Update image_batch.py

fix int8 bugs

Author: Linaom1214

image_batch.py

@@ -151,7 +151,7 @@ def resize_pad(image, pad_color=(0, 0, 0)):
             sys.exit(1)
         if self.format == "NCHW":
             image = np.transpose(image, (2, 0, 1))
-        return image, scale
+        return image/255., scale
 
     def get_batch(self):
         """
@@ -169,4 +169,4 @@ def get_batch(self):
                 self.image_index += 1
                 batch_data[i], batch_scales[i] = self.preprocess_image(image)
             self.batch_index += 1
-            yield batch_data, batch_images, batch_scales
+            yield batch_data, batch_images, batch_scales