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| # Copyright (c) Lin Song. All rights reserved. | |
| import os | |
| import json | |
| import argparse | |
| import os.path as osp | |
| import torch | |
| import torch.nn.functional as F | |
| from mmengine.config import Config, DictAction | |
| from mmengine.runner import Runner | |
| from mmengine.dataset import Compose | |
| from mmyolo.registry import RUNNERS | |
| def get_caption_embed(runner, caption, prompt_template): | |
| captions = json.load(open(caption, 'r')) | |
| captions = [[prompt_template.format(c[0])] for c in captions] | |
| with torch.no_grad(): | |
| embed = runner.model.backbone.text_model(captions) | |
| embed = F.normalize(embed[:, 0, :], dim=1, p=2) | |
| embed = embed.detach().cpu() | |
| embed = embed[:, :, None, None] | |
| return embed | |
| def convert(runner, caption, checkpoint, prompt_template): | |
| checkpoint = torch.load(checkpoint, map_location='cpu') | |
| state_dict = checkpoint['state_dict'] | |
| embed = get_caption_embed(runner, caption, prompt_template) | |
| import ipdb; ipdb.set_trace() | |
| new_state_dict = {} | |
| for key in list(state_dict.keys()): | |
| if key.startswith('backbone.text_model'): | |
| continue | |
| elif key.startswith('backbone.image_model'): | |
| new_key = key.replace('backbone.image_model', 'backbone') | |
| new_state_dict[new_key] = state_dict[key].clone() | |
| elif key.startswith('bbox_head.head_module.cls_contrasts'): | |
| module_key = '.'.join(key.split('.')[:4]) | |
| logit_scale = state_dict[module_key + '.logit_scale'] | |
| bias = state_dict[module_key + '.bias'] | |
| conv_weight = embed * logit_scale.exp() | |
| conv_bias = bias.repeat(conv_weight.shape[0]) | |
| new_state_dict[module_key + '.conv.weight'] = conv_weight | |
| new_state_dict[module_key + '.conv.bias'] = conv_bias | |
| else: | |
| new_state_dict[key] = state_dict[key].clone() | |
| new_checkpoint = {'state_dict': new_state_dict} | |
| return new_checkpoint | |
| def parse_args(): | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument('config', type=str) | |
| parser.add_argument('checkpoint', type=str) | |
| parser.add_argument('caption', type=str) | |
| parser.add_argument('output', type=str) | |
| parser.add_argument('--prompt-template', type=str, | |
| default='{}') | |
| parser.add_argument( | |
| '--work-dir', | |
| help='the directory to save the file containing evaluation metrics') | |
| parser.add_argument( | |
| '--cfg-options', | |
| nargs='+', | |
| action=DictAction, | |
| help='override some settings in the used config, the key-value pair ' | |
| 'in xxx=yyy format will be merged into config file. If the value to ' | |
| 'be overwritten is a list, it should be like key="[a,b]" or key=a,b ' | |
| 'It also allows nested list/tuple values, e.g. key="[(a,b),(c,d)]" ' | |
| 'Note that the quotation marks are necessary and that no white space ' | |
| 'is allowed.') | |
| args = parser.parse_args() | |
| return args | |
| if __name__ == '__main__': | |
| args = parse_args() | |
| # load config | |
| cfg = Config.fromfile(args.config) | |
| # replace the ${key} with the value of cfg.key | |
| # cfg = replace_cfg_vals(cfg) | |
| if args.cfg_options is not None: | |
| cfg.merge_from_dict(args.cfg_options) | |
| # work_dir is determined in this priority: CLI > segment in file > filename | |
| if args.work_dir is not None: | |
| # update configs according to CLI args if args.work_dir is not None | |
| cfg.work_dir = args.work_dir | |
| elif cfg.get('work_dir', None) is None: | |
| # use config filename as default work_dir if cfg.work_dir is None | |
| cfg.work_dir = osp.join('./work_dirs', | |
| osp.splitext(osp.basename(args.config))[0]) | |
| cfg.load_from = args.checkpoint | |
| # build the runner from config | |
| if 'runner_type' not in cfg: | |
| # build the default runner | |
| runner = Runner.from_cfg(cfg) | |
| else: | |
| # build customized runner from the registry | |
| # if 'runner_type' is set in the cfg | |
| runner = RUNNERS.build(cfg) | |
| runner.call_hook('before_run') | |
| runner.load_or_resume() | |
| pipeline = cfg.test_dataloader.dataset.pipeline | |
| runner.pipeline = Compose(pipeline) | |
| runner.model.eval() | |
| new_checkpoint = convert(runner, args.caption, args.checkpoint, | |
| args.prompt_template) | |
| os.makedirs(os.path.dirname(args.output), exist_ok=True) | |
| torch.save(new_checkpoint, args.output) | |