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| Presentation | 2021-03-04 14:00 [Poster Presentation] A study of face detection and its privacy protection in photos taken by wide-angle surveillance camera Koki Nakai, Minoru Kuribayashi, Nobuo Funabiki (Okayama Univ.), Sohei Fujii, Hiroyuki Ishihara (Systems nakashima)  EMM2020-69 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this paper, we propose a privacy protection system that detects human faces from images taken by a wide-angle camera, which is assumed to be a surveillance camera, and encrypts the detected face area. for face detection , we employ the AdaBoost learning method based on Haar-like features, and the face region is detected from the image captured by the wide-angle camera. Thus, by creating the training data based on face images captured by a wide-angle camera, it is possible to detect faces without losing the detection accuracy even in surveillance cameras. As an encryption for privacy protection, the block-scrambling encryption method is employed. In face detection, it is necessary to reduce the probability of missing a face as much as possible from the viewpoint of privacy protection, while a certain amount of false positives could be sacrificed. In the case of false positives the features of the background color space cannot be retained, and the visual impact is caused in the previous encryption methods. Therefore, in the proposed encryption method, the visual degradation is suppressed by improving the processing of color components. Through simulations, we evaluate the effectiveness of the proposed method in terms of detection accuracy for face detection and visibility and image quality for encryption. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | face detection / block-scrambling encryption / privacy protection / wide-angle camera / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 418, EMM2020-69, pp. 13-18, March 2021. | |
| Paper # | EMM2020-69 | |
| Date of Issue | 2021-02-25 (EMM) | |
| 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 | EMM2020-69 |
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| Conference Information | |
| Committee | EMM |
| Conference Date | 2021-03-04 - 2021-03-05 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Image and Sound Quality, Metrics for Perception and Recognition, Human Auditory and Visual System, etc. |
| Paper Information | |
| Registration To | EMM |
| Conference Code | 2021-03-EMM |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study of face detection and its privacy protection in photos taken by wide-angle surveillance camera |
| Sub Title (in English) | |
| Keyword(1) | face detection |
| Keyword(2) | block-scrambling encryption |
| Keyword(3) | privacy protection |
| Keyword(4) | wide-angle camera |
| Keyword(5) | |
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| Keyword(8) | |
| 1st Author's Name | Koki Nakai |
| 1st Author's Affiliation | Okayama University (Okayama Univ.) |
| 2nd Author's Name | Minoru Kuribayashi |
| 2nd Author's Affiliation | Okayama University (Okayama Univ.) |
| 3rd Author's Name | Nobuo Funabiki |
| 3rd Author's Affiliation | Okayama University (Okayama Univ.) |
| 4th Author's Name | Sohei Fujii |
| 4th Author's Affiliation | Systems nakashima (Systems nakashima) |
| 5th Author's Name | Hiroyuki Ishihara |
| 5th Author's Affiliation | Systems nakashima (Systems nakashima) |
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| Speaker | Author-1 |
| Date Time | 2021-03-04 14:00:00 |
| Presentation Time | 15 minutes |
| Registration for | EMM |
| Paper # | EMM2020-69 |
| Volume (vol) | vol.120 |
| Number (no) | no.418 |
| Page | pp.13-18 |
| #Pages | 6 |
| Date of Issue | 2021-02-25 (EMM) |
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