App design with some image processing.

Apple Xcode Objective-C source code for video capture, with image processing for selected object in image. Once the area is detected / covered up, such as a cross or grid miniature barcode, then the camera will store a still image. Example code shall include a small learning section to tell the App what the area is to search for, like a button inside the image for the user to choose.

Ok to do dual App design for Android and iOS would be advantageous but not essential. iOS to start with. Prefer objection C. Thanks for looking. Genuine bids only.