diff --git a/src/models/srnet.py b/src/models/srnet.py
index df74b5e..7c4ecd9 100644
--- a/src/models/srnet.py
+++ b/src/models/srnet.py
@@ -441,7 +441,7 @@ class SRMsbLsbFlipNet(SRNetBase):
             output_max_value=255
         )
         self._extract_pattern_S = layers.PercievePattern(receptive_field_idxes=[[0,0],[0,1],[1,0],[1,1]], center=[0,0], window_size=2)
-        self.flip_functions = [
+        self._flip_functions = [
             lambda x: x,
             lambda x: torch.flip(x, dims=[-2]),
             lambda x: torch.flip(x, dims=[-1]),
@@ -451,19 +451,23 @@ class SRMsbLsbFlipNet(SRNetBase):
     def forward(self, x, config=None):
         b,c,h,w = x.shape
         x = x.reshape(b*c, 1, h, w)
-        output = torch.zeros([b*c, 1, h*self.scale, w*self.scale], dtype=x.dtype, device=x.device)
-        for flip_f in self.flip_functions:
-           fliped_x = flip_f(x)
-           fliped_lsb = fliped_x % 16
-           fliped_msb = fliped_x - fliped_lsb           
-           output_msb = self.forward_stage(fliped_msb, self.scale, self._extract_pattern_S, self.msb_fn)
-           output_lsb = self.forward_stage(fliped_lsb, self.scale, self._extract_pattern_S, self.lsb_fn)        
-           if not config is None and config.current_iter % config.display_step == 0:
-              config.writer.add_histogram('output_lsb', output_lsb.detach().cpu().numpy(), config.current_iter)
-              config.writer.add_histogram('output_msb', output_msb.detach().cpu().numpy(), config.current_iter)
-           output += flip_f(output_msb + output_lsb)
-        output /= 4
-        x = output
+        lsb = x % 16
+        msb = x - lsb
+        output_msb = torch.zeros([b*c, 1, h*self.scale, w*self.scale], dtype=x.dtype, device=x.device)
+        output_lsb = torch.zeros([b*c, 1, h*self.scale, w*self.scale], dtype=x.dtype, device=x.device)
+        for flip_f in self._flip_functions:
+           rotated_msb = flip_f(msb)
+           rotated_lsb = flip_f(lsb)
+           output_msb_r = self.forward_stage(rotated_msb, self.scale, self._extract_pattern_S, self.msb_fn)
+           output_lsb_r = self.forward_stage(rotated_lsb, self.scale, self._extract_pattern_S, self.lsb_fn)
+           output_msb += flip_f(output_msb_r)
+           output_lsb += flip_f(output_lsb_r)
+        output_msb /= 4
+        output_lsb /= 4
+        if not config is None and config.current_iter % config.display_step == 0:
+            config.writer.add_histogram('output_lsb', output_lsb.detach().cpu().numpy(), config.current_iter)
+            config.writer.add_histogram('output_msb', output_msb.detach().cpu().numpy(), config.current_iter)
+        x = output_msb + output_lsb
         x = x.reshape(b, c, h*self.scale, w*self.scale)
         return x
 
diff --git a/src/test.py b/src/test.py
index 7cdb134..d155649 100644
--- a/src/test.py
+++ b/src/test.py
@@ -13,7 +13,8 @@ from pathlib import Path
 from torch.utils.tensorboard import SummaryWriter
 from torch.utils.data import Dataset, DataLoader
 from common.data import SRTrainDataset, SRTestDataset
-from common.utils import PSNR, cal_ssim, logger_info, _rgb2ycbcr, modcrop
+from common.utils import logger_info
+from common.metrics import PSNR, cal_ssim
 from common.test import test_steps
 from models import LoadCheckpoint
 torch.backends.cudnn.benchmark = True