Image Denoising via Nonlinear Hybrid Diffusion

Figure 7

Lenna image (300×300). (a) Noisy image corrupted by Gaussian noise for 𝜎=35. (b) Original image. (c) Our algorithm by AOS, 𝑘=0.02, 𝜏=2 (8 steps). (d) Our algorithm by PMS, 𝜏=0.25 (96 steps). (e) PM algorithm, 𝐾=7, 𝜏=0.25 (84 steps). (f) TV algorithm, 𝜏=0.1 (400 steps).

(a) Noisy: 𝜎=35, PSNR =17.21

(b) Original

(c) AOS: PSNR = 27.45, MAE = 7.77

(d) PMS: PSNR = 27.03, MAE = 8.08

(e) PM: PSNR = 25.55, MAE = 8.98

(f) TV: PSNR = 26.87, MAE = 8.23