README: fix a typo s/has showed/has shown/

[experiments/opencv_trail_effect.git] / README

diff --git a/README b/README
index 8fa70b9..1672722 100644 (file)
--- a/README
+++ b/README
@@ -13,7 +13,8 @@ Some examples of it are:
 opencv_trail_effect draws a trail after performing foreground segmentation
 using OpenCV.
 
-Segmentation can done using either thresholding or background subtraction.
+Segmentation in opencv_trail_effect can done using either thresholding or
+background subtraction.
 
 A few conditions are required to create a decent effect:
 
@@ -22,7 +23,7 @@ A few conditions are required to create a decent effect:
      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
+     phase has finished, i.e. after opencv_trail_effect has shown the preview
      window.
 
 
@@ -53,6 +54,8 @@ 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
 -------------------