Image Denoising via Nonlinear Hybrid Diffusion

Figure 9

Boat image (512×512). (a) Noisy image corrupted by Gaussian noise for 𝜎=20. (b) Original image. (c) Our algorithm by AOS, 𝑘=0.2, 𝜏=2 (4 steps). (d) Our algorithm by PMS, 𝜏=0.25 (47 steps). (e) PM algorithm, 𝐾=5, 𝜏=0.25 (55 steps). (f) TV algorithm, 𝜏=0.1 (194 steps).

(a) Noisy: 𝜎=20, PSNR =22.11

(b) Original

(c) AOS: PSNR = 29.93, MAE = 5.73

(d) PMS: PSNR = 29.75, MAE = 5.76

(e) PM: PSNR = 28.64, MAE = 6.22

(f) TV: PSNR = 29.13, MAE = 5.97