| Presentation | 2009-07-23 Auto Tone Mapping Method to Generate and Decode High Contrast Halftone Images in Visual Cryptography Emi MYODO, Koichi TAKAGI, Akio YONEYAMA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | visual cryptography / halftone image / natural image / tone mapping / dynamic range |
| Paper # | IE2009-53,MVE2009-28 |
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| Conference Information | |
| Committee | MVE |
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| Conference Date | 2009/7/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Media Experience and Virtual Environment (MVE) |
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| Language | JPN |
| 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 |
| 1st Author's Name | Emi MYODO |
| 1st Author's Affiliation | KDDI R & D Laboratories Inc.() |
| 2nd Author's Name | Koichi TAKAGI |
| 2nd Author's Affiliation | KDDI R & D Laboratories Inc. |
| 3rd Author's Name | Akio YONEYAMA |
| 3rd Author's Affiliation | KDDI R & D Laboratories Inc. |
| Date | 2009-07-23 |
| Paper # | IE2009-53,MVE2009-28 |
| Volume (vol) | vol.109 |
| Number (no) | 149 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |