A Watermarking Algorithm for Color Halftone Image Based on MBVQ
Wang Quan, Pan Rong, Jianying Li, Zhang Jianmei -, Ruilin Chen, Tong Tong · International Journal of Digital Content Technology and its Applications · 2011
This paper presents a new digital watermarking algorithm for color halftone images. According to the Minimal Brightness Variation Quadruples (MBVQ), this paper gets the conclusion that each pixel of color halftone image belongs to one of the five MBVQs. Based on the edge and MBVQ, this algorithm implements the watermark embedding in the halftone process. Experimental results show that the algorithm has a good transparent watermark, furthermore, it is robust against various signal processing such as random alternation, text addition and geometric shear.