test v2

data/dataset.py

@@ -1,10 +1,9 @@
 from scipy.io import loadmat
 import torch
+import torchvision
 import lmdb
 import os
 import pickle
-from PIL import Image
-from io import BytesIO
 from torch.utils.data import Dataset
 from torchvision.datasets.folder import default_loader
 from torchvision.datasets import ImageFolder
@@ -44,7 +43,7 @@ class ImprovedImageFolder(ImageFolder):
         assert len(self.classes_list) == len(self.classes)
 
     def __getitem__(self, item):
-        return super().__getitem__(item)[0]
+        return super().__getitem__(item)
 
 
 class LMDBDataset(Dataset):
@@ -61,16 +60,10 @@ class LMDBDataset(Dataset):
 
     def __getitem__(self, i):
         with self.db.begin(write=False) as txn:
-            sample = Image.open(BytesIO(txn.get("{}".format(i).encode())))
+            sample, target = pickle.loads(txn.get("{}".format(i).encode()))
-            if sample.mode != "RGB":
-                sample = sample.convert("RGB")
             if self.transform is not None:
-                try:
                 sample = self.transform(sample)
-                except RuntimeError as re:
+            return sample, target
-                    print(sample.format, sample.size, sample.mode)
-                    raise re
-            return sample
 
 
 class EpisodicDataset(Dataset):
@@ -81,6 +74,20 @@ class EpisodicDataset(Dataset):
         self.num_set = num_set  # K
         self.num_episodes = num_episodes
 
+        self.t0 = torchvision.transforms.Compose([
+            # torchvision.transforms.Resize((224, 224)),
+            torchvision.transforms.CenterCrop(224),
+            torchvision.transforms.ToTensor(),
+            torchvision.transforms.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
+        ])
+
+    def _fetch_list_data(self, id_list):
+        result = []
+        for i in id_list:
+            img = self.origin[i][0]
+            result.extend([self.t0(img)])
+        return result
+
     def __len__(self):
         return self.num_episodes
 
@@ -89,15 +96,20 @@ class EpisodicDataset(Dataset):
         support_set_list = []
         query_set_list = []
         target_list = []
-        for i, c in enumerate(random_classes):
+        for tag, c in enumerate(random_classes):
             image_list = self.origin.classes_list[c]
-            if len(image_list) > self.num_set * 2:
+
+            if len(image_list) >= self.num_set * 2:
+                # have enough images belong to this class
                 idx_list = torch.randperm(len(image_list))[:self.num_set * 2].tolist()
             else:
                 idx_list = torch.randint(high=len(image_list), size=(self.num_set * 2,)).tolist()
-            support_set_list.extend([self.origin[image_list[idx]] for idx in idx_list[:self.num_set]])
+
-            query_set_list.extend([self.origin[image_list[idx]] for idx in idx_list[self.num_set:]])
+            support = self._fetch_list_data(map(image_list.__getitem__, idx_list[:self.num_set]))
-            target_list.extend([i] * self.num_set)
+            query = self._fetch_list_data(map(image_list.__getitem__, idx_list[self.num_set:]))
+            support_set_list.extend(support)
+            query_set_list.extend(query)
+            target_list.extend([tag] * self.num_set)
         return {
             "support": torch.stack(support_set_list),
             "query": torch.stack(query_set_list),

data/lmdbify.py

@@ -1,38 +1,34 @@
 import os
 import pickle
-from io import BytesIO
+from PIL import Image
-import argparse
-
 import lmdb
-from data.dataset import CARS, ImprovedImageFolder
+from data.dataset import ImprovedImageFolder
 from tqdm import tqdm
+import fire
 
 
 def content_loader(path):
-    with open(path, "rb") as f:
+    im = Image.open(path)
-        return f.read()
+    im = im.resize((256, 256))
+    if im.mode != "RGB":
+        im = im.convert("RGB")
+    return im
 
 
 def dataset_to_lmdb(dataset, lmdb_path):
     env = lmdb.open(lmdb_path, map_size=1099511627776*2, subdir=os.path.isdir(lmdb_path))
     with env.begin(write=True) as txn:
         for i in tqdm(range(len(dataset)), ncols=50):
-            txn.put("{}".format(i).encode(), bytearray(dataset[i]))
+            txn.put("{}".format(i).encode(), pickle.dumps(dataset[i]))
         txn.put(b"classes_list", pickle.dumps(dataset.classes_list))
         txn.put(b"__len__", pickle.dumps(len(dataset)))
 
 
 def transform(save_path, dataset_path):
     print(save_path, dataset_path)
-    # origin_dataset = CARS("/data/few-shot/STANFORD-CARS/", loader=content_loader)
     origin_dataset = ImprovedImageFolder(dataset_path, loader=content_loader)
     dataset_to_lmdb(origin_dataset, save_path)
 
 
 if __name__ == '__main__':
-    parser = argparse.ArgumentParser(description="transform dataset to lmdb database")
+    fire.Fire(transform)
-    parser.add_argument('--save', required=True)
-    parser.add_argument('--dataset', required=True)
-    args = parser.parse_args()
-    transform(args.save, args.dataset)
-

test.py

@@ -48,57 +48,53 @@ def evaluate(query, target, support):
 
 
 def test(lmdb_path, import_path):
-    dt = torchvision.transforms.Compose([
+    origin_dataset = dataset.LMDBDataset(lmdb_path, transform=None)
-        torchvision.transforms.Resize((256, 256)),
-        torchvision.transforms.CenterCrop(224),
-        torchvision.transforms.ToTensor(),
-        torchvision.transforms.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
-    ])
-    origin_dataset = dataset.LMDBDataset(lmdb_path, transform=dt)
-    N = 5
-    K = 5
-    episodic_dataset = dataset.EpisodicDataset(
-        origin_dataset,  # 抽取数据集
-        N,  # N
-        K,  # K
-        100  # 任务数目
-    )
-    print(episodic_dataset)
 
-    data_loader = DataLoader(episodic_dataset, batch_size=20, pin_memory=False)
+    device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
-    device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
 
     submit = import_module(f"submit.{import_path}")
 
     extractor = submit.make_model()
     extractor.to(device)
 
-    accs = []
+    batch_size = 10
+    N = 5
+    K = 5
+    episodic_dataset = dataset.EpisodicDataset(origin_dataset, N, K, 100)
+    data_loader = DataLoader(episodic_dataset, batch_size=batch_size, pin_memory=False)
 
     with torch.no_grad():
+        accs = []
         for item in tqdm(data_loader):
             item = convert_tensor(item, device, non_blocking=True)
-            # item["query"]: B x NK x 3 x W x H
+            # item["query"]: B x NKA x 3 x W x H
-            # item["support"]: B x NK x 3 x W x H
+            # item["support"]: B x NKA x 3 x W x H
             # item["target"]: B x NK
-            batch_size = item["target"].size(0)
+            A = item["query"].size(1) // item["target"].size(1)
-            query_batch = extractor(item["query"].view([-1, *item["query"].shape[-3:]])).view(batch_size, N * K, -1)
+            image_size = item["query"].shape[-3:]
-            support_batch = extractor(item["support"].view([-1, *item["query"].shape[-3:]])).view(batch_size, N, K, -1)
+            query_batch = extractor(item["query"].view([-1, *image_size])).view(batch_size, N * K, A, -1)
+            support_batch = extractor(item["support"].view([-1, *image_size])).view(batch_size, N, K, A, -1)
+            query_batch = torch.mean(query_batch, dim=-2)
+            support_batch = torch.mean(support_batch, dim=-2)
+            assert query_batch.shape[:2] == item["target"].shape[:2]
             accs.append(evaluate(query_batch, item["target"], support_batch))
-    print(torch.tensor(accs).mean().item())
+        r = torch.tensor(accs).mean().item()
+        print(lmdb_path, r)
+    return r
 
 
 if __name__ == '__main__':
     setup_seed(100)
     defined_path = [
-                    "/data/few-shot/lmdb/dogs/data.lmdb",
+        "/data/few-shot/lmdb256/dogs.lmdb",
-                    "/data/few-shot/lmdb/flowers/data.lmdb",
+        "/data/few-shot/lmdb256/flowers.lmdb",
-                    "/data/few-shot/lmdb/256-object/data.lmdb",
+        "/data/few-shot/lmdb256/256-object.lmdb",
-                    "/data/few-shot/lmdb/dtd/data.lmdb",
+        "/data/few-shot/lmdb256/dtd.lmdb",
+        "/data/few-shot/lmdb256/cars_train.lmdb",
+        "/data/few-shot/lmdb256/cub.lmdb",
     ]
     parser = argparse.ArgumentParser(description="test")
     parser.add_argument('-i', "--import_path", required=True)
     args = parser.parse_args()
     for path in defined_path:
-        print(path)
         test(path, args.import_path)