| Presentation | 2022-01-24 Acceleration of Bilateral Filter by Approximating Gaussian Weight Calculation Fumiya Kojima, Yoshihiro Maeda, Norishige Fukushima, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Bilateral filter is a typical edge-preserving smoothing filter that uses a Gaussian distribution.The Gaussian distribution is the basic distribution used in image processing and is often used as weights in convolution and image processing.The Gaussian distribution can be computed by the exp function, but this computation is heavier than usual and needs to be accelerated.A typical speed-up method is to use a LUT to store the precomputed results. However, in the case of bilateral filters, the value changes depending on the pixel, so efficient table referencing is not possible.There is also the problem of the need for quantization when convolving floating point signals.In this study, we propose a method to speed up the calculation of bilateral filter weights by approximate calculation.The results of approximations using the defining equation of the exp function and polynomial approximations were compared, and it was confirmed that the approximate calculation works faster than the LUT reference. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Bilateral filter / Gaussian distribution / Acceleration |
| Paper # | IE2021-33 |
| Date of Issue | 2022-01-17 (IE) |
| Conference Information | |
| Committee | IE |
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| Conference Date | 2022/1/24(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | National Institute of Informatics |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Image Processing, Image Coding, etc. |
| Chair | Kazuya Kodama(NII) |
| Vice Chair | Hiroyuki Bandoh(NTT) / Toshihiko Yamazaki(Univ. of Tokyo) |
| Secretary | Hiroyuki Bandoh(KDDI Research) / Toshihiko Yamazaki(Nagoya Inst. of Tech.) |
| Assistant | Shunsuke Iwamura(NHK) / Shinobu Kudo(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Image Engineering |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acceleration of Bilateral Filter by Approximating Gaussian Weight Calculation |
| Sub Title (in English) | |
| Keyword(1) | Bilateral filter |
| Keyword(2) | Gaussian distribution |
| Keyword(3) | Acceleration |
| 1st Author's Name | Fumiya Kojima |
| 1st Author's Affiliation | Nagoya Institute of Technology(NITech) |
| 2nd Author's Name | Yoshihiro Maeda |
| 2nd Author's Affiliation | Tokyo University of Science(TUS) |
| 3rd Author's Name | Norishige Fukushima |
| 3rd Author's Affiliation | Nagoya Institute of Technology(NITech) |
| Date | 2022-01-24 |
| Paper # | IE2021-33 |
| Volume (vol) | vol.121 |
| Number (no) | IE-346 |
| Page | pp.pp.33-38(IE), |
| #Pages | 6 |
| Date of Issue | 2022-01-17 (IE) |