84 lines
2.0 KiB
Python
84 lines
2.0 KiB
Python
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_base_ = [
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'../_base_/datasets/coco_retrieval.py',
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'../_base_/default_runtime.py',
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]
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# model settings
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model = dict(
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type='BlipRetrieval',
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tokenizer=dict(type='BlipTokenizer', name_or_path='bert-base-uncased'),
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vision_backbone=dict(
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type='VisionTransformer',
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arch='b',
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img_size=384,
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patch_size=16,
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out_type='raw',
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),
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text_backbone=dict(
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type='XBertEncoder',
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med_config=dict(
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architectures=['BertModel'],
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attention_probs_dropout_prob=0.1,
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hidden_act='gelu',
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hidden_dropout_prob=0.1,
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hidden_size=768,
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initializer_range=0.02,
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intermediate_size=3072,
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layer_norm_eps=1e-12,
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max_position_embeddings=512,
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model_type='bert',
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num_attention_heads=12,
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num_hidden_layers=12,
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pad_token_id=0,
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add_type_embeddings=False,
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vocab_size=30524,
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encoder_width=768,
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add_cross_attention=True),
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),
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vision_neck=dict(
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type='Linear',
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in_features=768,
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out_features=256,
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),
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text_neck=dict(
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type='Linear',
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in_features=768,
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out_features=256,
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),
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head=dict(
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type='ITCHead',
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embed_dim=256,
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),
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multimodal_head=dict(
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type='ITMHead',
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hidden_size=768,
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with_pooler=False,
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),
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topk=256,
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max_txt_len=35,
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)
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# optimizer
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optimizer = dict(type='AdamW', lr=2e-5, weight_decay=0.04)
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optim_wrapper = dict(type='OptimWrapper', optimizer=optimizer)
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# learning rate scheduler
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param_scheduler = [dict(type='CosineAnnealingLR', by_epoch=True)]
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# runtime settings
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train_cfg = dict(type='EpochBasedTrainLoop', max_epochs=6)
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val_cfg = dict(type='RetrievalValLoop')
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test_cfg = dict(type='RetrievalTestLoop')
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randomness = dict(seed=42)
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default_hooks = dict(logger=dict(interval=1))
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custom_hooks = [
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dict(
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type='WarmupParamHook',
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param_name='alpha',
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module_name='head',
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warmup_epochs=2)
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]
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