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	2010/12
形態種別	学術雑誌
査読	査読あり
標題	Image Denoising with Hard Color-Shrinkage and Grouplet Transform
執筆形態	共著
掲載誌名	PCS2010, P3-27
巻・号・頁	pp.430-433頁
著者・共著者	Takahiro Saito, Ken-ichi Ishikawa, Yasutaka Ueda, Takashi Komatsu
概要	To remove signal-dependent noise of a digital color camera, we propose a denoising method with our hard color-shrinkage in the tight-frame grouplet transform domain. The classic hard-shrinkage works well for monochrome-image denoising. To utilize inter-channel color cross-correlations, a noisy image undergoes the color transformation from the RGB to the luminance-and-chrominance color space, and the luminance and the chrominance components are separately denoised; but this approach cannot cope with actual signal-dependent noise. To utilize the noise’s signal-dependencies, we construct the hard color-shrinkage where the inter-channel color cross-correlations are directly utilized in the RGB color space. The hard color-shrinkage alleviates denoising artifacts, and improves picture quality of denoised images.