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Digital watermarking
Stego-image (I) Secret/public key (K)
2 3
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Watermark (W) and/or original image (I) Watermark detection
Test-image (I~')
Watermark or confidence measure
Secret/public key (K)
2 4
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0.35
Spatial Domain Multi−Resolution 0.3
Bit−Error Rate
0.25
0.2
0.15
0.1
0.05
0 30
2 5
40
50
60 70 JPEG−Quality
80
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2 6
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4.6
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0.7
0.6
0.5
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0.4
0.3
0.2
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0
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2 8
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0.2
0.3
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