An Enhanced Informed Watermarking Scheme Using the Posterior Hidden Markov Model

Table 1

Mean and standard deviation (Std.) of watermarked images by different algorithms (Algs.).

Values	Algs.
	PriHIW		PostHIW		TIW
	PSNR (dB)	𝐷^PriDWT	PSNR (dB)	𝐷^PostDWT	PSNR (dB)	𝐷^TIWDWT
Mean	33.46	21.58	33.04	21.59	34.38	21.58
Std.	1.39	8.47	1.40	8.48	1.17	8.48