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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Feature extractor and descriptor OpenCV performance on iOS iPad and iPhones

I came across an article demonstrating the performance of the feature extraction and descriptor, which is useful when building opencv on iOS as it shows how the performance of your application will change across all of the devices. It compares ORB, BRISK, FREAK (using GoodFeaturesToTrack), FAST, BRIEF (using GoodFeaturesToTrack), SIFT and SURF. Feature And Descriptor Performance opencv Continue reading “Feature extractor and descriptor OpenCV performance on iOS iPad and iPhones” »

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