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Table 4 Normalized correlation coefficients after JPEG2000 compression on watermarked images in which the watermark is embedded in the highest frequency subband.

From: A Contourlet-Based Image Watermarking Scheme with High Resistance to Removal and Geometrical Attacks

Host

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Baboon

0.907042

0.954985

0.973306

0.978915

0.983985

0.98639

0.98639

Barbara

0.971182

0.977175

0.980079

0.98293

0.983295

0.983295

0.983295

Boat

0.96877

0.976222

0.980652

0.985366

0.985643

0.985643

0.985643

Cameraman

0.983941

0.986697

0.987041

0.987041

0.987041

0.987041

0.987041

City

0.955788

0.973253

0.981524

0.984497

0.986288

0.986288

0.986288

Couple

0.971682

0.980032

0.983572

0.986312

0.986312

0.986312

0.986312

Elaine

0.964434

0.980293

0.984266

0.98591

0.986947

0.986947

0.986947

Lena

0.97721

0.982396

0.985192

0.986252

0.986252

0.986252

0.986252

Man

0.9623

0.971662

0.975141

0.980085

0.980611

0.980611

0.980611

Peppers

0.967675

0.977996

0.982511

0.985192

0.985192

0.985192

0.985192

Zelda

0.977523

0.980563

0.985064

0.985319

0.985319

0.985319

0.985319