Update cv2.imread() patch with flags argument (#7287)

utils/general.py

@@ -925,8 +925,8 @@ def increment_path(path, exist_ok=False, sep='', mkdir=False):
 imshow_ = cv2.imshow  # copy to avoid recursion errors
 
 
-def imread(path):
+def imread(path, flags=cv2.IMREAD_COLOR):
-    return cv2.imdecode(np.fromfile(path, np.uint8), cv2.IMREAD_COLOR)
+    return cv2.imdecode(np.fromfile(path, np.uint8), flags)
 
 
 def imwrite(path, im):