A Novel Scrambling Digital Image Watermark Algorithm Based on Double Transform Domains

Table 2

Watermark algorithm test results against different attacks.

Attack mode	No attack	Uniform noise (1)	Uniform noise (2)	Normal noise (1)	Normal noise (2)	Cropping (1)	Cropping (2)	Cropping edges
	0.9998	0.9884	0.9573	0.9824	0.9499	0.8776	0.6947	0.8348
	1.0000	0.9837	0.8517	0.9528	0.7635	0.9822	0.8693	0.9251
Graffiti	Montage	Half brightness	Double brightness	Rotation	Compress (1)	Compress (2)	Sharp	Mosaic
0.8990	0.8753	0.8561	0.6431	0.9513	0.9923	0.9873	0.8867	0.8991
0.9700	0.8440	0.9988	0.9988	0.7906	0.9513	0.7733	0.9768	0.9620