question about photographic effects on iphone

I'm interested in implement of photographic effects on iphone. Taking Camera+ as an example, I'd like to know how to do the function of "Scenes", "Effects" and "Borders".

I'm fresh about it and just know it is in im开发者_开发技巧age processing domain. I'd like to know where to start if I want to do it myself on iPhone. Can you give any tip?

thanks!

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The easiest way to start image processing and applying effects to photos for iPhone apps is by using the Core Image technology that comes with Mac OS X and iOS 5.

With the Core Image, Apple provides you various filters that does all the pixel level processing needed. You can use these filters individually or combine them to create your effects.

The Photo Effects SDK may also ease your development further. It is built on the Core Image framework, comes with prebuilt effects and with an easy filter chaining support to create your custom effects.

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You should probably start by reading up on the Quartz 2D graphics engine and UIImage, the main image class in Cocoa Touch. If you're starting with no knowledge of image processing, you'll have a lot of learning to do before you think about writing an image processing application.