Image Denoising via Nonlinear Hybrid Diffusion

Figure 11

Boat image (512×512). (a) Noisy image corrupted by Gaussian noise for 𝜎=50. (b) Original image. (c) Our algorithm by AOS, 𝑘=0.2, 𝜏=2 (15 steps). (d) Our algorithm by PMS, 𝜏=0.25 (170 steps). (e) PM algorithm, 𝐾=9, 𝜏=0.25 (115 steps). (f) TV algorithm, 𝜏=0.1 (710 steps).

(a) Noisy: 𝜎=50, PSNR =14.14

(b) Original

(c) AOS: PSNR = 26.22, MAE = 8.59

(d) PMS: PSNR = 26.02, MAE = 8.68

(e) PM: PSNR = 24.17, MAE = 9.93

(f) TV: PSNR = 25.63, MAE = 8.98