A Novel Effective Edge-Based Image Denoising Algorithm

Figure 1

Edge-based kernels of order 3 × 3 for all possible edge directions in the image: (a) 0° ≤ θ < 5° and 175° < θ ≤ 180°; (b) 5° ≤ θ < 22.5°; (c) 22.5° ≤ θ < 40°; (d) 40° ≤ θ < 50°; (e) 50° ≤ θ < 67.5°; (f) 67.5° ≤ θ < 85°; (g) 85° ≤ θ < 95°; (h) 95° ≤ θ < 112.5°; (i) 112.5° ≤ θ < 130°; (j) 130° ≤ θ < 140°; (k) 140° ≤ θ < 157.5°; and (l) 157.5° ≤ θ < 175°.

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