Local Denoising Based on Curvature Smoothing can Visually Outperform Non-local Methods on Photographs with Actual Noise

TitleLocal Denoising Based on Curvature Smoothing can Visually Outperform Non-local Methods on Photographs with Actual Noise
Publication TypeConference Paper
Year of Publication2016
AuthorsGhimpeteanu G, Kane D, Batard T, Levine S, Bertalmío M
Conference NameIEEE International Conference on Image Processing
Abstract
We propose a fast, local denoising method where the Euclidean curvature of the noisy image is approximated in a regularizing manner and a clean image is reconstructed from this smoothed curvature. User preference tests show that when denoising real photographs with actual noise our method produces results with the same visual quality as the more sophisticated, non-local algorithms Non-local Means and BM3D, but at a fraction of their computational cost. These tests also highlight the limitations of objective image quality metrics like PSNR and SSIM, which correlate poorly with user preference.