GPUImage - GPUImage is an open source iOS framework for GPU-based image and video processing.
remove.bg - Remove the background of any image 100% automatically
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IMG.LY - Power Your Apps with IMG.LY | The Leading Provider of Design, Photo, and Video Editing SDKs
Removal.ai - Create transparent background for any image using Removal.ai - The fastest, easy-to-use & free tool to automatically remove backgrounds online.