| Presentation | 2017-09-05 Color group constraint for image smoothing Riku Mikami, Taichi Yoshida, Masahiro Iwahashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | $L_0$ gradient minimization is a technique that belongs to edge-preserving image smoothing. The objective function of $L_0$ gradient minimization consists of the quadratic data-fidelity and the $L_0$ gradient, which calculates the number of the non-zero gradients of an image, and various methods which approximately minimize it have been proposed. $L_0$ gradient minimization is a powerful tool as edge-preserving image smoothing, but it has an inherent difficulty. Since the free parameter controlling the degree of flatness does not have a physical meaning, its setting is troublesome. To avoid the troublesome work, we propose a method of edge-preserving image smoothing based on the number of color group constraint in this report. We define the color group as a set of pixels which have same pixel values and neighbor each other. The proposed method is strongly related with $L_0$ gradient minimization. Because, since a value of $L_0$ gradient is zero inside a color group, the number of color groups is linearly in proportion to $L_0$ gradient. The proposed method formulates the number of color groups as the control parameter, and the parameter visually has a physical meaning. Through simulations, results of the proposed method is enough smoothed images with preserved edges, compared with state-of-the-art methods of $L_0$ gradient minimization. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Edge-preserving image smoothing / $L_0$ gradient minimization / optimization |
| Paper # | LOIS2017-25,IE2017-46,EMM2017-54 |
| Date of Issue | 2017-08-28 (LOIS, IE, EMM) |
| Conference Information | |
| Committee | EMM / IE / LOIS / IEE-CMN / ITE-ME |
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| Conference Date | 2017/9/4(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kyoto Univ. (Clock Tower Centennial Hall) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Multimedia Communication/System, Lifelog Applications, IP Broadcasting/Video Transmission, Media Security, etc. |
| Chair | Keiichi Iwamura(TUS) / Takayuki Hamamoto(Tokyo Univ. of Science) / Hiroyuki Nishi(Sojo Univ.) / Yoshimi Fukumura(Nagaoka Univ. of Tech.) / Miki Haseyama(Hokkaido Univ.) |
| Vice Chair | Hirohisa Hioki(Kyoto Univ.) / Minoru Kuribayashi(Okayama Univ.) / Kazuya Kodama(NII) / Hideaki Kimata(NTT) / Tomohiro Yamada(NTT) / / Norio Tagawa(Tokyo Metropolitan Univ.) |
| Secretary | Hirohisa Hioki(Shizuoka Univ.) / Minoru Kuribayashi(Tokyo Metropolitan Univ.) / Kazuya Kodama(Nagoya Univ.) / Hideaki Kimata(KDDI Research) / Tomohiro Yamada(Nagasaki Univ.) / (NTT) / Norio Tagawa(CRIEPI) |
| Assistant | Kan Hyonho(NIT, Tokyo) / Harumi Murata(Chukyo Univ.) / Yasutaka Matsuo(NHK) / Kazuya Hayase(NTT) / Motoi Okamoto(Research Organization of Information and Systems) / Keisuke Utsu(Tokai Univ.) / Takeshi YAGI(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Enriched MultiMedia / Technical Committee on Image Engineering / Technical Committee on Life Intelligence and Office Information Systems / Technical Meeting on Communications / Technical Group on Media Engineering |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Color group constraint for image smoothing |
| Sub Title (in English) | |
| Keyword(1) | Edge-preserving image smoothing |
| Keyword(2) | $L_0$ gradient minimization |
| Keyword(3) | optimization |
| 1st Author's Name | Riku Mikami |
| 1st Author's Affiliation | Nagaoka University of Technology(Nagaoka Univ. of Tech.) |
| 2nd Author's Name | Taichi Yoshida |
| 2nd Author's Affiliation | Nagaoka University of Technology(Nagaoka Univ. of Tech.) |
| 3rd Author's Name | Masahiro Iwahashi |
| 3rd Author's Affiliation | Nagaoka University of Technology(Nagaoka Univ. of Tech.) |
| Date | 2017-09-05 |
| Paper # | LOIS2017-25,IE2017-46,EMM2017-54 |
| Volume (vol) | vol.117 |
| Number (no) | LOIS-199,IE-200,EMM-201 |
| Page | pp.pp.87-90(LOIS), pp.87-90(IE), pp.87-90(EMM), |
| #Pages | 4 |
| Date of Issue | 2017-08-28 (LOIS, IE, EMM) |