Fractional-Order Total Variation Image Restoration Based on Primal-Dual Algorithm

Figure 6

Relation among the iteration, PSNR, and primal-dual gap on the noisy Lena image with 𝜎=10, 𝜎=20, and 𝜎=30.

(a) Relation between the iteration and PSNR

(b) Relation between the iteration and primal-dual gap