def training_worker_proc(train_session, nnTrainer, trainDirMgr, valDirMgr,
batch_info_csv_filename, num_epochs,
does_resume_training, train_saver, output_dir_path,
checkpoint_dir_path, train_summary_dir_path,
val_summary_dir_path, is_time_major,
is_sparse_output):
print('\t{}: Start training worker process.'.format(os.getpid()))
trainFileBatchLoader = NpzFileBatchLoader(batch_info_csv_filename,
data_processing_functor=None)
valFileBatchLoader = NpzFileBatchLoader(batch_info_csv_filename,
data_processing_functor=None)
#--------------------
start_time = time.time()
with train_session.as_default() as sess:
with sess.graph.as_default():
swl_tf_util.train_neural_net_by_file_batch_loader(
sess, nnTrainer, trainFileBatchLoader, valFileBatchLoader,
trainDirMgr, valDirMgr, num_epochs, does_resume_training,
train_saver, output_dir_path, checkpoint_dir_path,
train_summary_dir_path, val_summary_dir_path, is_time_major,
is_sparse_output)
print('\tTotal training time = {}'.format(time.time() - start_time))
print('\t{}: End training worker process.'.format(os.getpid()))
def training_worker_proc(dirMgr, batch_info_csv_filename, num_epochs):
print('\t{}: Start training worker process.'.format(os.getpid()))
for epoch in range(num_epochs):
print('\t{}: Request a working directory: epoch {}.'.format(
os.getpid(), epoch))
while True:
"""
global_lock.acquire()
try:
dir_path = dirMgr.requestDirectory()
finally:
global_lock.release()
"""
with global_lock:
dir_path = dirMgr.requestDirectory()
if dir_path is not None:
break
else:
time.sleep(0.1)
print('\t{}: Got a working directory: {}.'.format(
os.getpid(), dir_path))
#--------------------
fileBatchLoader = NpzFileBatchLoader(
batch_info_csv_filename=batch_info_csv_filename)
batches = fileBatchLoader.loadBatches(dir_path) # Loads batches.
for idx, (batch_data, num_batch_examples) in enumerate(batches):
# Train with each batch (inputs & outputs).
#print('\t{}: {}, {}, {}'.format(idx, num_batch_examples, batch_data[0].shape, batch_data[1].shape))
print('\t{}: {}, {}-{}, {}-{}'.format(
idx, num_batch_examples, batch_data[0].shape,
np.max(np.reshape(batch_data[0], (batch_data[0].shape[0], -1)),
axis=-1), batch_data[1].shape,
np.max(np.reshape(batch_data[1], (batch_data[1].shape[0], -1)),
axis=-1)))
#--------------------
"""
global_lock.acquire()
try:
dirMgr.returnDirectory(dir_path)
finally:
global_lock.release()
"""
with global_lock:
dirMgr.returnDirectory(dir_path)
print('\t{}: Returned a directory: {}.'.format(os.getpid(), dir_path))
print('\t{}: End training worker process.'.format(os.getpid()))
def main():
#np.random.seed(7)
#--------------------
# Sets parameters.
does_need_training = True
does_resume_training = False
output_dir_prefix = 'synth90k_crnn'
output_dir_suffix = datetime.datetime.now().strftime('%Y%m%dT%H%M%S')
#output_dir_suffix = '20180302T155710'
initial_epoch = 0
# When outputs are not sparse, CRNN model's output shape = (samples, 32, num_classes) and dataset's output shape = (samples, 23, num_classes).
is_sparse_output = True # Fixed.
#is_time_major = False # Fixed.
# NOTE [info] >> Places with the same parameters.
# class Synth90kLabelConverter in ${SWL_PYTHON_HOME}/test/language_processing/synth90k_dataset_test.py.
# class Synth90kPreprocessor.
image_height, image_width, image_channel = 32, 128, 1
max_label_len = 23 # Max length of words in lexicon.
# Label: 0~9 + a~z + A~Z.
#label_characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
# Label: 0~9 + a~z.
label_characters = '0123456789abcdefghijklmnopqrstuvwxyz'
SOS = '<SOS>' # All strings will start with the Start-Of-String token.
EOS = '<EOS>' # All strings will end with the End-Of-String token.
#extended_label_list = [SOS] + list(label_characters) + [EOS]
extended_label_list = list(label_characters) + [EOS]
#extended_label_list = list(label_characters)
label_int2char = extended_label_list
label_char2int = {c:i for i, c in enumerate(extended_label_list)}
num_labels = len(extended_label_list)
num_classes = num_labels + 1 # extended labels + blank label.
# NOTE [info] >> The largest value (num_classes - 1) is reserved for the blank label.
blank_label = num_classes - 1
label_eos_token = label_char2int[EOS]
#label_eos_token = blank_label
batch_size = 256 # Number of samples per gradient update.
num_epochs = 100 # Number of times to iterate over training data.
shuffle = True
augmenter = ImgaugAugmenter()
#augmenter = create_imgaug_augmenter() # If imgaug augmenter is used, data are augmented in background augmentation processes. (faster)
is_output_augmented = False
#use_multiprocessing = True # Fixed. Batch generators & loaders are used in case of multiprocessing.
#use_file_batch_loader = True # Fixed. It is not related to multiprocessing.
num_loaded_files_at_a_time = 5
num_processes = 5
train_batch_dir_path_prefix = './train_batch_dir'
num_train_batch_dirs = 10
val_batch_dir_path_prefix = './val_batch_dir'
num_val_batch_dirs = 1
test_batch_dir_path_prefix = './test_batch_dir'
num_test_batch_dirs = 1
batch_info_csv_filename = 'batch_info.csv'
sess_config = tf.ConfigProto()
#sess_config.device_count = {'GPU': 2}
#sess_config.allow_soft_placement = True
sess_config.log_device_placement = True
sess_config.gpu_options.allow_growth = True
#sess_config.gpu_options.per_process_gpu_memory_fraction = 0.4 # Only allocate 40% of the total memory of each GPU.
#--------------------
# Prepares multiprocessing.
# set_start_method() should not be used more than once in the program.
#mp.set_start_method('spawn')
BaseManager.register('WorkingDirectoryManager', WorkingDirectoryManager)
BaseManager.register('TwoStepWorkingDirectoryManager', TwoStepWorkingDirectoryManager)
BaseManager.register('NpzFileBatchGeneratorFromNpyFiles', NpzFileBatchGeneratorFromNpyFiles)
#BaseManager.register('NpzFileBatchLoader', NpzFileBatchLoader)
manager = BaseManager()
manager.start()
lock = mp.Lock()
#lock = mp.Manager().Lock() # TypeError: can't pickle _thread.lock objects.
#--------------------
# Prepares directories.
output_dir_path = os.path.join('.', '{}_{}'.format(output_dir_prefix, output_dir_suffix))
checkpoint_dir_path = os.path.join(output_dir_path, 'tf_checkpoint')
inference_dir_path = os.path.join(output_dir_path, 'inference')
train_summary_dir_path = os.path.join(output_dir_path, 'train_log')
val_summary_dir_path = os.path.join(output_dir_path, 'val_log')
swl_util.make_dir(checkpoint_dir_path)
swl_util.make_dir(inference_dir_path)
swl_util.make_dir(train_summary_dir_path)
swl_util.make_dir(val_summary_dir_path)
#--------------------
# Prepares data.
# NOTE [info] >> Generate synth90k dataset using swl.language_processing.synth90k_dataset.save_synth90k_dataset_to_npy_files().
# Refer to ${SWL_PYTHON_HOME}/test/language_processing/synth90k_dataset_test.py.
synth90k_base_dir_path = './synth90k_npy'
train_input_filepaths, train_output_filepaths, val_input_filepaths, val_output_filepaths, test_input_filepaths, test_output_filepaths = load_data(synth90k_base_dir_path)
#--------------------
# Creates models, sessions, and graphs.
# Creates graphs.
if does_need_training:
train_graph = tf.Graph()
eval_graph = tf.Graph()
infer_graph = tf.Graph()
if does_need_training:
with train_graph.as_default():
#K.set_learning_phase(1) # Sets the learning phase to 'train'. (Required)
# Creates a model.
modelForTraining = create_synth90k_crnn(image_height, image_width, image_channel, num_classes, label_eos_token, is_sparse_output)
modelForTraining.create_training_model()
# Creates a trainer.
nnTrainer = SimpleCrnnTrainer(modelForTraining, initial_epoch)
# Creates a saver.
# Saves a model every 2 hours and maximum 5 latest models are saved.
train_saver = tf.train.Saver(max_to_keep=5, keep_checkpoint_every_n_hours=2)
initializer = tf.global_variables_initializer()
with eval_graph.as_default():
#K.set_learning_phase(0) # Sets the learning phase to 'test'. (Required)
# Creates a model.
modelForEvaluation = create_synth90k_crnn(image_height, image_width, image_channel, num_classes, label_eos_token, is_sparse_output)
modelForEvaluation.create_evaluation_model()
# Creates an evaluator.
nnEvaluator = NeuralNetEvaluator(modelForEvaluation)
# Creates a saver.
eval_saver = tf.train.Saver()
with infer_graph.as_default():
#K.set_learning_phase(0) # Sets the learning phase to 'test'. (Required)
# Creates a model.
modelForInference = create_synth90k_crnn(image_height, image_width, image_channel, num_classes, label_eos_token, is_sparse_output)
modelForInference.create_inference_model()
# Creates an inferrer.
nnInferrer = NeuralNetInferrer(modelForInference)
# Creates a saver.
infer_saver = tf.train.Saver()
# Creates sessions.
if does_need_training:
train_session = tf.Session(graph=train_graph, config=sess_config)
eval_session = tf.Session(graph=eval_graph, config=sess_config)
infer_session = tf.Session(graph=infer_graph, config=sess_config)
# Initializes.
if does_need_training:
train_session.run(initializer)
#%%------------------------------------------------------------------
# Trains and evaluates.
if does_need_training:
valDirMgr = WorkingDirectoryManager(val_batch_dir_path_prefix, num_val_batch_dirs)
print('\tWaiting for a validation batch directory...')
while True:
val_dir_path = valDirMgr.requestDirectory()
if val_dir_path is not None:
break
else:
time.sleep(0.1)
print('\tGot a validation batch directory: {}.'.format(val_dir_path))
valFileBatchGenerator = NpzFileBatchGeneratorFromNpyFiles(val_input_filepaths, val_output_filepaths, num_loaded_files_at_a_time, batch_size, False, False, batch_info_csv_filename=batch_info_csv_filename)
num_saved_examples = valFileBatchGenerator.saveBatches(val_dir_path) # Generates and saves batches.
print('\t#saved examples = {}.'.format(num_saved_examples))
valDirMgr.returnDirectory(val_dir_path)
#--------------------
# Multiprocessing (augmentation) + multithreading (training).
trainDirMgr = TwoStepWorkingDirectoryManager(train_batch_dir_path_prefix, num_train_batch_dirs)
training_worker_thread = threading.Thread(target=training_worker_proc, args=(train_session, nnTrainer, trainDirMgr, valDirMgr, batch_info_csv_filename, num_epochs, does_resume_training, train_saver, output_dir_path, checkpoint_dir_path, train_summary_dir_path, val_summary_dir_path, False, is_sparse_output))
training_worker_thread.start()
trainDirMgr_mp = manager.TwoStepWorkingDirectoryManager(train_batch_dir_path_prefix, num_train_batch_dirs)
#valDirMgr_mp = manager.WorkingDirectoryManager(val_batch_dir_path_prefix, num_val_batch_dirs)
#trainFileBatchGenerator_mp = manager.NpzFileBatchGeneratorFromNpyFiles(train_input_filepaths, train_output_filepaths, num_loaded_files_at_a_time, batch_size, shuffle, False, augmenter=augmenter, is_output_augmented=is_output_augmented, batch_info_csv_filename=batch_info_csv_filename)
#trainFileBatchLoader_mp = manager.NpzFileBatchLoader(batch_info_csv_filename, data_processing_functor=Synth90kPreprocessor(is_sparse_output))
#valFileBatchLoader_mp = manager.NpzFileBatchLoader(batch_info_csv_filename, data_processing_functor=Synth90kPreprocessor(is_sparse_output))
#timeout = 10
timeout = None
with mp.Pool(processes=num_processes, initializer=initialize_lock, initargs=(lock,)) as pool:
data_augmentation_results = pool.map_async(partial(augmentation_worker_proc, augmenter, is_output_augmented, batch_info_csv_filename, trainDirMgr_mp, train_input_filepaths, train_output_filepaths, num_loaded_files_at_a_time, batch_size, shuffle, False), [epoch for epoch in range(num_epochs)])
data_augmentation_results.get(timeout)
training_worker_thread.join()
#--------------------
valFileBatchLoader = NpzFileBatchLoader(batch_info_csv_filename, data_processing_functor=Synth90kPreprocessor(is_sparse_output))
start_time = time.time()
with eval_session.as_default() as sess:
with sess.graph.as_default():
swl_tf_util.evaluate_neural_net_by_file_batch_loader(sess, nnEvaluator, valFileBatchLoader, valDirMgr, eval_saver, checkpoint_dir_path, False, False)
print('\tTotal evaluation time = {}'.format(time.time() - start_time))
#%%------------------------------------------------------------------
# Infers.
testDirMgr = WorkingDirectoryManager(test_batch_dir_path_prefix, num_test_batch_dirs)
#--------------------
print('\tWaiting for a test batch directory...')
while True:
test_dir_path = testDirMgr.requestDirectory()
if test_dir_path is not None:
break
else:
time.sleep(0.1)
print('\tGot a test batch directory: {}.'.format(test_dir_path))
testFileBatchGenerator = NpzFileBatchGeneratorFromNpyFiles(test_input_filepaths, test_output_filepaths, num_loaded_files_at_a_time, batch_size, False, False, batch_info_csv_filename=batch_info_csv_filename)
num_saved_examples = testFileBatchGenerator.saveBatches(test_dir_path) # Generates and saves batches.
print('\t#saved examples = {}.'.format(num_saved_examples))
testDirMgr.returnDirectory(test_dir_path)
#--------------------
testFileBatchLoader = NpzFileBatchLoader(batch_info_csv_filename, data_processing_functor=Synth90kPreprocessor(is_sparse_output))
start_time = time.time()
with infer_session.as_default() as sess:
with sess.graph.as_default():
inferences = swl_tf_util.infer_by_neural_net_and_file_batch_loader(sess, nnInferrer, testFileBatchLoader, testDirMgr, infer_saver, checkpoint_dir_path, False)
print('\tTotal inference time = {}'.format(time.time() - start_time))
#--------------------
if inferences is not None:
if num_classes >= 2:
inferences = np.argmax(inferences, -1)
groundtruths = np.argmax(test_labels, -1)
else:
inferences = np.around(inferences)
groundtruths = test_labels
correct_estimation_count = np.count_nonzero(np.equal(inferences, groundtruths))
print('\tAccurary = {} / {} = {}'.format(correct_estimation_count, groundtruths.size, correct_estimation_count / groundtruths.size))
else:
print('[SWL] Warning: Invalid inference results.')
#--------------------
# Closes sessions.
if does_need_training:
train_session.close()
del train_session
eval_session.close()
del eval_session
infer_session.close()
del infer_session
def main():
#np.random.seed(7)
#--------------------
# Sets parameters.
does_need_training = True
does_resume_training = False
output_dir_prefix = 'mnist_cnn'
output_dir_suffix = datetime.datetime.now().strftime('%Y%m%dT%H%M%S')
#output_dir_suffix = '20190127T001424'
initial_epoch = 0
num_classes = 10
input_shape = (None, 28, 28, 1) # 784 = 28 * 28.
output_shape = (None, num_classes)
batch_size = 128 # Number of samples per gradient update.
num_epochs = 30 # Number of times to iterate over training data.
shuffle = True
augmenter = ImgaugAugmenter()
is_output_augmented = False
use_multiprocessing = True # Batch generators & loaders are used in case of multiprocessing.
use_file_batch_loader = True # Is not related to multiprocessing.
num_processes = 5
train_batch_dir_path_prefix = './train_batch_dir'
#train_num_batch_dirs = 5
val_batch_dir_path_prefix = './val_batch_dir'
val_num_batch_dirs = 1
test_batch_dir_path_prefix = './test_batch_dir'
test_num_batch_dirs = 1
batch_info_csv_filename = 'batch_info.csv'
sess_config = tf.ConfigProto()
#sess_config.device_count = {'GPU': 2}
#sess_config.allow_soft_placement = True
sess_config.log_device_placement = True
sess_config.gpu_options.allow_growth = True
#sess_config.gpu_options.per_process_gpu_memory_fraction = 0.4 # Only allocate 40% of the total memory of each GPU.
#--------------------
# Prepares multiprocessing.
if use_multiprocessing:
# set_start_method() should not be used more than once in the program.
#mp.set_start_method('spawn')
BaseManager.register('WorkingDirectoryManager',
WorkingDirectoryManager)
BaseManager.register('TwoStepWorkingDirectoryManager',
TwoStepWorkingDirectoryManager)
BaseManager.register('NpzFileBatchGenerator', NpzFileBatchGenerator)
#BaseManager.register('NpzFileBatchLoader', NpzFileBatchLoader)
manager = BaseManager()
manager.start()
lock = mp.Lock()
#lock= mp.Manager().Lock() # TypeError: can't pickle _thread.lock objects.
#--------------------
# Prepares directories.
output_dir_path = os.path.join(
'.', '{}_{}'.format(output_dir_prefix, output_dir_suffix))
checkpoint_dir_path = os.path.join(output_dir_path, 'tf_checkpoint')
inference_dir_path = os.path.join(output_dir_path, 'inference')
train_summary_dir_path = os.path.join(output_dir_path, 'train_log')
val_summary_dir_path = os.path.join(output_dir_path, 'val_log')
swl_util.make_dir(checkpoint_dir_path)
swl_util.make_dir(inference_dir_path)
swl_util.make_dir(train_summary_dir_path)
swl_util.make_dir(val_summary_dir_path)
#--------------------
# Prepares data.
train_images, train_labels, test_images, test_labels = load_data(
input_shape[1:])
#--------------------
# Creates models, sessions, and graphs.
# Creates graphs.
if does_need_training:
train_graph = tf.Graph()
eval_graph = tf.Graph()
infer_graph = tf.Graph()
if does_need_training:
with train_graph.as_default():
# Creates a model.
modelForTraining = create_mnist_cnn(input_shape, output_shape)
modelForTraining.create_training_model()
# Creates a trainer.
nnTrainer = SimpleNeuralNetTrainer(modelForTraining, initial_epoch)
# Creates a saver.
# Saves a model every 2 hours and maximum 5 latest models are saved.
train_saver = tf.train.Saver(max_to_keep=5,
keep_checkpoint_every_n_hours=2)
initializer = tf.global_variables_initializer()
with eval_graph.as_default():
# Creates a model.
modelForEvaluation = create_mnist_cnn(input_shape, output_shape)
modelForEvaluation.create_evaluation_model()
# Creates an evaluator.
nnEvaluator = NeuralNetEvaluator(modelForEvaluation)
# Creates a saver.
eval_saver = tf.train.Saver()
with infer_graph.as_default():
# Creates a model.
modelForInference = create_mnist_cnn(input_shape, output_shape)
modelForInference.create_inference_model()
# Creates an inferrer.
nnInferrer = NeuralNetInferrer(modelForInference)
# Creates a saver.
infer_saver = tf.train.Saver()
# Creates sessions.
if does_need_training:
train_session = tf.Session(graph=train_graph, config=sess_config)
eval_session = tf.Session(graph=eval_graph, config=sess_config)
infer_session = tf.Session(graph=infer_graph, config=sess_config)
# Initializes.
if does_need_training:
train_session.run(initializer)
#%%------------------------------------------------------------------
# Trains and evaluates.
if does_need_training:
if use_file_batch_loader or use_multiprocessing:
valDirMgr = WorkingDirectoryManager(val_batch_dir_path_prefix,
val_num_batch_dirs)
while True:
val_dir_path = valDirMgr.requestDirectory()
if val_dir_path is not None:
break
else:
time.sleep(0.1)
print(
'\tGot a validation batch directory: {}.'.format(val_dir_path))
valFileBatchGenerator = NpzFileBatchGenerator(
test_images,
test_labels,
batch_size,
False,
False,
batch_info_csv_filename=batch_info_csv_filename)
valFileBatchGenerator.saveBatches(
val_dir_path) # Generates and saves batches.
valDirMgr.returnDirectory(val_dir_path)
if use_multiprocessing:
train_num_batch_dirs = 5
trainDirMgr_mp = manager.TwoStepWorkingDirectoryManager(
train_batch_dir_path_prefix, train_num_batch_dirs)
valDirMgr_mp = manager.WorkingDirectoryManager(
val_batch_dir_path_prefix, val_num_batch_dirs)
#trainFileBatchGenerator_mp = manager.NpzFileBatchGenerator(train_images, train_labels, batch_size, shuffle, False, augmenter=augmenter, is_output_augmented=is_output_augmented, batch_info_csv_filename=batch_info_csv_filename)
#trainFileBatchLoader_mp = manager.NpzFileBatchLoader(batch_info_csv_filename, data_processing_functor=None)
#valFileBatchLoader_mp = manager.NpzFileBatchLoader(batch_info_csv_filename, data_processing_functor=None)
#--------------------
if False:
# Multiprocessing only.
# FIXME [fix] >> This code does not work.
# TensorFlow session and saver cannot be passed to a worker procedure in using multiprocessing.pool.apply_async().
#timeout = 10
timeout = None
with mp.Pool(processes=num_processes,
initializer=initialize_lock,
initargs=(lock, )) as pool:
training_results = pool.apply_async(
training_worker_proc,
args=(train_session, nnTrainer, trainDirMgr_mp,
valDirMgr_mp, batch_info_csv_filename,
num_epochs, does_resume_training, train_saver,
output_dir_path, checkpoint_dir_path,
train_summary_dir_path, val_summary_dir_path,
False, False))
data_augmentation_results = pool.map_async(
partial(augmentation_worker_proc, augmenter,
is_output_augmented, batch_info_csv_filename,
trainDirMgr_mp, train_images, train_labels,
batch_size, shuffle, False),
[epoch for epoch in range(num_epochs)])
training_results.get(timeout)
data_augmentation_results.get(timeout)
else:
# Multiprocessing (augmentation) + multithreading (training).
training_worker_thread = threading.Thread(
target=training_worker_proc,
args=(train_session, nnTrainer, trainDirMgr_mp,
valDirMgr_mp, batch_info_csv_filename, num_epochs,
does_resume_training, train_saver, output_dir_path,
checkpoint_dir_path, train_summary_dir_path,
val_summary_dir_path, False, False))
training_worker_thread.start()
#timeout = 10
timeout = None
with mp.Pool(processes=num_processes,
initializer=initialize_lock,
initargs=(lock, )) as pool:
data_augmentation_results = pool.map_async(
partial(augmentation_worker_proc, augmenter,
is_output_augmented, batch_info_csv_filename,
trainDirMgr_mp, train_images, train_labels,
batch_size, shuffle, False),
[epoch for epoch in range(num_epochs)])
data_augmentation_results.get(timeout)
training_worker_thread.join()
elif use_file_batch_loader:
train_num_batch_dirs = num_epochs
trainDirMgr = WorkingDirectoryManager(train_batch_dir_path_prefix,
train_num_batch_dirs)
# TODO [improve] >> Not-so-good implementation.
# Usaually training is performed for much more epochs, so too many batches have to be generated before training.
for _ in range(train_num_batch_dirs):
while True:
train_dir_path = trainDirMgr.requestDirectory()
if train_dir_path is not None:
break
else:
time.sleep(0.1)
print('\tGot a train batch directory: {}.'.format(
train_dir_path))
trainFileBatchGenerator = NpzFileBatchGenerator(
train_images,
train_labels,
batch_size,
shuffle,
False,
batch_info_csv_filename=batch_info_csv_filename)
trainFileBatchGenerator.saveBatches(
train_dir_path) # Generates and saves batches.
trainDirMgr.returnDirectory(train_dir_path)
#--------------------
trainFileBatchLoader = NpzFileBatchLoader(
batch_info_csv_filename, data_processing_functor=None)
valFileBatchLoader = NpzFileBatchLoader(
batch_info_csv_filename, data_processing_functor=None)
start_time = time.time()
with train_session.as_default() as sess:
with sess.graph.as_default():
swl_tf_util.train_neural_net_by_file_batch_loader(
sess, nnTrainer, trainFileBatchLoader,
valFileBatchLoader, trainDirMgr, valDirMgr, num_epochs,
does_resume_training, train_saver, output_dir_path,
checkpoint_dir_path, train_summary_dir_path,
val_summary_dir_path, False, False)
print('\tTotal training time = {}'.format(time.time() -
start_time))
else:
trainBatchGenerator = SimpleBatchGenerator(train_images,
train_labels,
batch_size, shuffle,
False, augmenter,
is_output_augmented)
valBatchGenerator = SimpleBatchGenerator(test_images, test_labels,
batch_size, False, False)
start_time = time.time()
with train_session.as_default() as sess:
with sess.graph.as_default():
swl_tf_util.train_neural_net_by_batch_generator(
sess, nnTrainer, trainBatchGenerator,
valBatchGenerator, num_epochs, does_resume_training,
train_saver, output_dir_path, checkpoint_dir_path,
train_summary_dir_path, val_summary_dir_path, False,
False)
print('\tTotal training time = {}'.format(time.time() -
start_time))
#--------------------
if use_file_batch_loader:
valFileBatchLoader = NpzFileBatchLoader(
batch_info_csv_filename, data_processing_functor=None)
start_time = time.time()
with eval_session.as_default() as sess:
with sess.graph.as_default():
swl_tf_util.evaluate_neural_net_by_file_batch_loader(
sess, nnEvaluator, valFileBatchLoader, valDirMgr,
eval_saver, checkpoint_dir_path, False, False)
print('\tTotal evaluation time = {}'.format(time.time() -
start_time))
else:
valBatchGenerator = SimpleBatchGenerator(test_images, test_labels,
batch_size, False, False)
start_time = time.time()
with eval_session.as_default() as sess:
with sess.graph.as_default():
swl_tf_util.evaluate_neural_net_by_batch_generator(
sess, nnEvaluator, valBatchGenerator, eval_saver,
checkpoint_dir_path, False, False)
print('\tTotal evaluation time = {}'.format(time.time() -
start_time))
#%%------------------------------------------------------------------
# Infers.
if use_file_batch_loader:
testDirMgr = WorkingDirectoryManager(test_batch_dir_path_prefix,
test_num_batch_dirs)
#--------------------
while True:
test_dir_path = testDirMgr.requestDirectory()
if test_dir_path is not None:
break
else:
time.sleep(0.1)
print('\tGot a test batch directory: {}.'.format(test_dir_path))
testFileBatchGenerator = NpzFileBatchGenerator(
test_images,
test_labels,
batch_size,
False,
False,
batch_info_csv_filename=batch_info_csv_filename)
testFileBatchGenerator.saveBatches(
test_dir_path) # Generates and saves batches.
testDirMgr.returnDirectory(test_dir_path)
#--------------------
testFileBatchLoader = NpzFileBatchLoader(batch_info_csv_filename,
data_processing_functor=None)
start_time = time.time()
with infer_session.as_default() as sess:
with sess.graph.as_default():
inferences = swl_tf_util.infer_by_neural_net_and_file_batch_loader(
sess, nnInferrer, testFileBatchLoader, testDirMgr,
infer_saver, checkpoint_dir_path, False)
print('\tTotal inference time = {}'.format(time.time() - start_time))
else:
testBatchGenerator = SimpleBatchGenerator(test_images, test_labels,
batch_size, False, False)
start_time = time.time()
with infer_session.as_default() as sess:
with sess.graph.as_default():
inferences = swl_tf_util.infer_by_neural_net_and_batch_generator(
sess, nnInferrer, testBatchGenerator, infer_saver,
checkpoint_dir_path, False)
print('\tTotal inference time = {}'.format(time.time() - start_time))
if inferences is not None:
inferences = np.vstack(inferences)
if num_classes >= 2:
inferences = np.argmax(inferences, -1)
groundtruths = np.argmax(test_labels, -1)
else:
inferences = np.around(inferences)
groundtruths = test_labels
correct_estimation_count = np.count_nonzero(
np.equal(inferences, groundtruths))
print('\tAccurary = {} / {} = {}'.format(
correct_estimation_count, groundtruths.size,
correct_estimation_count / groundtruths.size))
else:
print('[SWL] Warning: Invalid inference results.')
#--------------------
# Closes sessions.
if does_need_training:
train_session.close()
del train_session
eval_session.close()
del eval_session
infer_session.close()
del infer_session
def simple_npz_file_batch_generator_from_image_files_and_loader_example():
num_examples = 256
npy_input_filepaths, output_seqs = generate_image_file_dataset(
'./image_files', num_examples)
num_loaded_files = 57
num_epochs = 7
batch_size = 12
shuffle = True
is_time_major = False
batch_dir_path_prefix = './batch_dir'
num_batch_dirs = 5
dirMgr = WorkingDirectoryManager(batch_dir_path_prefix, num_batch_dirs)
batch_info_csv_filename = 'batch_info.csv'
#augmenter = augment_identically
#augmenter = IdentityAugmenter()
augmenter = ImgaugAugmenter()
is_output_augmented = False
#--------------------
for epoch in range(num_epochs):
print('>>>>> Epoch #{}.'.format(epoch))
while True:
dir_path = dirMgr.requestDirectory()
if dir_path is not None:
break
else:
time.sleep(0.1)
print('\t>>>>> Directory: {}.'.format(dir_path))
#fileBatchGenerator = NpzFileBatchGeneratorFromImageFiles(npy_input_filepaths, output_seqs, num_loaded_files, batch_size, shuffle, is_time_major)
fileBatchGenerator = NpzFileBatchGeneratorFromImageFiles(
npy_input_filepaths,
output_seqs,
num_loaded_files,
batch_size,
shuffle,
is_time_major,
augmenter=augmenter,
is_output_augmented=is_output_augmented,
batch_info_csv_filename=batch_info_csv_filename)
num_saved_examples = fileBatchGenerator.saveBatches(
dir_path) # Generates and saves batches.
fileBatchLoader = NpzFileBatchLoader(
batch_info_csv_filename=batch_info_csv_filename)
batches = fileBatchLoader.loadBatches(dir_path) # Loads batches.
#dirMgr.returnDirectory(dir_path) # If dir_path is returned before completing a job, dir_path can be used in a different job.
num_loaded_examples = 0
for idx, (batch_data, num_batch_examples) in enumerate(batches):
# Can run in an individual thread or process.
# Augment each batch (inputs & outputs).
# Train with each batch (inputs & outputs).
#print('\t{}: {}, {}, {}'.format(idx, num_batch_examples, batch_data[0].shape, batch_data[1].shape))
print('\t{}: {}, {}-{}, {}-{}'.format(
idx, num_batch_examples, batch_data[0].shape,
np.max(np.reshape(batch_data[0], (batch_data[0].shape[0], -1)),
axis=-1), batch_data[1].shape,
np.max(np.reshape(batch_data[1], (batch_data[1].shape[0], -1)),
axis=-1)))
num_loaded_examples += num_batch_examples
print('#saved examples =', num_saved_examples)
print('#loaded examples =', num_loaded_examples)
dirMgr.returnDirectory(dir_path)