diff --git a/lib/utils/blob.py b/lib/utils/blob.py
index 63c1b52e..d865cd12 100644
--- a/lib/utils/blob.py
+++ b/lib/utils/blob.py
@@ -38,5 +38,6 @@ def prep_im_for_blob(im, pixel_means, target_size, max_size):
         im_scale = float(max_size) / float(im_size_max)
     im = cv2.resize(im, None, None, fx=im_scale, fy=im_scale,
                     interpolation=cv2.INTER_LINEAR)
+    # length*im_scale
 
     return im, im_scale