High Capacity Image Steganography Using Modified LSB Substitution and PVD against Pixel Difference Histogram Analysis

Table 7

Comparison of techniques in [16, 24, 25].

Technique	PSNR	Capacity	Amount of hidden data in stego-image to compute PSNR
2 × 3 adaptive PVD [16]	50.93	1445645	One lakh and forty thousand (1,40,000) bits
3 × 2 adaptive PVD [16]	50.93	1435623
3 PVD +3 LSB +EMD, type 1 [24]	41.07	1686041	Seven lakhs (7,00,000) bits
3 PVD +3 LSB +EMD, type 2 [24]	38.95	1798834
7 PVD +3 LSB +EMD, type 1 [24]	40.28	1710888
7 PVD +3 LSB +EMD, type 2 [24]	37.26	1823282
Eight directional PVD, type 1 [25]	39.55	2361368	Seven lakhs (7,00,000) bits
Eight directional PVD, type 2 [25]	37.22	2603604
Proposed five directional PVD+MLSB, type 1	37.62	2399853	Eight lakhs and forty thousand (8,40,000) bits
Proposed five directional PVD+MLSB, type 2	36.23	2514038
Proposed eight directional PVD+MLSB, type 1	37.49	2394086
Proposed eight directional PVD+MLSB, type 2	35.60	2603604