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| Presentation | 2009-07-23 15:55 Auto Tone Mapping Method to Generate and Decode High Contrast Halftone Images in Visual Cryptography Emi Myodo, Koichi Takagi, Akio Yoneyama (KDDI R&D Labs.)  IE2009-53 MVE2009-28 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | An automatic tone mapping method is proposed in order to genarate and decode high contrast natural images. In halftone visual cryptography, three grayscale images are input and two binary halftone images, which correspond to two of them, are generated in the way that the rest of them is visually decoded by overlapping the two halftone images. In order to enhance image contrast, a conventional method has proposed the concept that noise added to each image is permitted to enlarge dynamic range. However, the conventional method has not proposed the automatic tone mapping method which can control the trade-off between noise and dynamic range. Therefore, we define the metric to asset the amount of noise and clarify the tone mapped condition that satisfies the highest dynamic renage and the predefined maximal amount of noise. By using that condition, we propose the automatic and unique tone mapping method. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | visual cryptography / halftone image / natural image / tone mapping / dynamic range / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 148, IE2009-53, pp. 25-30, July 2009. | |
| Paper # | IE2009-53 | |
| Date of Issue | 2009-07-16 (IE, MVE) | |
| ISSN | Print edition: ISSN 0913-5685 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 | IE2009-53 MVE2009-28 |
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| Conference Information | |
| Committee | MVE IE |
| Conference Date | 2009-07-23 - 2009-07-24 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Matsue Terrsa |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | IE |
| Conference Code | 2009-07-MVE-IE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Auto Tone Mapping Method to Generate and Decode High Contrast Halftone Images in Visual Cryptography |
| Sub Title (in English) | |
| Keyword(1) | visual cryptography |
| Keyword(2) | halftone image |
| Keyword(3) | natural image |
| Keyword(4) | tone mapping |
| Keyword(5) | dynamic range |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Emi Myodo |
| 1st Author's Affiliation | KDDI R&D Laboratories Inc. (KDDI R&D Labs.) |
| 2nd Author's Name | Koichi Takagi |
| 2nd Author's Affiliation | KDDI R&D Laboratories Inc. (KDDI R&D Labs.) |
| 3rd Author's Name | Akio Yoneyama |
| 3rd Author's Affiliation | KDDI R&D Laboratories Inc. (KDDI R&D Labs.) |
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| Speaker | Author-1 |
| Date Time | 2009-07-23 15:55:00 |
| Presentation Time | 25 minutes |
| Registration for | IE |
| Paper # | IE2009-53, MVE2009-28 |
| Volume (vol) | vol.109 |
| Number (no) | no.148(IE), no.149(MVE) |
| Page | pp.25-30 |
| #Pages | 6 |
| Date of Issue | 2009-07-16 (IE, MVE) |
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