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| Paper Abstract and Keywords | ||
| Presentation | 2019-03-14 11:05 Improvement of the Quality of Visual Secret Sharing Schemes with Shares Containing Inconsistent Pixels Mariko Fujii, Tomoharu Shibuya (Sophia Univ.)  EMM2018-114 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | (k, n)-visual secret sharing scheme ((k, n)-VSSS) is a method to divide a secret image into n images called shares that enable us to restore the original image by only stacking at least k of them without any complicated computations. In this paper, we study the implementation of (2, 2)-VSSS to share two secret images at the same time only by two shares. More precisely, we consider (2, 2)-VSSSin which the first secret image is decoded by stacking shares in the usual way, while the second one is done by stacking one of two shares reversibly. Since one of the shares must have some subpixels that inconsistently correspond to pixels of the original images, the decoded pixels incorrectly realize the original pixels, which causes serious degradation of the quality of decoded images. To reduce such degradation, we propose several methods to construct shares that utilize 8-neighbor Laplacian filter and halftoning. Then we show that the proposed methods can effectively improve the quality of decoded images. Moreover, we demonstrate that the proposed methods can be naturally extended to VSSS for RGB images. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | secret sharing / visual cryptography / threshold visual secret sharing schemes / multiple secret images / reversible share / halftone image / Laplacian filter / | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 494, EMM2018-114, pp. 123-128, March 2019. | |
| Paper # | EMM2018-114 | |
| Date of Issue | 2019-03-06 (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 | EMM2018-114 |
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| Conference Information | |
| Committee | EMM |
| Conference Date | 2019-03-13 - 2019-03-14 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | TBD |
| 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 | 2019-03-EMM |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of the Quality of Visual Secret Sharing Schemes with Shares Containing Inconsistent Pixels |
| Sub Title (in English) | |
| Keyword(1) | secret sharing |
| Keyword(2) | visual cryptography |
| Keyword(3) | threshold visual secret sharing schemes |
| Keyword(4) | multiple secret images |
| Keyword(5) | reversible share |
| Keyword(6) | halftone image |
| Keyword(7) | Laplacian filter |
| Keyword(8) | |
| 1st Author's Name | Mariko Fujii |
| 1st Author's Affiliation | Sophia University (Sophia Univ.) |
| 2nd Author's Name | Tomoharu Shibuya |
| 2nd Author's Affiliation | Sophia University (Sophia Univ.) |
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| Speaker | Author-1 |
| Date Time | 2019-03-14 11:05:00 |
| Presentation Time | 25 minutes |
| Registration for | EMM |
| Paper # | EMM2018-114 |
| Volume (vol) | vol.118 |
| Number (no) | no.494 |
| Page | pp.123-128 |
| #Pages | 6 |
| Date of Issue | 2019-03-06 (EMM) |
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