hi

i'm currently trying to make a sketch that will make your face disapear and for this i need to be able to show a portion of a picture/movie instead of the entire picture/movie.

i use the opencv library to track the face http://ubaa.net/shared/processing/opencv/
and the face_detection example as beginning for the code

i'm currently working on it so i can't post my code now but the aim is to take a snapshot of the background and then show a portion of the background following the position of the rectangle made by the face detection


the only way i know to show picture is :

image(img, x, y, width, height)  

but with this i can only specify the size and position of the entire picture.


i think it could work if if could use somekind of alpha mask to hide the part i don't want to see in the picture

if anyone have an idea to help me ?

great !


thank you