fix infer.py bug (#280)

deploy/python/infer.py

@@ -107,7 +107,6 @@ class DeployConfig:
             self.use_pr = deploy_conf["USE_PR"]
 
 
-
 class ImageReader:
     def __init__(self, configs):
         self.config = configs
@@ -117,19 +116,18 @@ class ImageReader:
     def process_worker(self, imgs, idx, use_pr=False):
         image_path = imgs[idx]
         im = cv2.imread(image_path, -1)
-        channels = im.shape[2]
-        ori_h = im.shape[0]
-        ori_w = im.shape[1]
-        if channels == 1:
+        if len(im.shape) == 2:
             im = cv2.cvtColor(im, cv2.COLOR_GRAY2BGR)
-            channels = im.shape[2]
+        channels = im.shape[2]
         if channels != 3 and channels != 4:
             print("Only support rgb(gray) or rgba image.")
             return -1
+        ori_h = im.shape[0]
+        ori_w = im.shape[1]
 
         # resize to eval_crop_size
         eval_crop_size = self.config.eval_crop_size
-        if (ori_h != eval_crop_size[0] or ori_w != eval_crop_size[1]):
+        if (ori_h != eval_crop_size[1] or ori_w != eval_crop_size[0]):
             im = cv2.resize(
                 im, eval_crop_size, fx=0, fy=0, interpolation=cv2.INTER_LINEAR)