Efficient Hybrid Blind Watermarking in DWT-DCT-SVD with Dual Biometric Features for Images

Table 4

Structural similarity index metrics (SSIM).

#	Attacks	SSIMB	SSIMS
1	Crop	0.87634	0.90724
2	Salt & pepper	0.99536	0.76606
3	Gaussian	0.46688	0.55715
4	Speckle	0.78373	0.84695
5	Rotation	0.78654	0.49736
6	Scale 2X	0.98742	0.97214
7	Scale 0.5X	0.99146	0.98632
8	Median	0.97755	0.76953
9	Sharpening	0.72219	0.68434
10	Motion blur	0.14037	0.049129
11	Average filter	0.12215	-ve
12	JPEG	0.9519	0.94418
13	JPEG2000	0.80577	0.84715