講演名 | 2009/1/5 QUALITY IMPROVEMENT OF COMPRESSED COLOR IMAGES USING A PROBABILISTIC APPROACH(International Workshop on Advanced Image Technology 2009) , |
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PDFダウンロードページ | PDFダウンロードページへ |
抄録(和) | |
抄録(英) | In compressed color images, colors are usually represented by luminance and chrominance(YCbCr) components. Considering characteristics of human vision system, chrominance(CbCr) components are generally represented more coarsely than luminance component. Aiming at possible recovery of chrominance components, we propose a modelbased chrominance estimation algorithm where color images are modeled by a Markov random field(MRF). A simple MRF model is here used whose local conditional probability density function(pdf) for a color vector of a pixel is a Gaussian pdf depending on color vectors of its neighboring pixels. Chrominance components of a pixel are estimated by maximizing the conditional pdf given its luminance component and its neighboring color vectors. Experimental results show that the proposed chrominance estimation algorithm is effective for quality improvement of compressed color images such as JPEG and JPEG2000. |
キーワード(和) | |
キーワード(英) | compressed color image / chrominance estimation / MRF / JPEG / JPEG2000 |
資料番号 | IE2008-153 |
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研究会情報 | |
研究会 | IE |
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開催期間 | 2009/1/5(から1日開催) |
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講演論文情報詳細 | |
申込み研究会 | Image Engineering (IE) |
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本文の言語 | ENG |
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サブタイトル(和) | |
タイトル(英) | QUALITY IMPROVEMENT OF COMPRESSED COLOR IMAGES USING A PROBABILISTIC APPROACH(International Workshop on Advanced Image Technology 2009) |
サブタイトル(和) | |
キーワード(1)(和/英) | / compressed color image |
第 1 著者 氏名(和/英) | / Nobuteru Takao |
第 1 著者 所属(和/英) | Kyushu Institute of Technology, Dept. of Systems Design and Informatics |
発表年月日 | 2009/1/5 |
資料番号 | IE2008-153 |
巻番号(vol) | vol.108 |
号番号(no) | 373 |
ページ範囲 | pp.- |
ページ数 | 5 |
発行日 |