Research Article
Color Image Denoising Based on Guided Filter and Adaptive Wavelet Threshold
Table 1
PSNR of the proposed method, bilateral filtering, and adaptive wavelet.
| Noise variance | 0.01 | 0.03 | 0.01 | 0.03 | 0.01 | 0.03 |
| | Image 1 () | Image 2 () | Image 3 () | Adaptive wavelet | 26.7048 | 25.4507 | 28.0801 | 26.4821 | 27.7967 | 26.1699 | Bilateral filtering | 22.5751 | 22.0167 | 23.1551 | 22.6118 | 22.7560 | 22.1802 | Nonlocal means | 29.9765 | 27.4871 | 30.1415 | 27.6777 | 30.1910 | 27.6823 | BM3D | 28.9235 | 26.9276 | 30.4215 | 27.8901 | 30.9457 | 28.0957 | Proposed method | 39.5634 | 35.3129 | 41.5647 | 36.0267 | 40.8101 | 35.5930 | | Image 4 () | Image 5 () | Image 6 () | Adaptive wavelet | 25.2375 | 24.2724 | 23.4663 | 22.7332 | 25.6576 | 24.5766 | Bilateral filtering | 22.6074 | 21.9415 | 22.1076 | 21.5494 | 22.3016 | 21.7254 | Nonlocal means | 26.6512 | 25.3287 | 25.3588 | 24.3120 | 27.8813 | 26.2105 | BM3D | 25.5157 | 24.4968 | 24.0394 | 23.2556 | 28.0621 | 26.3334 | Proposed method | 37.0265 | 34.1344 | 33.8535 | 32.1364 | 36.8294 | 33.9588 | | Image 7 () | Image 8 () | Image 9 () | Adaptive wavelet | 27.5706 | 25.9130 | 29.0039 | 26.9908 | 21.4746 | 20.8466 | Bilateral filtering | 23.2116 | 22.4080 | 23.1373 | 22.4268 | 21.4834 | 21.0023 | Nonlocal means | 29.4155 | 27.0736 | 31.3181 | 28.2534 | 23.7273 | 23.0137 | BM3D | 29.1443 | 26.9120 | 32.0590 | 28.6197 | 21.7645 | 21.2712 | Proposed method | 39.1414 | 34.8926 | 41.2256 | 35.7943 | 31.4041 | 30.0693 | | Image 10 () | Image 11 () | Image 12 () | Adaptive wavelet | 29.4247 | 27.5268 | 26.7443 | 25.4201 | 15.9075 | 16.9781 | Bilateral filtering | 23.6728 | 23.0581 | 22.2984 | 21.7973 | 22.7751 | 22.6673 | Nonlocal means | 30.3106 | 27.9794 | 28.7439 | 26.6227 | 17.4105 | 17.2673 | BM3D | 30.8146 | 28.3780 | 31.8744 | 28.4922 | 31.0366 | 30.1990 | Proposed method | 40.2191 | 35.9371 | 38.7096 | 35.0295 | 24.4256 | 25.7756 |
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