How do I apply a sepia tone to a photo with Cocoa Touch on the iPhone?
A:
You'll have to work with the CGImage property of your UIImage. Then, take a look at the reference of the CGImageRef type to learn how you can manipulate single pixels.
Macmade
2010-03-10 18:09:52
You can't learn how to manipulate single pixels in the CGImage reference. You need a CGBitmapContext.
KennyTM
2010-03-10 18:15:25