Visual Cryptography Using Polarization-Modulation Films
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概要
- 論文の詳細を見る
Conventional visual cryptography reduces the resolution of secret information because its encryption is based on spatial coding that requires multiple subpixels to modulate light intensity. To overcome this resolution problem in visual cryptography, we propose a new type of visual cryptography based on polarization processing. Each pixel in a secret image is encrypted into a corresponding single pixel in encrypted films. The encrypted films are composed of a polarizing film and patterned retarder films. We developed an encryption code set for decoding by stacking the encrypted films in the correct order. Furthermore, we demonstrated multiple decoded results with encrypted films that exhibit stacking order dependence.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2009-09-25
著者
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Yamamoto Hirotsugu
Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, 2-1, Minamijosanjima-cho, Tokushima 770-8506, Japan
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Suyama Shiro
Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, Tokushima 770-8506, Japan
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Imagawa Takanori
Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, Tokushima 770-8506, Japan
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