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Improved preclassification non local-means (IPNLM) for filtering of grayscale images degraded with additive white Gaussian noise

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Figure

Fig. 1 Boxplot performance comparison of a MAE and b PSNR criteria for standard NL-means algorithm for different windows sizes combinationsand the two weight functions
Fig. 2 Boxplot performance comparison of a SSIM criterion and b processing time for standard NL-means algorithm for different windows sizescombinations and the two weight functions
Fig. 4. The maximum difference between the best and
Fig. 4 The visual results obtained during the evaluation and selection of the patch size, a original Barbara image close-up, b image corruptedwith Gaussian noise of σ = 10, filtered images with different patch size of c 3 × 3, d 5 × 5, e 7 × 7, f 9 × 9, g 11 × 11, and h 13 × 13
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