23 September 2014 Information embedding to a real object by projecting a checkered-pattern carrier-screen image
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Abstract
We propose an information embedding technique to a real object by projecting a checkered-pattern carrier-screen image as an illumination. The carrier-screen image is an information hiding technique, which can decode a secret image physically by superimposing a periodic pattern. As a kind of carrier-screen images, we have developed the checkered-pattern carrier-screen images, which can be physically decoded by superimposing a sheet of checkered pattern. The secret information is also visualized by image sampling with certain interval. As an example of decoding by image sampling, we proposed a decoding method with a compact digital camera. The encoded carrier-screen image has an almost uniform pattern, because modulating a checkered pattern generates it. It is also easy to display on a liquid-crystal display, because it is represented on a square pixel structure. Experimental optical embedding and decoding with a digital camera results show effectiveness of the proposed system. Since the embedded information can be decoded by using an ordinary digital camera, our system expected to use not only steganographic purpose also prevention techniques on taking photos.
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Rui Shogenji, "Information embedding to a real object by projecting a checkered-pattern carrier-screen image", Proc. SPIE 9217, Applications of Digital Image Processing XXXVII, 92171T (23 September 2014); doi: 10.1117/12.2061687; https://doi.org/10.1117/12.2061687
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