15 Useful Image filtering, processing, OCR, utilities and helper libraries / frameworks for iOS iPhone and iPad development

This is a list of iOS image filtering, processing, OCR, utilities and helper libraries and frameworks that I have come across for iPhone and iPad development and thought that they may be useful in one places:

1. GPU Image

By Brad Larson, GPUImage is a fantastic fast processing library to apply gpu accelerated filters to both live camera feed, movies or stills. It works on iOS 4 and above. It includes a range of filters such as Sepia, Grayscale, Blur but you can write your own easily.

Source: https://github.com/BradLarson/GPUImage

2. Core Image

This is an apple framework available from iOS 5. It leverages the GPU and you don’t need to know details of OpenGL, OpenGL ES.

Documentation: Apple Core Image Docs

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