Cameraman

Pepper

Monarch

Parrot

Lena

Barbara

HIO

0.47647

0.62499

0.50991

0.58321

0.56533

0.64094

prDeep

0.95303

0.96719

0.98096

0.96120

0.96561

0.97078

$\alpha =2$

RED-FFDNet

0.91919

0.92341

0.94712

0.89491

0.90700

0.90344

RED-(DnCNN-BM3D)

0.96800

0.97219

0.98417

0.96525

0.97097

0.97736

RED-(DnCNN-FFDNet)

0.95373

0.96904

0.97959

0.96281

0.96916

0.97771

HIO

0.41750

0.55909

0.49224

0.49585

0.45184

0.54067

prDeep

0.89789

0.93591

0.95503

0.90835

0.93148

0.95484

$\alpha =3$

RED-FFDNet

0.90840

0.90763

0.93889

0.88147

0.88290

0.89378

RED-(DnCNN-BM3D)

0.94804

0.95621

0.97272

0.94774

0.94884

0.97067

RED-(DnCNN-FFDNet)

0.93882

0.93809

0.95902

0.92212

0.93527

0.96131