研究者情報 | 神奈川大学

コマツ　タカシ Komatsu Takashi 小松　隆所属神奈川大学工学部電気電子情報工学科職種助手
言語種別	日本語
発行・発表の年月	2008/03
形態種別	学術雑誌
査読	査読あり
標題	Total-Variation Approach and Wavelet Shrinkage for Color Image Denoising with Inter-Cannel Cross-correlations
執筆形態	共著
掲載誌名	Third International Symposium on communications, control and Signal Process
著者・共著者	T.Saito,T.Komatsu
概要	By replacing the total-variation (TV) norm in the TV variational denoising model by the Besov norm defined with the orthonormal wavelet coefficients of an image, the TV variational model is converted into the L1 variational model in the wavelet domain, and its solution is the classical wavelet shrinkage. The wavelet shrinkage denoising scheme works well for monochrome images; but its direct application to color images does not utilize cross-correlations among the three primary color channels, and hence in most cases it produces several noticeable artifacts as side effects. To utilize the inter-channel cross-correlations, this paper introduces the TV norms of color differences and color sums into the classical TV variational model. Moreover, this paper replaces all the TV norms by the Besov norms, and then derives new wavelet shrinkage for color-image denoising. Experimental simulations demonstrate that the utilization of inter-channel cross-correlations alleviates the side effects of denoising, and improves picture quality of denoised images, as well as we have expected.