General Framework of Reversible Watermarking Based on Asymmetric Histogram Shifting of Prediction Error

Table 1

Comparison of Tsai’s ED and SD.

Distortion types	Lena	Boat	Elaine	Baboon
1-EP
ED	10053	10721	6890	3697
SD	105672	105569	109079	111557
ED/SD	10.51	9.85	15.83	30.18
2-EP
ED	19382	20518	17686	6482
SD	192293	189870	205807	216280
ED/SD	9.92	9.25	11.64	33.37