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No 214099
標題(和) A Visually Better Recovered Image Selection for Imaging Inverse Problems
標題(英) A Visually Better Recovered Image Selection for Imaging Inverse Problems
研究会名(和) 回路とシステム, 通信方式, 信号処理
研究会名(英) Circuits and Systems, Communication Systems, Signal Processing
開催年月日 2012-03-08
終了年月日 2012-03-09
会議種別コード 5
共催団体名(和)
資料番号 CAS2011-108, SIP2011-128, CS2011-100
抄録(和)
抄録(英) In the last decade, many image recovery problems have been formulated as a certain nonsmooth convex minimization problem (we call it an original problem), and its minimizer, i.e., a recovery image, is not unique in some\r\ncases. In such cases, there exists visually different recovery images, and conventional image recovery techniques can not select a desired (visually better) recovery image. In this paper, we propose an optimization framework which allows us to select a better recovery image of the original problem in terms of the visual quality. First, a criteria\r\nfunction is introduced to choose a visually better recovery image from the set of minimizers of the original problem. Then, we formulate a hierarchical convex optimization problem which minimizes the criteria function over the set. The iterative algorithm based on the hybrid steepest descent method to solve the problem is also presented. To\r\napply the hybrid steepest descent method to the problem, we characterize the set of the minimizers of the original problem by the Douglas-Rachford splitting operator. Numerical results showed that, in case of the total variation based recovery, a visually better recovery image can be obtained by using our method.
収録資料名(和) 電子情報通信学会技術研究報告
収録資料の巻号 Vol.111, No.465,466,467
ページ開始 7
ページ終了 12
キーワード(和)
キーワード(英) Image recovery,Convex optimization,Inverse problem,Hybrid steepest descent method,Douglas-Rachford splitting
本文の言語 ENG
著者(和) 小野峻佑
著者(ヨミ) オノ シュンスケ
著者(英) Shunsuke Ono
所属機関(和) 東京工業大学
所属機関(英) Tokyo Institute of Technology
著者(和) 宮田高道
著者(ヨミ) ミヤタ タカミチ
著者(英) Takamichi Miyata
所属機関(和) 東京工業大学
所属機関(英) Tokyo Institute of Technology
著者(和) 山田功
著者(ヨミ) ヤマダ イサオ
著者(英) Isao Yamada
所属機関(和) 東京工業大学
所属機関(英) Tokyo Institute of Technology

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