112 lines
3.3 KiB
Python
Executable File
112 lines
3.3 KiB
Python
Executable File
import torch
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from torch.utils.data import DataLoader
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import torchvision
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from data import dataset
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import argparse
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from ignite.utils import convert_tensor
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import time
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from importlib import import_module
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from tqdm import tqdm
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def setup_seed(seed):
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torch.manual_seed(seed)
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torch.cuda.manual_seed_all(seed)
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torch.backends.cudnn.deterministic = True
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def euclidean_dist(x, y):
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"""
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Compute euclidean distance between two tensors
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"""
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# x: B x N x D
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# y: B x M x D
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n = x.size(-2)
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m = y.size(-2)
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d = x.size(-1)
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if d != y.size(-1):
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raise Exception
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x = x.unsqueeze(2).expand(x.size(0), n, m, d) # B x N x M x D
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y = y.unsqueeze(1).expand(x.size(0), n, m, d)
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return torch.pow(x - y, 2).sum(-1)
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def evaluate(query, target, support):
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"""
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:param query: B x NK x D vector
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:param target: B x NK vector
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:param support: B x N x K x D vector
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:return:
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"""
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prototypes = support.mean(-2) # B x N x D
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distance = euclidean_dist(query, prototypes) # B x NK x N
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indices = distance.argmin(-1) # B x NK
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return torch.eq(target, indices).float().mean()
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def test(lmdb_path, import_path):
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dt = torchvision.transforms.Compose([
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torchvision.transforms.CenterCrop(224),
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torchvision.transforms.ToTensor(),
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torchvision.transforms.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
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])
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origin_dataset = dataset.LMDBDataset(lmdb_path, transform=None)
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N = 5
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K = 5
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episodic_dataset = dataset.EpisodicDataset(
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origin_dataset, # 抽取数据集
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N, # N
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K, # K
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100 # 任务数目
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)
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print(episodic_dataset)
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data_loader = DataLoader(episodic_dataset, batch_size=8, pin_memory=False)
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device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
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submit = import_module(f"submit.{import_path}")
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extractor = submit.make_model()
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extractor.to(device)
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accs = []
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with torch.no_grad():
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for item in tqdm(data_loader):
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item = convert_tensor(item, device, non_blocking=True)
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# item["query"]: B x ANK x 3 x W x H
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# item["support"]: B x ANK x 3 x W x H
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# item["target"]: B x NK
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batch_size = item["target"].size(0)
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image_size = item["query"].shape[-3:]
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A = int(item["query"].size(1) / (N * K))
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query_batch = extractor(item["query"].view([-1, *image_size])).view(batch_size, N * K, A, -1)
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support_batch = extractor(item["support"].view([-1, *image_size])).view(batch_size, N, K, A, -1)
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query_batch = torch.mean(query_batch, -2)
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support_batch = torch.mean(support_batch, -2)
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accs.append(evaluate(query_batch, item["target"], support_batch))
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print(torch.tensor(accs).mean().item())
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if __name__ == '__main__':
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setup_seed(100)
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defined_path = [
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"/data/few-shot/lmdb256/dogs.lmdb",
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"/data/few-shot/lmdb256/flowers.lmdb",
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"/data/few-shot/lmdb256/256-object.lmdb",
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"/data/few-shot/lmdb256/dtd.lmdb",
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"/data/few-shot/lmdb256/mini-imagenet-test.lmdb"
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]
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parser = argparse.ArgumentParser(description="test")
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parser.add_argument('-i', "--import_path", required=True)
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args = parser.parse_args()
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for path in defined_path:
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print(path)
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test(path, args.import_path)
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