diff --git a/configs/cyclegan_cityscapes.yaml b/configs/cyclegan_cityscapes.yaml
index f74d9e3bdd35e3a521b3056a5b268f67bba2e406..79b941d4bb46f3cbe939096e8b00872bbcf10e6c 100644
--- a/configs/cyclegan_cityscapes.yaml
+++ b/configs/cyclegan_cityscapes.yaml
@@ -36,16 +36,17 @@ dataset:
     output_nc: 3
     serial_batches: False
     pool_size: 50
-    transform:
-      load_size: 286
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: False
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [286, 286]
+      - name: RandomCrop
+        output_size: [256, 256]
+      - name: RandomHorizontalFlip
+        prob: 0.5
+      - name: Permute
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
   test:
     name: SingleDataset
     dataroot: data/cityscapes/testB
@@ -55,17 +56,13 @@ dataset:
     output_nc: 3
     serial_batches: False
     pool_size: 50
-    transform:
-      load_size: 256
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: True
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
-
+    transforms:
+      - name: Resize
+        size: [256, 256]
+      - name: Permute
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
 
 optimizer:
   name: Adam
diff --git a/configs/cyclegan_horse2zebra.yaml b/configs/cyclegan_horse2zebra.yaml
index 0e845bd5183428f7c166bae300f74757406c07f5..01bb31a7753afafe6d0d47a81d437fe455704625 100644
--- a/configs/cyclegan_horse2zebra.yaml
+++ b/configs/cyclegan_horse2zebra.yaml
@@ -35,16 +35,17 @@ dataset:
     output_nc: 3
     serial_batches: False
     pool_size: 50
-    transform:
-      load_size: 286
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: False
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [286, 286]
+      - name: RandomCrop
+        output_size: [256, 256]
+      - name: RandomHorizontalFlip
+        prob: 0.5
+      - name: Permute
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
   test:
     name: SingleDataset
     dataroot: data/horse2zebra/testA
@@ -55,15 +56,13 @@ dataset:
     serial_batches: False
     pool_size: 50
     transform:
-      load_size: 256
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: True
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+      transform:
+      - name: Resize
+        size: [256, 256]
+      - name: Permute
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
 
 optimizer:
   name: Adam
diff --git a/configs/pix2pix_cityscapes.yaml b/configs/pix2pix_cityscapes.yaml
index 5919ff2e5a5c2c267a9204d117dc7aba5fb245a7..fabb4b404759f1e0b5cc573d69f5ad5a112748e4 100644
--- a/configs/pix2pix_cityscapes.yaml
+++ b/configs/pix2pix_cityscapes.yaml
@@ -33,16 +33,22 @@ dataset:
     output_nc: 3
     serial_batches: False
     pool_size: 0
-    transform:
-      load_size: 286
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: False
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [286, 286]
+        keys: [image, image]
+      - name: PairedRandomCrop
+        output_size: [256, 256]
+        keys: [image, image]
+      - name: PairedRandomHorizontalFlip
+        prob: 0.5
+        keys: [image, image]
+      - name: Permute
+        keys: [image, image]
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
+        keys: [image, image]
   test:
     name: PairedDataset
     dataroot: data/cityscapes/
@@ -53,16 +59,17 @@ dataset:
     output_nc: 3
     serial_batches: True
     pool_size: 50
-    transform:
-      load_size: 256
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: True
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [256, 256]
+        keys: [image, image]
+      - name: Permute
+        keys: [image, image]
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
+        keys: [image, image]
+
 
 optimizer:
   name: Adam
diff --git a/configs/pix2pix_cityscapes_2gpus.yaml b/configs/pix2pix_cityscapes_2gpus.yaml
index 20f494c6fb13690254dd2d047df8c8970615ebff..246599f12d1d921160da3a717cc369b0709027b5 100644
--- a/configs/pix2pix_cityscapes_2gpus.yaml
+++ b/configs/pix2pix_cityscapes_2gpus.yaml
@@ -32,16 +32,22 @@ dataset:
     output_nc: 3
     serial_batches: False
     pool_size: 0
-    transform:
-      load_size: 286
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: False
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [286, 286]
+        keys: [image, image]
+      - name: PairedRandomCrop
+        output_size: [256, 256]
+        keys: [image, image]
+      - name: PairedRandomHorizontalFlip
+        prob: 0.5
+        keys: [image, image]
+      - name: Permute
+        keys: [image, image]
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
+        keys: [image, image]
   test:
     name: PairedDataset
     dataroot: data/cityscapes/
@@ -52,16 +58,16 @@ dataset:
     output_nc: 3
     serial_batches: True
     pool_size: 50
-    transform:
-      load_size: 256
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: True
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [256, 256]
+        keys: [image, image]
+      - name: Permute
+        keys: [image, image]
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
+        keys: [image, image]
 
 optimizer:
   name: Adam
diff --git a/configs/pix2pix_facades.yaml b/configs/pix2pix_facades.yaml
index 31b5f145dccdfd75bbdcd14c3fa896676d729037..f8c83ff84d3f32ea0a79ab536aab64f5c41a9b8e 100644
--- a/configs/pix2pix_facades.yaml
+++ b/configs/pix2pix_facades.yaml
@@ -32,16 +32,22 @@ dataset:
     output_nc: 3
     serial_batches: False
     pool_size: 0
-    transform:
-      load_size: 286
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: False
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [286, 286]
+        keys: [image, image]
+      - name: PairedRandomCrop
+        output_size: [256, 256]
+        keys: [image, image]
+      - name: PairedRandomHorizontalFlip
+        prob: 0.5
+        keys: [image, image]
+      - name: Permute
+        keys: [image, image]
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
+        keys: [image, image]
   test:
     name: PairedDataset
     dataroot: data/facades/
@@ -52,16 +58,16 @@ dataset:
     output_nc: 3
     serial_batches: True
     pool_size: 50
-    transform:
-      load_size: 256
-      crop_size: 256
-      preprocess: resize_and_crop
-      no_flip: True
-      normalize:
-        mean:
-          (127.5, 127.5, 127.5)
-        std:
-          (127.5, 127.5, 127.5)
+    transforms:
+      - name: Resize
+        size: [256, 256]
+        keys: [image, image]
+      - name: Permute
+        keys: [image, image]
+      - name: Normalize
+        mean: [127.5, 127.5, 127.5]
+        std: [127.5, 127.5, 127.5]
+        keys: [image, image]
 
 optimizer:
   name: Adam
diff --git a/ppgan/datasets/paired_dataset.py b/ppgan/datasets/paired_dataset.py
index 368f8371178ab771d3139103992a97abc3ee0fe8..d15d43b131b96f4892dd6be9ec22b7faebd4607c 100644
--- a/ppgan/datasets/paired_dataset.py
+++ b/ppgan/datasets/paired_dataset.py
@@ -5,13 +5,13 @@ from .base_dataset import BaseDataset, get_params, get_transform
 from .image_folder import make_dataset
 
 from .builder import DATASETS
+from .transforms.builder import build_transforms
 
 
 @DATASETS.register()
 class PairedDataset(BaseDataset):
     """A dataset class for paired image dataset.
     """
-
     def __init__(self, cfg):
         """Initialize this dataset class.
 
@@ -19,11 +19,14 @@ class PairedDataset(BaseDataset):
             cfg (dict) -- stores all the experiment flags
         """
         BaseDataset.__init__(self, cfg)
-        self.dir_AB = os.path.join(cfg.dataroot, cfg.phase)  # get the image directory
-        self.AB_paths = sorted(make_dataset(self.dir_AB, cfg.max_dataset_size))  # get image paths
-        assert(self.cfg.transform.load_size >= self.cfg.transform.crop_size)   # crop_size should be smaller than the size of loaded image
+        self.dir_AB = os.path.join(cfg.dataroot,
+                                   cfg.phase)  # get the image directory
+        self.AB_paths = sorted(make_dataset(
+            self.dir_AB, cfg.max_dataset_size))  # get image paths
+        # assert(self.cfg.transform.load_size >= self.cfg.transform.crop_size)   # crop_size should be smaller than the size of loaded image
         self.input_nc = self.cfg.output_nc if self.cfg.direction == 'BtoA' else self.cfg.input_nc
         self.output_nc = self.cfg.input_nc if self.cfg.direction == 'BtoA' else self.cfg.output_nc
+        self.transforms = build_transforms(cfg.transforms)
 
     def __getitem__(self, index):
         """Return a data point and its metadata information.
@@ -49,27 +52,20 @@ class PairedDataset(BaseDataset):
         A = AB[:h, :w2, :]
         B = AB[:h, w2:, :]
 
-
         # apply the same transform to both A and B
         # transform_params = get_params(self.opt, A.size)
-        transform_params = get_params(self.cfg.transform, (w2, h))
+        # transform_params = get_params(self.cfg.transform, (w2, h))
 
-        A_transform = get_transform(self.cfg.transform, transform_params, grayscale=(self.input_nc == 1))
-        B_transform = get_transform(self.cfg.transform, transform_params, grayscale=(self.output_nc == 1))
+        # A_transform = get_transform(self.cfg.transform, transform_params, grayscale=(self.input_nc == 1))
+        # B_transform = get_transform(self.cfg.transform, transform_params, grayscale=(self.output_nc == 1))
 
-        A = A_transform(A)
-        B = B_transform(B)
+        # A = A_transform(A)
+        # B = B_transform(B)
+        # A, B = self.transforms((A, B))
+        A, B = self.transforms((A, B))
 
         return {'A': A, 'B': B, 'A_paths': AB_path, 'B_paths': AB_path}
 
     def __len__(self):
         """Return the total number of images in the dataset."""
         return len(self.AB_paths)
-
-    def get_path_by_indexs(self, indexs):
-        if isinstance(indexs, paddle.Variable):
-            indexs = indexs.numpy()
-        current_paths = []
-        for index in indexs:
-            current_paths.append(self.AB_paths[index])
-        return current_paths
diff --git a/ppgan/datasets/transforms/__init__.py b/ppgan/datasets/transforms/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..7734481de315882ca29235ddb4b63aa8d4e7a58c
--- /dev/null
+++ b/ppgan/datasets/transforms/__init__.py
@@ -0,0 +1 @@
+from .transforms import RandomCrop, Resize, RandomHorizontalFlip, PairedRandomCrop, PairedRandomHorizontalFlip, Normalize, Permute
diff --git a/ppgan/datasets/transforms/builder.py b/ppgan/datasets/transforms/builder.py
new file mode 100644
index 0000000000000000000000000000000000000000..01e8f9c5b1da88807f10b4aeff76a17c5653e408
--- /dev/null
+++ b/ppgan/datasets/transforms/builder.py
@@ -0,0 +1,55 @@
+import copy
+import traceback
+import paddle
+from ...utils.registry import Registry
+
+TRANSFORMS = Registry("TRANSFORMS")
+
+
+class Compose(object):
+    """
+    Composes several transforms together use for composing list of transforms
+    together for a dataset transform.
+
+    Args:
+        transforms (list): List of transforms to compose.
+
+    Returns:
+        A compose object which is callable, __call__ for this Compose
+        object will call each given :attr:`transforms` sequencely.
+
+    """
+    def __init__(self, transforms):
+        self.transforms = transforms
+
+    def __call__(self, data):
+        for f in self.transforms:
+            try:
+                # multi-fileds in a sample
+                # if isinstance(data, Sequence):
+                #     data = f(*data)
+                # # single field in a sample, call transform directly
+                # else:
+                data = f(data)
+            except Exception as e:
+                stack_info = traceback.format_exc()
+                print("fail to perform transform [{}] with error: "
+                      "{} and stack:\n{}".format(f, e, str(stack_info)))
+                raise e
+        return data
+
+
+def build_transform(cfg):
+    pass
+
+
+def build_transforms(cfg):
+    transforms = []
+
+    for trans_cfg in cfg:
+        temp_trans_cfg = copy.deepcopy(trans_cfg)
+        name = temp_trans_cfg.pop('name')
+        transforms.append(TRANSFORMS.get(name)(**temp_trans_cfg))
+
+    transforms = Compose(transforms)
+    return transforms
diff --git a/ppgan/datasets/transforms/transforms.py b/ppgan/datasets/transforms/transforms.py
index fa54da01bb23b50f71ea47b795cb67d595ce76ef..97287aab59d12fb1cc42016e7427b3d21435e39f 100644
--- a/ppgan/datasets/transforms/transforms.py
+++ b/ppgan/datasets/transforms/transforms.py
@@ -1,9 +1,101 @@
+import sys
+import types
 import random
+import numbers
+import warnings
+import traceback
+import collections
+import numpy as np
 
+from paddle.utils import try_import
+import paddle.vision.transforms.functional as F
+import paddle.vision.transforms.transforms as T
 
-class RandomCrop(object):
+from .builder import TRANSFORMS
 
-    def __init__(self, output_size):
+if sys.version_info < (3, 3):
+    Sequence = collections.Sequence
+    Iterable = collections.Iterable
+else:
+    Sequence = collections.abc.Sequence
+    Iterable = collections.abc.Iterable
+
+
+class Transform():
+    def _set_attributes(self, args):
+        """
+        Set attributes from the input list of parameters.
+
+        Args:
+            args (list): list of parameters.
+        """
+        if args:
+            for k, v in args.items():
+                # print(k, v)
+                if k != "self" and not k.startswith("_"):
+                    setattr(self, k, v)
+
+    def apply_image(self, input):
+        raise NotImplementedError
+
+    def __call__(self, inputs):
+        # print('debug:', type(inputs), type(inputs[0]))
+        if isinstance(inputs, tuple):
+            inputs = list(inputs)
+        if self.keys is not None:
+            for i, key in enumerate(self.keys):
+                if isinstance(inputs, dict):
+                    inputs[key] = getattr(self, 'apply_' + key)(inputs[key])
+                elif isinstance(inputs, (list, tuple)):
+                    inputs[i] = getattr(self, 'apply_' + key)(inputs[i])
+        else:
+            inputs = self.apply_image(inputs)
+
+        if isinstance(inputs, list):
+            inputs = tuple(inputs)
+
+        return inputs
+
+
+@TRANSFORMS.register()
+class Resize(Transform):
+    """Resize the input Image to the given size.
+
+    Args:
+        size (int|list|tuple): Desired output size. If size is a sequence like
+            (h, w), output size will be matched to this. If size is an int,
+            smaller edge of the image will be matched to this number.
+            i.e, if height > width, then image will be rescaled to
+            (size * height / width, size)
+        interpolation (int, optional): Interpolation mode of resize. Default: 1.
+            0 : cv2.INTER_NEAREST
+            1 : cv2.INTER_LINEAR
+            2 : cv2.INTER_CUBIC
+            3 : cv2.INTER_AREA
+            4 : cv2.INTER_LANCZOS4
+            5 : cv2.INTER_LINEAR_EXACT
+            7 : cv2.INTER_MAX
+            8 : cv2.WARP_FILL_OUTLIERS
+            16: cv2.WARP_INVERSE_MAP
+
+    """
+    def __init__(self, size, interpolation=1, keys=None):
+        super().__init__()
+        assert isinstance(size, int) or (isinstance(size, Iterable)
+                                         and len(size) == 2)
+        self._set_attributes(locals())
+        if isinstance(self.size, Iterable):
+            self.size = tuple(size)
+
+    def apply_image(self, img):
+        return F.resize(img, self.size, self.interpolation)
+
+
+@TRANSFORMS.register()
+class RandomCrop(Transform):
+    def __init__(self, output_size, keys=None):
+        super().__init__()
+        self._set_attributes(locals())
         if isinstance(output_size, int):
             self.output_size = (output_size, output_size)
         else:
@@ -19,12 +111,171 @@ class RandomCrop(object):
         j = random.randint(0, w - tw)
         return i, j, th, tw
 
-    def __call__(self, img):
+    def apply_image(self, img):
         i, j, h, w = self._get_params(img)
         cropped_img = img[i:i + h, j:j + w]
         return cropped_img
 
 
+@TRANSFORMS.register()
+class PairedRandomCrop(RandomCrop):
+    def __init__(self, output_size, keys=None):
+        super().__init__(output_size, keys)
+
+        if isinstance(output_size, int):
+            self.output_size = (output_size, output_size)
+        else:
+            self.output_size = output_size
+
+    def apply_image(self, img, crop_prams=None):
+        if crop_prams is not None:
+            i, j, h, w = crop_prams
+        else:
+            i, j, h, w = self._get_params(img)
+        cropped_img = img[i:i + h, j:j + w]
+        return cropped_img
+
+    def __call__(self, inputs):
+        if isinstance(inputs, tuple):
+            inputs = list(inputs)
+        if self.keys is not None:
+            if isinstance(inputs, dict):
+                crop_params = self._get_params(inputs[self.keys[0]])
+            elif isinstance(inputs, (list, tuple)):
+                crop_params = self._get_params(inputs[0])
+
+            for i, key in enumerate(self.keys):
+                if isinstance(inputs, dict):
+                    inputs[key] = getattr(self, 'apply_' + key)(inputs[key],
+                                                                crop_params)
+                elif isinstance(inputs, (list, tuple)):
+                    inputs[i] = getattr(self, 'apply_' + key)(inputs[i],
+                                                              crop_params)
+        else:
+            crop_params = self._get_params(inputs)
+            inputs = self.apply_image(inputs, crop_params)
+
+        if isinstance(inputs, list):
+            inputs = tuple(inputs)
+        return inputs
+
+
+@TRANSFORMS.register()
+class RandomHorizontalFlip(Transform):
+    """Horizontally flip the input data randomly with a given probability.
+
+    Args:
+        prob (float): Probability of the input data being flipped. Default: 0.5
+    """
+    def __init__(self, prob=0.5, keys=None):
+        super().__init__()
+        self._set_attributes(locals())
+
+    def apply_image(self, img):
+        if np.random.random() < self.prob:
+            return F.flip(img, code=1)
+        return img
+
+
+# import paddle
+# paddle.vision.transforms.RandomHorizontalFlip
+
+
+@TRANSFORMS.register()
+class PairedRandomHorizontalFlip(RandomHorizontalFlip):
+    def __init__(self, prob=0.5, keys=None):
+        super().__init__()
+        self._set_attributes(locals())
+
+    def apply_image(self, img, flip):
+        if flip:
+            return F.flip(img, code=1)
+        return img
+
+    def __call__(self, inputs):
+        if isinstance(inputs, tuple):
+            inputs = list(inputs)
+        flip = np.random.random() < self.prob
+        if self.keys is not None:
+
+            for i, key in enumerate(self.keys):
+                if isinstance(inputs, dict):
+                    inputs[key] = getattr(self, 'apply_' + key)(inputs[key],
+                                                                flip)
+                elif isinstance(inputs, (list, tuple)):
+                    inputs[i] = getattr(self, 'apply_' + key)(inputs[i], flip)
+        else:
+            inputs = self.apply_image(inputs, flip)
+
+        if isinstance(inputs, list):
+            inputs = tuple(inputs)
+
+        return inputs
+
+
+@TRANSFORMS.register()
+class Normalize(Transform):
+    """Normalize the input data with mean and standard deviation.
+    Given mean: ``(M1,...,Mn)`` and std: ``(S1,..,Sn)`` for ``n`` channels,
+    this transform will normalize each channel of the input data.
+    ``output[channel] = (input[channel] - mean[channel]) / std[channel]``
+
+    Args:
+        mean (int|float|list): Sequence of means for each channel.
+        std (int|float|list): Sequence of standard deviations for each channel.
+
+    """
+    def __init__(self, mean=0.0, std=1.0, keys=None):
+        super().__init__()
+        self._set_attributes(locals())
+
+        if isinstance(mean, numbers.Number):
+            mean = [mean, mean, mean]
+
+        if isinstance(std, numbers.Number):
+            std = [std, std, std]
+
+        self.mean = np.array(mean, dtype=np.float32).reshape(len(mean), 1, 1)
+        self.std = np.array(std, dtype=np.float32).reshape(len(std), 1, 1)
+
+    def apply_image(self, img):
+        return (img - self.mean) / self.std
+
+
+@TRANSFORMS.register()
+class Permute(Transform):
+    """Change input data to a target mode.
+    For example, most transforms use HWC mode image,
+    while the Neural Network might use CHW mode input tensor.
+    Input image should be HWC mode and an instance of numpy.ndarray.
+
+    Args:
+        mode (str): Output mode of input. Default: "CHW".
+        to_rgb (bool): Convert 'bgr' image to 'rgb'. Default: True.
+
+    """
+    def __init__(self, mode="CHW", to_rgb=True, keys=None):
+        super().__init__()
+        self._set_attributes(locals())
+        assert mode in [
+            "CHW"
+        ], "Only support 'CHW' mode, but received mode: {}".format(mode)
+        self.mode = mode
+        self.to_rgb = to_rgb
+
+    def apply_image(self, img):
+        if self.to_rgb:
+            img = img[..., ::-1]
+        if self.mode == "CHW":
+            return img.transpose((2, 0, 1))
+        return img
+
+
+# import paddle
+# paddle.vision.transforms.Normalize
+# TRANSFORMS.register(T.Normalize)
+
+
 class Crop():
     def __init__(self, pos, size):
         self.pos = pos
@@ -35,6 +286,6 @@ class Crop():
         x, y = self.pos
         th = tw = self.size
         if (ow > tw or oh > th):
-            return img[y: y + th, x: x + tw]
+            return img[y:y + th, x:x + tw]
 
-        return img
\ No newline at end of file
+        return img
diff --git a/ppgan/datasets/unpaired_dataset.py b/ppgan/datasets/unpaired_dataset.py
index 5cabc5391b84e9f6aa55e0925d4202c7b3d09418..45a7c4f47fccdbb2437775963fbf25f3a1a81134 100644
--- a/ppgan/datasets/unpaired_dataset.py
+++ b/ppgan/datasets/unpaired_dataset.py
@@ -5,13 +5,13 @@ from .base_dataset import BaseDataset, get_transform
 from .image_folder import make_dataset
 
 from .builder import DATASETS
+from .transforms.builder import build_transforms
 
 
 @DATASETS.register()
 class UnpairedDataset(BaseDataset):
     """
     """
-
     def __init__(self, cfg):
         """Initialize this dataset class.
 
@@ -19,18 +19,26 @@ class UnpairedDataset(BaseDataset):
             cfg (dict) -- stores all the experiment flags
         """
         BaseDataset.__init__(self, cfg)
-        self.dir_A = os.path.join(cfg.dataroot, cfg.phase + 'A')  # create a path '/path/to/data/trainA'
-        self.dir_B = os.path.join(cfg.dataroot, cfg.phase + 'B')  # create a path '/path/to/data/trainB'
+        self.dir_A = os.path.join(cfg.dataroot, cfg.phase +
+                                  'A')  # create a path '/path/to/data/trainA'
+        self.dir_B = os.path.join(cfg.dataroot, cfg.phase +
+                                  'B')  # create a path '/path/to/data/trainB'
 
-        self.A_paths = sorted(make_dataset(self.dir_A, cfg.max_dataset_size))   # load images from '/path/to/data/trainA'
-        self.B_paths = sorted(make_dataset(self.dir_B, cfg.max_dataset_size))    # load images from '/path/to/data/trainB'
+        self.A_paths = sorted(make_dataset(
+            self.dir_A,
+            cfg.max_dataset_size))  # load images from '/path/to/data/trainA'
+        self.B_paths = sorted(make_dataset(
+            self.dir_B,
+            cfg.max_dataset_size))  # load images from '/path/to/data/trainB'
         self.A_size = len(self.A_paths)  # get the size of dataset A
         self.B_size = len(self.B_paths)  # get the size of dataset B
         btoA = self.cfg.direction == 'BtoA'
-        input_nc = self.cfg.output_nc if btoA else self.cfg.input_nc       # get the number of channels of input image
-        output_nc = self.cfg.input_nc if btoA else self.cfg.output_nc      # get the number of channels of output image
-        self.transform_A = get_transform(self.cfg.transform, grayscale=(input_nc == 1))
-        self.transform_B = get_transform(self.cfg.transform, grayscale=(output_nc == 1))
+        input_nc = self.cfg.output_nc if btoA else self.cfg.input_nc  # get the number of channels of input image
+        output_nc = self.cfg.input_nc if btoA else self.cfg.output_nc  # get the number of channels of output image
+        # self.transform_A = get_transform(self.cfg.transform, grayscale=(input_nc == 1))
+        # self.transform_B = get_transform(self.cfg.transform, grayscale=(output_nc == 1))
+        self.transform_A = build_transforms(self.cfg.transforms)
+        self.transform_B = build_transforms(self.cfg.transforms)
 
         self.reset_paths()
 
@@ -49,10 +57,11 @@ class UnpairedDataset(BaseDataset):
             A_paths (str)    -- image paths
             B_paths (str)    -- image paths
         """
-        A_path = self.A_paths[index % self.A_size]  # make sure index is within then range
-        if self.cfg.serial_batches:   # make sure index is within then range
+        A_path = self.A_paths[
+            index % self.A_size]  # make sure index is within then range
+        if self.cfg.serial_batches:  # make sure index is within then range
             index_B = index % self.B_size
-        else:   # randomize the index for domain B to avoid fixed pairs.
+        else:  # randomize the index for domain B to avoid fixed pairs.
             index_B = random.randint(0, self.B_size - 1)
         B_path = self.B_paths[index_B]
 
diff --git a/ppgan/models/builder.py b/ppgan/models/builder.py
index bd2ed58f096679a00549d53b82e9e603e7208433..607f4e915f43eb85b0032981e70081ba03cb2a8c 100644
--- a/ppgan/models/builder.py
+++ b/ppgan/models/builder.py
@@ -2,18 +2,9 @@ import paddle
 
 from ..utils.registry import Registry
 
-
 MODELS = Registry("MODEL")
 
 
 def build_model(cfg):
-    # dataset = MODELS.get(cfg.MODEL.name)(cfg.MODEL)
-    # place = paddle.CUDAPlace(0)
-    # dataloader = paddle.io.DataLoader(dataset,
-    #                                 batch_size=1, #opt.batch_size,
-    #                                 places=place,
-    #                                 shuffle=True, #not opt.serial_batches,
-    #                                 num_workers=0)#int(opt.num_threads))
     model = MODELS.get(cfg.model.name)(cfg)
     return model
-    # pass
\ No newline at end of file
diff --git a/ppgan/models/pix2pix_model.py b/ppgan/models/pix2pix_model.py
index 3786b444ba7b73d98eb31d8b5bfca117e8567dd1..e9ff9a28d45fc8eb8916eaf254a8a35012440ab4 100644
--- a/ppgan/models/pix2pix_model.py
+++ b/ppgan/models/pix2pix_model.py
@@ -77,8 +77,8 @@ class Pix2PixModel(BaseModel):
         """
 
         AtoB = self.opt.dataset.train.direction == 'AtoB'
-        self.real_A = paddle.to_tensor(input['A' if AtoB else 'B'])
-        self.real_B = paddle.to_tensor(input['B' if AtoB else 'A'])
+        self.real_A = paddle.to_variable(input['A' if AtoB else 'B'])
+        self.real_B = paddle.to_variable(input['B' if AtoB else 'A'])
         self.image_paths = input['A_paths' if AtoB else 'B_paths']
 
     def forward(self):