Digital Image Steganography Using Eight-Directional PVD against RS Analysis and PDH Analysis

Table 6

Comparison of the proposed technique with techniques in [26–28].

Technique	PSNR	Capacity	Amount of hidden data in stego image to compute PSNR
2×3 adaptive PVD [26]	50.93	1445645	One lakh and forty thousand (140,000) bits
3×2 adaptive PVD [26]	50.93	1435623
3 PVD +3 LSB +EMD, type 1 [27]	41.07	1686041	Seven lakhs (700,000) bits
3 PVD +3 LSB +EMD, type 2 [27]	38.95	1798834
7 PVD +3 LSB +EMD, type 1 [27]	40.28	1710888
7 PVD +3 LSB +EMD, type 2 [27]	37.26	1823282
Proposed eight-directional PVD, type 1	39.55	2361368	Seven lakhs (700,000) bits
Proposed eight-directional PVD, type 2	37.22	2603604
Five-directional PVD+MLSB, type 1 [28]	37.62	2399853	Eight lakhs and forty thousand (840,000) bits
Five-directional PVD+MLSB, type 2 [28]	36.23	2514038
Eight-directional PVD+MLSB, type 1 [28]	37.49	2394086
Eight-directional PVD+MLSB, type 2 [28]	35.60	2603604