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| Copyright Protection Scheme of Color Images for Libraries, Museums and Archives Based on Zero-Watermarking |
| Zhu Guang |
School of Economics and Management, Nanjing University of Information Science & Technology, Nanjing 210044, China;
School of Information Management, Nanjing University, Nanjing 210093, China |
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Abstract [Objective] A Zero-Watermarking Algorithm which has superior performance on transparency and real-time is designed in order to protect the copyright of color image resources for libraries, museums and archives under Internet. [Context] The algorithm can improve the visual quality of color images, while meeting the real-time demand of copyright protection under Internet. [Methods] The surf points and vectors of original color image are extracted. Then, the zero-watermarking sequence is produced by comparing the cosine angles between the surf vectors and a secret reference vector. At last, the copyright mark is obtained by Arnold transform. [Results] The algorithm which has the robust ability to resist on image attacks, while the coefficient of BCR can keep above 0.7. The proposed scheme can also protect and identify the copyright of color images in real-time. [Conclusions] The study is helpful to the protection of color images copyright and can promote the sharing of digital information resources in libraries, museums and archives.
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Received: 12 August 2015
Published: 06 April 2016
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