The web app is a free service provided by the Center for Perceptual Systems at the University of Texas at Austin that applies a computational method called recursive condition means (RCM) to perform certain image processing tasks.
http://petapixel.com/2013/04/28/ut-austin-provides-advanced-denoising-web-app-for-photogs-to-experiment-with/?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+PetaPixel+%28PetaPixel%29