[5] Zhang Y P, Jiang J, Zha Y L et al. Research on embedding capacity and efficiency of information hiding based on digital images[J]. International Journal of Intelligence Science, 3, 77-85(2013).
[10] Chen Q F, Chen G X, Wen S S et al. Anti-counterfeit technology of halftone image watermarking by digital screening[J]. Indonesian Journal of Electrical Engineering and Computer Science, 11, 5084-5090(2013).
[12] Zhou X. Research on hybrid screening algorithm model and its application[D]. Zhengzhou: PLA Information Engineering University, 5-6(2015).