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54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from typing import cast
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import torch
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from database import db_manager
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from datasets import Dataset, load_dataset
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from tqdm.auto import tqdm
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from transformers import AutoImageProcessor, AutoModel
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@torch.no_grad()
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def establish_database(processor, model, images, labels, batch_size=64):
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device = model.device
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model.eval()
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for i in tqdm(range(0, len(images), batch_size)):
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batch_imgs = images[i : i + batch_size]
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inputs = processor(images=batch_imgs, return_tensors="pt")
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# 迁移数据到GPU
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inputs.to(device, non_blocking=True)
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outputs = model(**inputs)
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# 后处理
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feats = outputs.last_hidden_state # [B, N, D]
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cls_tokens = feats[:, 0] # Get CLS token (first token) for all batch items
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cls_tokens = cast(torch.Tensor, cls_tokens)
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# 迁移输出到CPU
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cls_tokens = cls_tokens.cpu()
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batch_labels = labels[i : i + batch_size]
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actual_batch_size = len(batch_labels)
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# 存库
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db_manager.table.add(
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[
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{"id": i + j, "label": batch_labels[j], "vector": cls_tokens[j].numpy()}
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for j in range(actual_batch_size)
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]
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)
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if __name__ == "__main__":
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train_dataset = load_dataset("uoft-cs/cifar10", split="train")
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train_dataset = cast(Dataset, train_dataset)
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processor = AutoImageProcessor.from_pretrained(
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"facebook/dinov2-large", device_map="cuda"
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)
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model = AutoModel.from_pretrained("facebook/dinov2-large", device_map="cuda")
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establish_database(processor, model, train_dataset["img"], train_dataset["label"])
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