Wavelet domain denoising of single-band and multiband images adapted to the probability of the presence of features of interest
Aleksandra Pižurica, Wilfried R. Philips, Paul Scheunders · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2005
We study an image denoising approach the core of which is a locally adaptive estimation of the probability that a given coefficient contains a significant noise-free component, which we call "signal of interest". We motivate this approach within the minimum mean squared error criterion and develop and analyze different locally adaptive versions of this method for color and for multispectral images in remote sensing. For color images, we study two different approaches: (i) using a joint spatial/spectral activity indicator in the RGB color space and (ii) componentwise spatially adaptive denoising in a luminance-chrominance space. We demonstrate and discuss the advantages of both of these approaches in different scenarios. We also compare the analyzed method to other recent wavelet domain denoisers for multiband data both on color and on multispectral images.