Research Article
Combining Haar Wavelet and Karhunen Loeve Transforms for Medical Images Watermarking
Table 6
PSNR, WPSNR, and Normalized Cross-Correlation for watermarked and attacked by “cropping.”
| Window size | PSNR (dB) | WPSNR (dB) | NC |
| 32 × 32 | 35.0841 | 41.1315 | 1.0000 | 64 × 64 | 24.2723 | 30.2761 | 1.0000 | 96 × 96 | 19.9352 | 25.9459 | 1.0000 | 128 × 128 | 17.5275 | 23.5390 | 0.9896 | 160 × 160 | 16.1426 | 22.1554 | 0.9793 |
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