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

−0.97377

13.7374

13.2205

barbara

510 × 510

−0.97051

13.7499

13.2581

camera

340 × 340

−0.98386

15.4174

15.0525

flower

256 × 256

−0.9748

13.6479

13.078

girl

216 × 233

−0.97887

14.0148

13.4558

Iline

1961 × 3553

−0.97781

13.769

13.2012

university

480 × 640

−0.97776

14.4049

13.8881