class ImageTransform():
    def __init__(self, resize, mean, std):
        self.data_transform = {
            'train': transforms.Compose([
                transforms.RandomResizedCrop(resize, scale=(0.5,1.0)),
                transforms.RandomHorizontalFlip(),
                transforms.ToTensor(),
                transforms.Normalize(mean, std)
            ]),
            'val': transforms.Compose([
                transforms.Resize(256),
                transforms.CenterCrop(resize),
                transforms.ToTensor(),
                transforms.Normalize(mean, std)
            ])
        }

    def __call__(self, img, phase):
        return self.data_transform[phase](img)