SURE-LET multichannel image denoising: undecimated wavelet thresholding

We propose an extension of the recently devised SURE-LET grayscale denoising approach for multichannel images. Assuming additive Gaussian white noise, the unknown linear parameters of a transform-domain pointwise multichannel thresholding are globally optimized by minimizing Stein’s unbiased MSE estimate (SURE) in the image-domain. Using the undecimated wavelet transform, we demonstrate the efficiency of this approach for denoising color images by comparing our results with two other state-of-the-art denoising algorithms.

• Type: Conference
• Year: 2008
• Where: ICASSP
• Authors: Florian Luisier, Thierry Blu
• Keywords: Denoising, Grayscale Denoising Approach, ICASSP 2008, Pointwise Multichannel Thresholding, Signal Processing