A Novel Printable Watermarking Method in Dithering Halftone Images

Table 8

Numbers of equivalent black pixel pairs in eight test images using the proposed method.

Number of subimages		1	4	16	64	128	256
Total number of pairs		8	32	128	512	1024	2048
Number of EBPs	Lena	0	0	0	0	0	0
	Mandrill	0	0	0	0	0	0
	Earth	0	0	0	0	0	0
	Tiffany	0	2	22	146	373	830
	Shuttle	0	0	0	0	0	0
	Peppers	0	0	0	0	0	0
	Milk	0	0	0	0	0	0
	Lake	0	0	0	0	0	0