The PatchMatch algorithm (http://en.wikipedia.org/wiki/PatchMatch) allows missing regions of a image to be "inpainted".

This Processing 2.0 (http://processing.org) Library uses the Java code developed by Xavier Philippeau, as an implemention of the algorithm described by Barnes et al (2009) http://www.developpez.net/forums/d947804/autres-langages/algorithmes/contribuez/java-patchmatch-inpainting-texture/

How to Install a Contributed Library in Processing - http://forum.processing.org/topic/how-to-install-a-contributed-library

========== Connelly Barnes, Eli Shechtman, Adam Finkelstein, and Dan B Goldman. 2009. PatchMatch: a randomized correspondence algorithm for structural image editing. ACM Trans. Graph. 28, 3, Article 24 (July 2009).