fix crop_image bug

app.py

@@ -62,6 +62,7 @@ def crop_image(image, detection_result):
     width = image.shape[1]
     height = image.shape[0]
     # print(width, height)
+    crop_image = image
     for i, result in enumerate(detection_result[:1]):  # TODO only return first detected table
         class_id = int(result[5])
         score = float(result[4])