Abstract
This paper realizes and extends data hiding methods in gray-scale halftone images. Firstly, this paper reviews previous methods of data hiding in gray-scale halftone images. Secondly, this paper realizes and extends these methods. Finally, this paper compares the performance of different methods. According to the experimental results, it can be summarized: the CDRs using dual conjugate property are better than single conjugate property; using Jarvis kernel the reveal pattern has better CDRs than using Floyd-Steinberg kernel; Jarvis kernel the reveal pattern has better CDRs than in dot diffusion halftone images; for gray-scale halftone images, and DHDCED is the best method of previous methods.
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