Edge detection + pixel replacement +chroma keying matlab coding

Need a program with matlab (C code if a lot faster) to play the final result movie with a smartphone (Bangladesh programmer preferred but not limited to..) 1. To find the coordinates of chroma key foreground edges with frame by frame basis using appropriate edge detection for the youtube example movies with index “gangnam style + green screen” (please merge all the movies for demonstration) (something like photoshop magic wand menu or photo key 3 plugin) 2. Replace the second movie (with the same resolution of the first movie) pixels of all the coordinates within the edges found above with pixels of third movie pixels of all the corresponding coordinates – you can use [login to view URL] for the second movie and [login to view URL] for the third movie 3. Interface to manipulate the pixels of the third movie to any value I want for all the coordinates of all the frames of the movie 4. Insert fuzziness at the the edges detected by the above edge detection like photoshop chroma keying (like fuzziness in the movie in [login to view URL]) for natural chroma keying