def __getitem__(self, index):
# derive ImageFolder to support slice, list, tuple..., return PIL image(default)
# or tensors(if transform: toTensor)
try:
# equals to if isinstance(index, Number):
return ImageFolder.__getitem__(self, index)[0]
except (ValueError, TypeError):
if isinstance(index, slice):
# tuple_list: [(img, tag), (img, tag)]......
return [
ImageFolder.__getitem__(self, i)[0] for i in range(
super(ExtendedDataset, self).__len__())[index]
]
elif isinstance(index, (tuple, list, np.ndarray, torch.Tensor)):
return [ImageFolder.__getitem__(self, i)[0] for i in index]
# only use [xxx], or tuple(xxx) as in default_collate:
# batch must contain tensors, numpy arrays, numbers, dicts or lists; found <class 'generator'>
else:
raise TypeError(
type_error_msg('index', type(index),
ExtendedDataset.INDEX_LIST))
def __getitem__(self, index):
sample, target = ImageFolder.__getitem__(self, index)
# img_path = self.files[index % len(self.files)]
# Extract image as PyTorch tensor
# img = transforms.ToTensor()(Image.open(img_path))
# Pad to square resolution
img, _ = pad_to_square(sample, 0)
# Resize
img = resize(img, self.img_size)
#return img_path, img
# print("test")
return img, target
# confusion matrix
cm = [[0 for x in range(tgc.network.fc.out_features)]
for y in range(tgc.network.fc.out_features)]
nb_good = 0
nb_bad = 0
tgc.network.eval()
imgn = 0
feature_file = open(args.output, 'wb')
with torch.no_grad():
idx = [i for i in range(0, test.__len__())]
shuffle(idx)
for sample_num in idx:
sample, target = test.__getitem__(sample_num)
print(target)
score = torch.zeros(1, tgc.network.fc.out_features).to(dev)
features = torch.zeros(1, tgc.network.fc.in_features).to(dev)
print(features.size())
for n in range(0, args.count):
sample, target = test.__getitem__(sample_num)
out, _, ap = tgc.network(sample.unsqueeze_(0).to(dev))
ap = ap.view(ap.size(0), -1)
score += out
features += ap
feature_file.write(target.to_bytes(1, byteorder='big',
signed=True))
numpy.save(feature_file, ap.cpu().data.numpy())
_, p = torch.max(score, 1)
def __getitem__(self, idx: int) -> Dict:
image, label = TVImageFolder.__getitem__(self, idx)
return {"img": image, "label": label}
transforms.RandomCrop(size=198, pad_if_needed=True),
transforms.Resize(64),
transforms.RandomHorizontalFlip(0.5),
transforms.RandomVerticalFlip(0.5),
transforms.RandomRotation(90),
transforms.ToTensor()
])
train_dataset = ImageFolder('data/New101/train', transform=transform)
bg_sample = train_dataset.samples[-2012:]
bg_target = train_dataset.targets[-2012:]
train_dataset.samples += 10 * bg_sample
train_dataset.targets += 10 * bg_target
for i in tqdm(range(len(train_dataset))):
train_dataset.__getitem__(i)
val_dataset = ImageFolder('data/New101/val')
for i in tqdm(range(len(val_dataset))):
val_dataset.__getitem__(i)
# print('done')
# numbers = {}
# a = os.listdir('data/New101')
# for cate in a:
# b = os.listdir('data/New101/'+cate)
# numbers[cate]=len(b)
# for img in b:
# if not img.endswith('jpg'):
# print(cate+'/'+img)
'classifier.tgc')):
tgc = TypegroupsClassifier.load(
os.path.join('ocrd_typegroups_classifier', 'models', 'classifier.tgc'))
else:
print('Could not load a model to evaluate')
quit(1)
validation = ImageFolder('lines/validation', transform=None)
validation.target_transform = tgc.classMap.get_target_transform(
validation.class_to_idx)
good = 0
bad = 0
with torch.no_grad():
tgc.network.eval()
for idx in tqdm(range(validation.__len__()), desc='Evaluation'):
sample, target = validation.__getitem__(idx)
path, _ = validation.samples[idx]
if target == -1:
continue
result = tgc.classify(sample, 224, 64, True)
highscore = max(result)
label = tgc.classMap.cl2id[result[highscore]]
if target == label:
good += 1
else:
bad += 1
accuracy = 100 * good / float(good + bad)
print(' Good:', good)
print(' Bad:', bad)
class TinyImageNet(VisionDataset):
def __init__(self, root, train=True, transform=None, target_transform=None):
super().__init__(root, transform=transform,
target_transform=target_transform)
self.train = train
self.__load_classes__(root)
if (train):
self.train_folder = join(root, "train")
self.__prepare_train__(root)
else:
self.test_images_folder = join(root, "val/images")
self.test_annotations_folder = join(root, "val")
self.__prepare_test__(root)
def __load_classes__(self, root):
self.idx_class = Utility.loadFileToArray(root + "/wnids.txt")
self.class_idx = dict((c, i) for i, c in enumerate(self.idx_class))
def __prepare_train__(self, root):
self.trainImageFolder = ImageFolder(self.train_folder)
cidx = self.trainImageFolder.class_to_idx
self.trainImageFolder_idx_to_class = dict((cidx[k], k) for k in cidx)
self.data_size = len(self.trainImageFolder)
def __prepare_test__(self, root):
self.test_images_dict = Utility.load_images_to_dict(self.test_images_folder, "JPEG")
self.test_images_files = list(self.test_images_dict.keys())
self.test_truth_labels = Utility.loadTsvAsDict(join(self.test_annotations_folder, "val_annotations.txt"))
self.test_truth_labels = dict(
(join(self.test_images_folder, f), self.test_truth_labels[f]) for f in self.test_truth_labels)
self.data_size = len(self.test_images_files)
def __getitem__(self, index):
if (self.train):
x, class_y = self.__train_get_item__(index)
else:
x, class_y = self.__test_get_item__(index)
if self.transform:
x = self.transform(x)
y = self.class_idx[class_y]
return x, y
def __train_get_item__(self, index):
x, y = self.trainImageFolder.__getitem__(index)
# Convert y to class
class_y = self.trainImageFolder_idx_to_class[y]
return x, class_y
def __test_get_item__(self, index):
imgFile = self.test_images_files[index]
x = self.test_images_dict[imgFile]
class_y = self.test_truth_labels[imgFile]
return x, class_y
def __len__(self):
return self.data_size
## Hyper-parameter
num_epochs, batch_size, learning_rate = 10, 64, 0.1
## Data Transform
transform = transforms.Compose([transforms.Resize((224, 224)),
transforms.ToTensor(),
transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5)), ])
## Custom Dataset
Train_dataset = ImageFolder(root='./food/train', transform=transform)
Test_dataset = ImageFolder(root='./food/train', transform=transform)
Train_loader = DataLoader(dataset=Train_dataset, shuffle=True, batch_size=batch_size)
# Test_loader = DataLoader(dataset=Test_dataset, shuffle=False, batch_size=batch_size)
## Get the sample data
img = Train_dataset.__getitem__(index=0)[0]
plt.cla()
plt.imshow(img.permute([1,2,0]))
plt.title('sample image')
plt.pause(1)
## Training
criterion = nn.CrossEntropyLoss()
optimizer = torch.optim.SGD(model.parameters(), lr=learning_rate)
for epoch in range(num_epochs):
for i, (images, labels) in enumerate(Train_loader):
outputs = model(images)
loss = criterion(outputs, labels)
optimizer.zero_grad()
loss.backward()