¹ School of Automation, Guangdong University of Technology, Guangzhou, Guangdong, China.
²School of Computer Science, Guangdong University of Technology, Guangzhou, Guangdong, China.

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Abstract— There arefew watermarking algorithms for color images. In most traditional watermarking algorithms, transforms are applied to each component of the color model individually resulting in less robust experimental results. Therefore, we propose a color image watermarking algorithm which is a high-dimensional algorithm. First, Octonion Discrete Cosine Transform (ODCT) and its inverter transform (IODCT) are proven. Then, a novel color image watermarking technique based on ODCT is proposed. Experimental results show that it not only has good antito compression ability, but also has robustness to noise, filtering and rotation attacks.

Index Terms—Octonion, discrete cosine transform, color image watermarking.

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Cite: Shuang She, Guoheng Huang, Lianglun Cheng, "Color Image Watermarking Based on Octonion Discrete Cosine Transform," Journal of Software vol. 14, no. 1, pp. 13-23, 2019.