Watermarking Method for Monochrome Printing Images

Abstract

Recently, digital technology is advanced in many fields, and demands that the paper media such as the newspaper or the magazine are linked with the digital information will tend to increase in future. Various two-dimensional codes are proposed as techniques to link the digital information from the analog contents. However, two-dimensional code is meaningless information for human eyes, and it wastes space of paper. In this paper, we propose a method to solve this problem by applying digital watermarking to printing images. This method embeds a watermark in a monochrome image by using brightness value of pixel blocks.