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

−0.97352

23.9646

20.3181

barbara

510 × 510

−0.96845

23.6274

20.1075

camera

340 × 340

−0.97294

24.0817

20.4143

flower

256 × 256

−0.97523

24.1745

20.1339

girl

216 × 233

−0.97692

24.3646

20.2102

Iline

1961 × 3553

−0.97614

24.2821

19.9895

university

480 × 640

−0.97551

24.3021

20.554