Image Denoising via Nonlinear Hybrid Diffusion

Figure 8

Lenna image (300×300). (a) Noisy image corrupted by Gaussian noise for 𝜎=50. (b) Original image. (c) Our algorithm by AOS, 𝑘=0.02, 𝜏=2 (12 steps). (d) Our algorithm by PMS, 𝜏=0.25 (154 steps). (e) PM algorithm, 𝐾=9, 𝜏=0.25 (108 steps). (f) TV algorithm, 𝜏=0.1 (650 steps).

(a) Noisy: 𝜎=50, PSNR =14.12

(b) Original

(c) AOS: PSNR = 26.03, MAE = 9.11

(d) PMS: PSNR = 25.60, MAE = 9.46

(e) PM: PSNR = 23.81, MAE = 10.77

(f) TV: PSNR = 24.43, MAE = 9.93