Source code for mmselfsup.core.hooks.simsiam_hook
# Copyright (c) OpenMMLab. All rights reserved.
from mmcv.runner import HOOKS, Hook
[docs]@HOOKS.register_module()
class SimSiamHook(Hook):
"""Hook for SimSiam.
This hook is for SimSiam to fix learning rate of predictor.
Args:
fix_pred_lr (bool): whether to fix the lr of predictor or not.
lr (float): the value of fixed lr.
adjust_by_epoch (bool, optional): whether to set lr by epoch or iter.
Defaults to True.
"""
def __init__(self, fix_pred_lr, lr, adjust_by_epoch=True, **kwargs):
self.fix_pred_lr = fix_pred_lr
self.lr = lr
self.adjust_by_epoch = adjust_by_epoch
def before_train_iter(self, runner):
if self.adjust_by_epoch:
return
else:
if self.fix_pred_lr:
for param_group in runner.optimizer.param_groups:
if 'fix_lr' in param_group and param_group['fix_lr']:
param_group['lr'] = self.lr
[docs] def before_train_epoch(self, runner):
"""fix lr of predictor."""
if self.fix_pred_lr:
for param_group in runner.optimizer.param_groups:
if 'fix_lr' in param_group and param_group['fix_lr']:
param_group['lr'] = self.lr