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Q: 

Programmatically Altering Images

I'd like to alter images programmatically. Specifically for the iPhone, but, general answers could help. For example, how could I, programmatically, add filters effects, such as those available in Photoshop.

Clearly it is possible as exemplified by apps such as Fat Booth. What is the starting point for this? Load an image as NSData and learn how PNGs are encoded and go to work with the algorithm? Possible? Easier solutions?

Thanks for the help!

A: 

Chapter 21 of iPhone SDK Development has an example of how to display and manipulate a photo that is pretty easy to follow. More complex effects require more complex code, but it's something to start with.

Robot K  2010-09-29 04:56:00

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