| Presentation | 2023-03-01 Low-bit Image Restoration with Loop-unrolled ISTA Shu Abe, Soushi Takahashi, Shogo Muramatsu, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This study proposes a low-bit image restoration method based on a loop-unrolled network of Iterative Shrinkage Thresholding Algorithm (ISTA). ISTA, which performs optimization using the proximity gradient descent, has an advantages of high interpretability and the ability to approach an exact solution with a simple iteration of operations. However, it has a problem in terms of the amount of calculations due to the fact that a lot of operations are performed iteratively. In order to speed up and reduce the number of calculations, a loop-unrolled structure is adopted to enable restoration with a small number of iteration steps and to enable feed-forward and pipeline processing. In addition, we propose an implementation using fixed-point arithmetic to achieve higher speed in hardware implementation. Through simulation of image restoration and comparison with loop-processing ISTA, we confirm that loop-unrolled ISTA is capable of comparable restoration with fewer operations and higher throughput. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Loop-unrolling / iterative soft-thresholding algorithm / finite word length realization / hardware/software co-implementation |
| Paper # | EA2022-125,SIP2022-169,SP2022-89 |
| Date of Issue | 2023-02-21 (EA, SIP, SP) |
| Conference Information | |
| Committee | SP / IPSJ-SLP / EA / SIP |
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| Conference Date | 2023/2/28(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tomoki Toda(Nagoya Univ.) / Tomoki Toda(Nagoya Univ.) / Kenichi Furuya(Oita Univ.) / Toshihisa Tanaka(Tokyo Univ. Agri.&Tech.) |
| Vice Chair | / / Tatsuya Kako(NTT) / Junki Ono(Tokyo Metropolitan Univ.) / Koichi Ichige(Yokohama National Univ.) / Takayuki Nakachi(Ryukyu Univ.) |
| Secretary | (NTT) / (Univ. of Electro-Comm.) / Tatsuya Kako(NTT) / Junki Ono(Univ. of Electro-Comm.) / Koichi Ichige(NTT) / Takayuki Nakachi(RitsumeikanUniv.) |
| Assistant | Ryo Aihara(Mitsubishi Electric) / Daisuke Saito(Univ. of Tokyo) / Ryo Aihara(Mitsubishi Electric) / Daisuke Saito(Univ. of Tokyo) / Masato Nakayama(Osaka Sangyo Univ.) / Kouhei Yatabe(Tuat) / Taichi Yoshida(UEC) / Shoko Imaizumi(Chiba Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Speech / Special Interest Group on Spoken Language Processing / Technical Committee on Engineering Acoustics / Technical Committee on Signal Processing |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Low-bit Image Restoration with Loop-unrolled ISTA |
| Sub Title (in English) | |
| Keyword(1) | Loop-unrolling |
| Keyword(2) | iterative soft-thresholding algorithm |
| Keyword(3) | finite word length realization |
| Keyword(4) | hardware/software co-implementation |
| 1st Author's Name | Shu Abe |
| 1st Author's Affiliation | Niigata University(Niigata Univ) |
| 2nd Author's Name | Soushi Takahashi |
| 2nd Author's Affiliation | Niigata University(Niigata Univ) |
| 3rd Author's Name | Shogo Muramatsu |
| 3rd Author's Affiliation | Niigata University(Niigata Univ) |
| Date | 2023-03-01 |
| Paper # | EA2022-125,SIP2022-169,SP2022-89 |
| Volume (vol) | vol.122 |
| Number (no) | EA-387,SIP-388,SP-389 |
| Page | pp.pp.288-293(EA), pp.288-293(SIP), pp.288-293(SP), |
| #Pages | 6 |
| Date of Issue | 2023-02-21 (EA, SIP, SP) |