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| Presentation | 2022-02-25 10:55 Acceleration of local histogram generation for change detections in satellite SAR images using CPU-integrated graphics processor Masato Gocho (Mitsubishi Electric), Kazunori Ueda (Waseda Univ.)  SANE2021-101 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper presents OpenCL-based parallel implementations with CPU-integrated graphics processors for change detection algorithms in multi-temporal SAR images. In this algorithm, a histogram-based statistical value is generated from each subimage, which is centered around each pixel on SAR images, to judge whether the pixel is changed or not. To reduce the computation time, the generated histogram can be reused and updated using non-overlapped pixels between subimages that have same ranges of the pixel values. In the proposed algorithm, SAR images are subdivided with many subgroups of 16 work-items, and the 16 items cooperatively compute the 16 statistical values one by one by updating the histograms until the range of pixel values is changed. We found that the CPU-integrated GPU on the Core i7 processor takes 56 seconds, which is 7.6 times faster than the 4-threaded CPU, for two ALOS-2 images with 37305x26811 pixels. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | SAR image / change detection / histogram / integrated graphics processor / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 378, SANE2021-101, pp. 21-25, Feb. 2022. | |
| Paper # | SANE2021-101 | |
| Date of Issue | 2022-02-17 (SANE) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | SANE2021-101 |
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| Conference Information | |
| Committee | SAT SANE |
| Conference Date | 2022-02-24 - 2022-02-25 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Satellite technology, etc. |
| Paper Information | |
| Registration To | SANE |
| Conference Code | 2022-02-SAT-SANE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acceleration of local histogram generation for change detections in satellite SAR images using CPU-integrated graphics processor |
| Sub Title (in English) | |
| Keyword(1) | SAR image |
| Keyword(2) | change detection |
| Keyword(3) | histogram |
| Keyword(4) | integrated graphics processor |
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| 1st Author's Name | Masato Gocho |
| 1st Author's Affiliation | Mitsubishi Electric Corporation (Mitsubishi Electric) |
| 2nd Author's Name | Kazunori Ueda |
| 2nd Author's Affiliation | Waseda University (Waseda Univ.) |
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| Speaker | Author-1 |
| Date Time | 2022-02-25 10:55:00 |
| Presentation Time | 25 minutes |
| Registration for | SANE |
| Paper # | SANE2021-101 |
| Volume (vol) | vol.121 |
| Number (no) | no.378 |
| Page | pp.21-25 |
| #Pages | 5 |
| Date of Issue | 2022-02-17 (SANE) |
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