X-Git-Url: https://git.ao2.it/experiments/opencv_trail_effect.git/blobdiff_plain/98204747b6c4091c125539c3b386a0b6557ae848..c12d0447caf616be8d55a10e7c8fc510b3fe6d46:/README

diff --git a/README b/README
index c4725c4..b5fba01 100644
--- a/README
+++ b/README
@@ -15,13 +15,15 @@ using OpenCV.
 
 Segmentation can done using either thresholding or background subtraction.
 
-The "sole" assumptions for a decent effect are that:
+A few conditions are required to create a decent effect:
 
-  1. the camera does not move;
-  2. the background lighting in the scene is quite stable (when doing
-     background subtraction it is recommended to disable auto-gain in the
-     camera, and avoiding any artifact introduced by the power line
-     frequency).
+  1. the camera should not move;
+  2. the lighting in the scene should be quite stable (when doing background
+     subtraction it is recommended to disable auto-gain in the camera, and
+     avoid any artifact introduced by the power line frequency);
+  3. the subject should enter the scene only after the background learning
+     phase has finished, i.e. after opencv_trail_effect has showed the preview
+     window.
 
 
 Examples of use
@@ -51,6 +53,8 @@ frames in the trail, possibly with the most recent frame drawn on top:
 
   $ ./opencv_trail_effect -l 10 -s background -d average -B
 
+Here is a video showing the examples from above:
+https://www.youtube.com/watch?v=X3oRozxt2O4
 
 Side note
 -------------------