http://tinyclouds.org/colorize/

http://www.hackerfactor.com/blog/index.php?/archives/432-Looks-Like-It.html

web : http://devlog-martinsh.blogspot.ca/2013/05/image-imperfections-and-film-grain-post.html

http://loopit.dk/banding_in_games.pdf

Sunset Lake Software: Optimizing Gaussian blurs on a mobile GPU http://sunsetlakesoftware.com/2013/10/21/optimizing-gaussian-blurs-mobile-gpu Game Rendering: Gaussian Blur Filter Shader http://www.gamerendering.com/2008/10/11/gaussian-blur…