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Title: A Color Image Copyright Protection Scheme Based on Visual Cryptography and Discrete Cosine Transform
Authors: Chang, Chin-Chen;Hsiao, Ju-Yuan;Yeh, Jyh-Chiang
Contributors: 資訊工程系
Keywords: Discrete cosine transform;Intellectual property right;Visual cryptography
Date: 2002
Issue Date: 2012-05-02T09:37:48Z
Publisher: Maney Publishing
Abstract: In this paper, a copyright protection scheme based on visual cryptography and discrete cosine transform for colour images is proposed. Note that the watermark emphasized here is a colour watermark. Instead of hiding a watermark in a colour image for identifying the ownership of the image, all that is required is to construct an ownership share according to a master share created from the colour image by applying discrete cosine transform plus a watermark used for copyright certification. By stacking the master share and the ownership share together, the watermark for ownership identification can be revealed through the utilization of visual cryptography plus a little additional computation. Additionally, the present scheme is also extremely suitable for multiple watermarking. The security of this scheme can be guaranteed via a pseudo random mechanism and the feature of visual cryptography. With substantial experimental results, the robustness of this scheme can be demonstrated against various image processing attacks.
Relation: The Imaging Science Journal, 50(3): 133-140
Appears in Collections:[Department and Graduate Institute of Computer Science and Information Engineering] Periodical Articles

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