images

size n × m

$\frac{{\Vert denoisedI-noisyI\Vert }^2}{\left(MN\ast sigm{a}^2\right)-1}$

denoised PSNR

noisy PSNR

cameraman

398 × 398

−0.97254

19.8452

17.9764

barbara

510 × 510

−0.96842

19.7739

17.9621

camera

340 × 340

−0.97612

20.7023

18.8938

flower

256 × 256

−0.97468

19.9527

17.9206

girl

216 × 233

−0.9771

20.2027

18.1269

Iline

1961 × 3553

−0.97636

20.0426

17.9203

university

480 × 640

−0.97617

20.5036

18.5907