α = 2

α = 3

PSNR

MSSIM

TIME

PSNR

MSSIM

TIME

HIO

2.0882

0.00390

0.9428

0.9458

0.02759

1.3303

prDeep

1.3624

0.00007

0.6164

1.1336

0.00044

0.3000

RED-FFDNet

3.0767

0.00032

1.3422

3.3689

0.00044

1.9187

RED-(DnCNN-BM3D)

1.0756

0.00004

61.8910

0.8769

0.00010

58.5650

RED-(DnCNN-FFDNet)

0.9370

0.00013

0.3302

0.8942

0.00017

7.0197