how to get pixels within fixed boundary and changing the color of the pixels

Question

I'm using openCV library to detect facial features like lips and eye.i'have drawn points over lip and eye. now i want to get pixels within the lips and need to change the color of this pixels through the color filter. i know the coordinates where the lips located, using these coordinates how i can get pixels inside lip, how i can change the color and make that changes to reflect on original image. please see the attached screen shot - http://www.flickr.com/photos/108570354@N02/10834522165/

Answer 1

If I understand correctly your problem, you need to use one of these functions:

• fillpoly
• fillconvexpoly