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add piecewise decay

This commit is contained in:
littletomatodonkey 2020-08-04 03:43:26 +00:00
parent f7b5edcc72
commit 5e5ea853bf
2 changed files with 16 additions and 5 deletions
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2
ppocr/data/rec/img_tools.py
View File

@ -360,7 +360,7 @@ def process_image(img,
text = char_ops.encode(label)
if len(text) == 0 or len(text) > max_text_length:
logger.info(
"Warning in ppocr/data/rec/img_tools.py:line362: Wrong data type."
"Warning in ppocr/data/rec/img_tools.py: Wrong data type."
"Excepted string with length between 1 and {}, but "
"got '{}'. Label is '{}'".format(max_text_length,
len(text), label))

19
ppocr/optimizer.py
View File

@ -36,17 +36,28 @@ def AdamDecay(params, parameter_list=None):
l2_decay = params.get("l2_decay", 0.0)
if 'decay' in params:
supported_decay_mode = ["cosine_decay", "piecewise_decay"]
params = params['decay']
decay_mode = params['function']
step_each_epoch = params['step_each_epoch']
total_epoch = params['total_epoch']
assert decay_mode in supported_decay_mode, "Supported decay mode is {}, but got {}".format(
supported_decay_mode, decay_mode)
if decay_mode == "cosine_decay":
step_each_epoch = params['step_each_epoch']
total_epoch = params['total_epoch']
base_lr = fluid.layers.cosine_decay(
learning_rate=base_lr,
step_each_epoch=step_each_epoch,
epochs=total_epoch)
else:
logger.info("Only support Cosine decay currently")
elif decay_mode == "piecewise_decay":
boundaries = params["boundaries"]
decay_rate = params["decay_rate"]
values = [
base_lr * decay_rate**idx
for idx in range(len(boundaries) + 1)
]
base_lr = fluid.layers.piecewise_decay(boundaries, values)
optimizer = fluid.optimizer.Adam(
learning_rate=base_lr,
beta1=beta1,