Welcome to the spiritual successor of IPDFCameraViewController and MAImagePickerController, that tries to unite a usable & simple camera component class into a single UIView. Initially written as an essential component of InstaPDF 4.0 for instapdf.com, it seemed too useful to keep closed source.
Leave all the hard work dealing with AVFoundation, border detection and OpenGL up to VNImageScanner. It includes:
Live border detection & perspective correction Flash / Torch Image filters Simple API