Image Denoising using Gaussian Scale Mixtures in the Wavelet Domain
Javier Portilla, Vasily Strela, Martin J. Wainwright, Eero P. Simoncelli · 2002
We describe a method for removing noise from digital images, based on a statistical model of the coefficients of an overcomplete multi-scale oriented basis. Neighborhoods of coefficients at adjacent positions and scales are modeled as the product of two independent random variables: a Gaussian vector and a hidden positive scalar multiplier.