Fig. 4From: Improved preclassification non local-means (IPNLM) for filtering of grayscale images degraded with additive white Gaussian noiseThe visual results obtained during the evaluation and selection of the patch size, a original Barbara image close-up, b image corrupted with 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 × 13Back to article page