ミヤタ　タカミチ   Takamichi Miyata   宮田　高道    所属   千葉工業大学  先進工学部 知能メディア工学科    千葉工業大学  工学研究科 工学専攻    千葉工業大学  先進工学研究科 知能メディア工学専攻    職種   教授
言語種別	英語
発行・発表の年月	2012
形態種別	学術雑誌
査読	査読あり
標題	Colorization based Image Coding by using Local Correlation between Luminance and Chrominance
執筆形態	共著
掲載誌名	IEICE Transactions on Information and Systems
掲載区分	国内
巻・号・頁	Vol. E95-D(No.1),pp.pp.247-255
著者・共著者	Yoshitaka Inoue,Takamichi Miyata,Yoshinori Sakai,
概要	Recently, a novel approach to color image compression based on colorization has been presented. The conventional method for colorization-based image coding tends to lose the local oscillation of chrominance components that the original images had. A large number of color assignments is required to restore these oscillations. In this paper, we propose a new colorization-based image coding method that utilizes the local correlation between texture components of luminance and chrominance. The local correlation relationships are approximated by linear functions, and their coefficients are extracted by an optimization method. This key idea enables us to represent the oscillations of chrominance components by using only a few pieces of information.