Upd: Research patches from azur-stats-server

(cherry picked from commit f3428c8a0f19570536e20ea54be41f481a5408db)

module/statistics/utils.py

@@ -6,7 +6,18 @@ import numpy as np
 from module.base.utils import crop, image_size
 
 
+class ImageUnknown(Exception):
+    """ Image from a unknown drop scene, no such method to parse """
+    pass
+
+
+class ImageDiscarded(Exception):
+    """ Image can be parsed but the statistical results are meaningless, discard this image """
+    pass
+
+
 class ImageError(Exception):
+    """ Error when parsing images """
     pass