diff --git a/pdseg/reader.py b/pdseg/reader.py
index 6fe395d5a003b2aeeffb7eaafc088c03c1802c1d..2e8f3908011eaf88c791adcf24a98e52d8d14392 100644
--- a/pdseg/reader.py
+++ b/pdseg/reader.py
@@ -318,6 +318,7 @@ class SegDataset(object):
             raise ValueError("Dataset mode={} Error!".format(mode))
 
         # Normalize image
+        img = img[...,::-1]
         img = self.normalize_image(img)
 
         if ModelPhase.is_train(mode) or ModelPhase.is_eval(mode):