How to add photo effect on iOS [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 years ago.

How do I add effect (e.g. lomo) to a photo on iOS?

To make it simple, I wan开发者_开发百科na try to make an iPhone app which is similar to those photography apps, and I want a tutorial to start with.

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As coreImage framework is not present in iphone (atleast upto iOS 4.0), you will have to do image filtering by hand..You have to iterate through each pixel in an image and work on it..This thread discussed about various image filtering effects in iphone and is very useful..These guys say they are successful in porting imageMagick to iOS but I never tried that..Also I asked a question about implementing polaroid filter in iOS, though it didnt get a good answer, the question itself might be helpful..