| Paper Abstract and Keywords |
| Presentation |
2021-06-04 15:15
Acceleration of Dictionary Learning by Non-Separable Oversampled Lapped Transform for Image Restoration
Soushi Takahashi, Shogo Muramatsu (Niigata Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
This study proposes to accelerate example-based design of non-separable oversampled lapped transform (NSOLT) for image restoration. With development of the recent measurement techniques, it becomes possible to obtain a various huge amount of data. At the same time, image restoration by sparse modeling is demanded. There is a dictionary learning technique as an example of image restoration techniques. Muramatsu et al. proposed convolutional dictionary learning with NSOLT and showed the significance. Stochastic gradient decent (SGD) is used for optimization of design parameters on NSOLT as a structured convolutional dictionary. However, SGD has a disadvantage at convergence, so there is room for improvement. In this report, we propose to apply stochastic variance reduced gradient (SVRG) which is a variant of SGD and review the acceleration performance of the dictionary learning. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Dictionary learning / Sparse modeling / Non-separable oversampled lapped transform / Stochastic variance reduced gradient / Image restoration / / / |
| Reference Info. |
ITE Tech. Rep., vol. 45, no. 13, ME2021-58, pp. 87-92, June 2021. |
| Paper # |
ME2021-58 |
| Date of Issue |
2021-05-27 (IST, ME) |
| ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
| Download PDF |
|
| Conference Information |
| Committee |
IST ME IEICE-IE IEICE-SIP IEICE-BioX |
| Conference Date |
2021-06-03 - 2021-06-04 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Online |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
|
| Paper Information |
| Registration To |
ME |
| Conference Code |
2021-06-IST-ME-IE-SIP-BioX |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Acceleration of Dictionary Learning by Non-Separable Oversampled Lapped Transform for Image Restoration |
| Sub Title (in English) |
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| Keyword(1) |
Dictionary learning |
| Keyword(2) |
Sparse modeling |
| Keyword(3) |
Non-separable oversampled lapped transform |
| Keyword(4) |
Stochastic variance reduced gradient |
| Keyword(5) |
Image restoration |
| Keyword(6) |
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| Keyword(7) |
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| 1st Author's Name |
Soushi Takahashi |
| 1st Author's Affiliation |
Niigata University (Niigata Univ.) |
| 2nd Author's Name |
Shogo Muramatsu |
| 2nd Author's Affiliation |
Niigata University (Niigata Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2021-06-04 15:15:00 |
| Presentation Time |
30 minutes |
| Registration for |
ME |
| Paper # |
IST2021-27, ME2021-58 |
| Volume (vol) |
vol.45 |
| Number (no) |
no.13 |
| Page |
pp.87-92 |
| #Pages |
6 |
| Date of Issue |
2021-05-27 (IST, ME) |