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

Table 2

Comparison of embedding capacity of the proposed scheme and other schemes.

	Wu and Tsai’s scheme [18]	Nagaraj el al.’s scheme [27]	Prema and Manimegalai’s scheme [28]	Shiv and Arup’s scheme [30]	Proposed scheme (two directions)
	Capacity (bits)	Capacity (bits)	Capacity (bits)	Capacity (bits)	Capacity (bits)
Lena	1,248,890	524,457	2,305,342	2,516,141	3,739,287
Tiffany	1,225,240	523,641	2,306,394	2,330,381	3,678,830
Macaw	1,211,869	524,261	2,328,347	2,185,173	3,643,723
Beach	1,188,477	523,896	2,305,296	1,588,798	3,597,199
Pens	1,208,497	524,380	2,307,066	1,878,029	3,643,788
Girl	1,234,315	524,351	2,307,919	1,919,833	3,670,028
Cat	1,193,828	524,330	2,305,296	1,700,834	3,591,096
Flower	1,206,025	524,733	2,305,305	2,255,479	3,621,236
Average	1,214,643	524,256	2,308,871	2,046,834	3,648,148