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	2010/08
形態種別	学術雑誌
査読	査読あり
標題	Color shrinkage for sparse coding of color images
執筆形態	共著
掲載誌名	EUSIPCO2010
巻・号・頁	L-IVP-3,123-127頁
著者・共著者	Takahiro Saito,Yasutaka Ueda,Takashi Komatsu
概要	As a basic tool for deriving sparse representation of a color image from its atomic-decomposition with a redundant dictionary, this paper presents a new kind of shrinkage, viz. color shrinkage, which utilizes inter-channel color cross-correlations directly in the three primary color space. Among various schemes of color shrinkage, this paper particularly addresses the hard color-shrinkage, a natural extension of the classic hard-shrinkage, and shows the advantages over the existing shrinkage approach where the classic hardshrinkage is applied after a non-redundant color transformation. Moreover, to mitigate defects of the existing shrinkage approach, this paper presents a new simple color-shrinkage scheme that applies the classic hard-shrinkage together with a redundant color transformation instead of a non-redundant color transformation. Furthermore, this paper applies our color-shrinkage schemes to color-image denoising in the tight-frame Haar wavelet transform domain, and experimentally demonstrates their superiority over the existing shrinkage approach.