(a) original
(b) noisy f
(c) k=1, PSNR=17.9
(d) k=5, PSNR=15.1
(e)
(f) k=18, PSNR=17.3
(g) k=1, PSNR=22.6
(h) k=2, PSNR=24
(i) k=3, PSNR=22.5
(j) k=5, PSNR=19.7
10
8
||f-uk||2
||f-uk||2
7
noisenorm
noisenorm
norm2 of f and u
norm2 of f and u
9
8
7
6
5
4
k=10, PSNR=18.7
6
5
4
3
2
0
5
(k)
10
k
converge of constant
15
20
1
0
2
(l)
k
4
k
converge of varying
6
8