Data-Hiding Scheme Using Multidirectional Pixel-Value Differencing on Colour Images

Table 4

Comparison of experimental results of two-way embedding and three-way embedding.

Images	Proposed scheme
	Two directions			Three directions
	-1 (dB)	-2 (dB)	Capacity (bits)	-1 (dB)	-2 (dB)	Capacity (bits)
Lena	30.9791	32.2565	3,739,287	26.9258	29.5024	5,671,307
Tiffany	30.2070	30.4749	3,678,830	27.6425	30.8193	5,557,627
Macaw	30.5083	32.7829	3,643,723	28.0548	30.2345	5,507,035
Beach	35.1747	36.2268	3,597,199	32.1241	35.2979	5,420,140
Pens	29.8021	32.4704	3,643,788	28.2435	30.0250	5,563,465
Girl	30.2782	32.9632	3,670,028	28.7210	30.4778	5,601,851
Cat	34.0405	36.0262	3,591,096	33.2151	35.9475	5,429,264
Flower	30.3256	32.8820	3,621,236	29.1141	31.1358	5,494,673
Average	31.4144	33.2603	3,648,148	29.2551	31.6800	5,530,670