparser().parse_args()
model_xml = args.model
model_bin = os.path.splitext(model_xml)[0] + ".bin"
# Plugin initialization for specified device and load extensions library if specified
plugin = IEPlugin(device=args.device, plugin_dirs=args.plugin_dir)
if args.cpu_extension and 'CPU' in args.device:
plugin.add_cpu_extension(args.cpu_extension)
# Read IR
log.info("Loading network files:\n\t{}\n\t{}".format(model_xml, model_bin))
net = IENetwork(model=model_xml, weights=model_bin)
# if plugin.device == "CPU":
# supported_layers = plugin.get_supported_layers(net)
# not_supported_layers = [l for l in net.layers.keys() if l not in supported_layers]
# if len(not_supported_layers) != 0:
# log.error("Following layers are not supported by the plugin for specified device {}:\n {}".
# format(plugin.device, ', '.join(not_supported_layers)))
# log.error("Please try to specify cpu extensions library path in sample's command line parameters using -l "
# "or --cpu_extension command line argument")
# sys.exit(1)
assert len(
net.inputs.keys()) == 1, "Sample supports only single input topologies"
assert len(
net.outputs) == 1, "Sample supports only single output topologies"
log.info("Preparing input blobs")
input_blob = next(iter(net.inputs))
out_blob = next(iter(net.outputs))
net.batch_size = len(args.input)
job_id = os.environ['PBS_JOBID'].split('.')[0]
# Read and pre-process input images
n, c, h, w = net.inputs[input_blob].shape
images = np.ndarray(shape=(n, c, h, w))
for i in range(n):
image = cv2.imread(args.input[i])
if image.shape[:-1] != (h, w):
log.warning("Image {} is resized from {} to {}".format(
args.input[i], image.shape[:-1], (h, w)))
image = cv2.resize(image, (w, h))
image = image.transpose(
(2, 0, 1)) # Change data layout from HWC to CHW
images[i] = image
log.info("Batch size is {}".format(n))
# Loading model to the plugin
log.info("Loading model to the plugin")
exec_net = plugin.load(network=net)
del net
# Start sync inference
log.info("Starting inference ({} iterations)".format(args.number_iter))
infer_time = []
result_dir = os.path.join(args.output_dir, job_id)
if not os.path.isdir(result_dir):
print(result_dir)
os.makedirs(result_dir, exist_ok=True)
progress_file_path = os.path.join(result_dir, 'i_progress.txt')
t0 = time()
for i in range(args.number_iter):
#t0 = time()
res = exec_net.infer(inputs={input_blob: images})
#infer_time.append((time()-t0)*1000)
print(i, args.number_iter)
progressUpdate(progress_file_path,
time() - t0, i + 1, args.number_iter)
t1 = (time() - t0)
log.info("Average running time of one iteration: {} ms".format(
np.average(np.asarray(infer_time))))
if args.perf_counts:
perf_counts = exec_net.requests[0].get_perf_counts()
log.info("Performance counters:")
print("{:<70} {:<15} {:<15} {:<15} {:<10}".format(
'name', 'layer_type', 'exet_type', 'status', 'real_time, us'))
for layer, stats in perf_counts.items():
print("{:<70} {:<15} {:<15} {:<15} {:<10}".format(
layer, stats['layer_type'], stats['exec_type'],
stats['status'], stats['real_time']))
# Processing output blob
log.info("Processing output blob")
res = res[out_blob]
preds = res.argmax(2)
preds = preds.transpose(1, 0)
preds = np.ascontiguousarray(preds, dtype=np.int8).view(dtype=np.int8)
values = codec.writer.ordtochar(preds[0].tolist())
values = [v for i, v in enumerate(values) if i == 0 or v != values[i - 1]]
values = [x for x in values if x != ' ']
res = ''.join(values)
print("The result is : " + res)
avg_time = round((t1 * 1000 / args.number_iter), 3)
with open(os.path.join(args.output_dir, job_id, 'result.txt'), 'w') as f:
f.write(res + "\n Inference performed in " + str(avg_time) + "ms")
stats = {}
stats['time'] = str(round(t1, 1))
stats['frames'] = str(args.number_iter * n)
stats['fps'] = str(args.number_iter * n / t1)
stats_file = result_dir + "/stats.json"
with open(stats_file, 'w') as f:
json.dump(stats, f)
del exec_net
del plugin
def write_features(dataset_dir, save_dir, anno_name):
"""
:param dataset_dir:
:param save_dir:
:return:
"""
if not ops.exists(save_dir):
os.makedirs(save_dir)
print('Initialize the dataset provider ......')
provider = data_provider.TextDataProvider(dataset_dir=dataset_dir,
annotation_name=anno_name,
validation_set=True,
validation_split=0.001,
shuffle=None,
normalization=None)
print('Dataset provider intialize complete')
feature_io = data_utils.TextFeatureIO()
# write train tfrecords
print('Start writing training tf records')
train_images_temp = provider.train.images
train_image_widths = provider.train.image_widths
train_images = []
for index, image in enumerate(train_images_temp):
train_images.append(
bytes(list(np.reshape(image, [train_image_width * 32 * 3]))))
print(len(train_images))
train_labels = provider.train.labels
train_imagenames = provider.train.imagenames
train_tfrecord_path = ops.join(save_dir, anno_name[:-4] +
'.tfrecords') # 'train_feature.tfrecords'
train_class_num = feature_io.writer.write_features(
tfrecords_path=train_tfrecord_path,
labels=train_labels,
images=train_images,
imagenames=train_imagenames,
image_widths=train_image_widths)
print('training class_num: ', train_class_num)
# # write test tfrecords
# print('Start writing testing tf records')
# test_images_temp = provider.test.images
# test_image_widths = provider.test.image_widths
# test_images = []
# for index, image in enumerate(test_images_temp):
# test_images.append(bytes(list(np.reshape(image, [train_image_width*32*3]))))
# print(len(test_images))
# test_labels = provider.test.labels
# test_imagenames = provider.test.imagenames
# test_tfrecord_path = ops.join(save_dir, 'test_feature.tfrecords')
# test_class_num = feature_io.writer.write_features(
# tfrecords_path=test_tfrecord_path, labels=test_labels, images=test_images, imagenames=test_imagenames,
# image_widths=test_image_widths)
# print('test num_class: ', test_class_num)
# write val tfrecords
# val_images_temp = provider.validation.images
# val_image_widths = provider.validation.image_widths
# val_images = []
# for index, image in enumerate(val_images_temp):
# val_images.append(bytes(list(np.reshape(image, [train_image_width*32*3]))))
# print(len(val_images))
# val_labels = provider.validation.labels
# val_imagenames = provider.validation.imagenames
# val_tfrecord_path = ops.join(save_dir, 'validation_feature.tfrecords')
# val_class_num = feature_io.writer.write_features(
# tfrecords_path=val_tfrecord_path, labels=val_labels, images=val_images, imagenames=val_imagenames,
# image_widths=val_image_widths)
# print('val num_class: ', val_class_num)
return
def test_shadownet(dataset_dir, weights_path, is_vis=True):
"""
:param dataset_dir:
:param weights_path:
:param is_vis:
:return:
"""
# Initialize the record decoder
decoder = data_utils.TextFeatureIO().reader
images_t, labels_t, imagenames_t = decoder.read_features(ops.join(
dataset_dir, 'test_feature.tfrecords'),
num_epochs=None)
images_sh, labels_sh, imagenames_sh = tf.train.shuffle_batch(
tensors=[images_t, labels_t, imagenames_t],
batch_size=32,
capacity=1000 + 32 * 2,
min_after_dequeue=2,
num_threads=4)
images_sh = tf.cast(x=images_sh, dtype=tf.float32)
# build shadownet
net = crnn_model.ShadowNet(phase='Test',
hidden_nums=256,
layers_nums=2,
seq_length=25,
num_classes=37)
with tf.variable_scope('shadow'):
net_out = net.build_shadownet(inputdata=images_sh)
decoded, _ = tf.nn.ctc_beam_search_decoder(net_out,
25 * np.ones(32),
merge_repeated=False)
# config tf session
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = config.cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = config.cfg.TRAIN.TF_ALLOW_GROWTH
# config tf saver
saver = tf.train.Saver()
sess = tf.Session(config=sess_config)
with sess.as_default():
# restore the model weights
saver.restore(sess=sess, save_path=weights_path)
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
print('Start predicting ......')
predictions, images, labels, imagenames = sess.run(
[decoded, images_sh, labels_sh, imagenames_sh])
imagenames = np.reshape(imagenames, newshape=imagenames.shape[0])
imagenames = [tmp.decode('utf-8') for tmp in imagenames]
preds_res = decoder.sparse_tensor_to_str(predictions[0])
gt_res = decoder.sparse_tensor_to_str(labels)
for index, image in enumerate(images):
print(
'Predict {:s} image with gt label: {:s} **** predict label: {:s}'
.format(imagenames[index], gt_res[index], preds_res[index]))
if is_vis:
plt.imshow(image[:, :, (2, 1, 0)])
plt.show()
coord.request_stop()
coord.join(threads=threads)
sess.close()
return
def train_shadownet(cfg: EasyDict,
weights_path: str = None,
decode: bool = False,
num_threads: int = 4) -> np.array:
"""
:param cfg: configuration EasyDict (e.g. global_config.config.cfg)
:param weights_path: Path to stored weights
:param decode: Whether to perform CTC decoding to report progress during training
:param num_threads: Number of threads to use in tf.train.shuffle_batch
:return History of values of the cost function
"""
# decode the tf records to get the training data
decoder = data_utils.TextFeatureIO(
char_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR, 'char_dict.json'),
ord_map_dict_path=ops.join(cfg.PATH.CHAR_DICT_DIR,
'ord_map.json')).reader
input_images, input_labels, input_image_names = decoder.read_features(
cfg, cfg.TRAIN.BATCH_SIZE, num_threads)
shadownet = crnn_model.ShadowNet(phase='Train',
hidden_nums=cfg.ARCH.HIDDEN_UNITS,
layers_nums=cfg.ARCH.HIDDEN_LAYERS,
num_classes=len(decoder.char_dict) + 1)
with tf.variable_scope('shadow', reuse=False):
net_out = shadownet.build_shadownet(inputdata=input_images)
cost = tf.reduce_mean(
tf.nn.ctc_loss(labels=input_labels,
inputs=net_out,
sequence_length=cfg.ARCH.SEQ_LENGTH *
np.ones(cfg.TRAIN.BATCH_SIZE)))
decoded, log_prob = tf.nn.ctc_beam_search_decoder(
net_out,
cfg.ARCH.SEQ_LENGTH * np.ones(cfg.TRAIN.BATCH_SIZE),
merge_repeated=False)
sequence_dist = tf.reduce_mean(
tf.edit_distance(tf.cast(decoded[0], tf.int32), input_labels))
global_step = tf.Variable(0, name='global_step', trainable=False)
starter_learning_rate = cfg.TRAIN.LEARNING_RATE
learning_rate = tf.train.exponential_decay(
starter_learning_rate,
global_step,
cfg.TRAIN.LR_DECAY_STEPS,
cfg.TRAIN.LR_DECAY_RATE,
staircase=cfg.TRAIN.LR_STAIRCASE)
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
optimizer = tf.train.AdadeltaOptimizer(
learning_rate=learning_rate).minimize(loss=cost,
global_step=global_step)
# Set tf summary
os.makedirs(cfg.PATH.TBOARD_SAVE_DIR, exist_ok=True)
tf.summary.scalar(name='Cost', tensor=cost)
tf.summary.scalar(name='Learning_Rate', tensor=learning_rate)
if decode:
tf.summary.scalar(name='Seq_Dist', tensor=sequence_dist)
merge_summary_op = tf.summary.merge_all()
# Set saver configuration
saver = tf.train.Saver()
os.makedirs(cfg.PATH.TBOARD_SAVE_DIR, exist_ok=True)
train_start_time = time.strftime('%Y-%m-%d-%H-%M-%S',
time.localtime(time.time()))
model_name = 'shadownet_{:s}.ckpt'.format(str(train_start_time))
model_save_path = ops.join(cfg.PATH.MODEL_SAVE_DIR, model_name)
# Set sess configuration
sess_config = tf.ConfigProto()
sess_config.gpu_options.per_process_gpu_memory_fraction = cfg.TRAIN.GPU_MEMORY_FRACTION
sess_config.gpu_options.allow_growth = cfg.TRAIN.TF_ALLOW_GROWTH
sess = tf.Session(config=sess_config)
summary_writer = tf.summary.FileWriter(cfg.PATH.TBOARD_SAVE_DIR)
summary_writer.add_graph(sess.graph)
# Set the training parameters
train_epochs = cfg.TRAIN.EPOCHS
with sess.as_default():
if weights_path is None:
logger.info('Training from scratch')
init = tf.global_variables_initializer()
sess.run(init)
else:
logger.info('Restore model from {:s}'.format(weights_path))
saver.restore(sess=sess, save_path=weights_path)
patience_counter = 1
cost_history = [np.inf]
for epoch in range(train_epochs):
if epoch > 1 and cfg.TRAIN.EARLY_STOPPING:
# We always compare to the first point where cost didn't improve
if cost_history[-1 - patience_counter] - cost_history[
-1] > cfg.TRAIN.PATIENCE_DELTA:
patience_counter = 1
else:
patience_counter += 1
if patience_counter > cfg.TRAIN.PATIENCE_EPOCHS:
logger.info(
"Cost didn't improve beyond {:f} for {:d} epochs, stopping early."
.format(cfg.TRAIN.PATIENCE_DELTA, patience_counter))
break
if decode:
_, c, seq_distance, predictions, labels, summary = sess.run([
optimizer, cost, sequence_dist, decoded, input_labels,
merge_summary_op
])
labels = decoder.sparse_tensor_to_str(labels)
predictions = decoder.sparse_tensor_to_str(predictions[0])
accuracy = compute_accuracy(labels, predictions)
if epoch % cfg.TRAIN.DISPLAY_STEP == 0:
logger.info(
'Epoch: {:d} cost= {:9f} seq distance= {:9f} train accuracy= {:9f}'
.format(epoch + 1, c, seq_distance, accuracy))
else:
_, c, summary = sess.run([optimizer, cost, merge_summary_op])
if epoch % cfg.TRAIN.DISPLAY_STEP == 0:
logger.info('Epoch: {:d} cost= {:9f}'.format(epoch + 1, c))
cost_history.append(c)
summary_writer.add_summary(summary=summary, global_step=epoch)
saver.save(sess=sess, save_path=model_save_path, global_step=epoch)
return np.array(cost_history[1:]) # Don't return the first np.inf
