Abstract—This paper presents a double domain watermarking scheme for binary document image. The watermark patterns are generated as the discrete cosine transform (DCT) domain signals, and then perceptually shaped through weighting its components in the spatial domain with the perceptual masks. The perceptual masks are obtained by applying a psychovisual model in the spatial domain and simultaneously considering the impact of the distance between two flappable pixels. Watermark extraction can be operated by applying a correlation based detector in either of the two domains. The approach exploits the information of the two domains for embedding, but avoids transforming the original binary image directly, which does not cause unacceptable loss of watermark. The experimental results show that the presented approach performs very well both in invisibility and robustness.

Index Terms—Image watermarking, double domains, binary document image, robustness

Xinshan Zhu is with the State Key Laboratory of Digital Publishing Technology, Chengfu Road 298, Beijing, 100871 China and the Information Engineering College of Yangzhou University, Jiangsu, 225000 China(e-mail: xszhu_hm@hotmail.com).
Lei Wen is with the Information Engineering College of Yangzhou University, Jiangsu, 225000 China (e-mail: maxwen@163.com).Yanming Chen was with the Information Engineering College of Yangzhou University, Jiangsu, 225000 China. He is now with the Recruitment Information Department, Office of Yangzhou Human Resources Market Management, Jiangsu, 225000 China (e-mail:cnj-52633@yeah.net).

Cite: Xinshan Zhu, Member, IEEE, Lei Wen, and Yanming Chen, "Novel Binary Document Image Watermarking Exploiting the Features of Double Domains," International Journal of Computer and Electrical Engineering vol. 4, no. 1, pp. 87-92, 2012.