A Novel Printable Watermarking Method in Dithering Halftone Images

Table 3

Quality comparisons of various algorithms using Pei-Guo-PSNR [12].

Algorithm		Original		Hagit’s method [13]		Guo et al.’s method [12]		Proposed method
		Average Pei-Guo-PSNR
Screen size
Embedded bits	0	31.56	31.19	N/A	N/A	N/A	N/A	N/A	N/A
	32	N/A	N/A	26.83	27.55	29.21	26.29	28.65	29.14
	128	N/A	N/A	26.80	27.52	29.17	26.55	28.58	28.82
	512	N/A	N/A	26.87	27.38	28.91	26.31	28.49	28.92