Possible Duplicate:
ios: Adding real time filter effects to photos
I want to apply filter effect to image which is captured by camera. I am successful to apply filter to image before capturing image.
But I want to show that effect live on camera as
http://itunes.apple.com/us/app/instagram/id389801252?mt=8
and
http://itunes.apple.com/in/app/camwow-free-photo-booth-effects/id418368641?mt=8
applications did.
I know in camwow they are using OpenGl for that, but not sure about instagram. Is there any alternative way for applying that effect live on cameraview and also after taking picture to apply to that picture.
If any one knows how can I do that with openGl, I mean any tutorial from where I can start OpenGl so that I can get my requirement as soon as possible