Cover image name

α = 1, β = 1

α = 1, β = 2

EC (bits)

ER (bpp)

SSIM

PSNR (dB)

EC (bits)

ER (bpp)

SSIM

PSNR (dB)

Panel a

Lena

667,947

2.548

0.9943

39.26

799,802

3.051

0.9912

38.11

Peppers

665,818

2.530

0.9944

38.58

797,937

3.044

0.9919

37.57

Boat

674,691

2.574

0.9938

37.32

806,296

3.076

0.9918

36.63

Jet

665,409

2.538

0.9929

38.28

796,637

3.039

0.9883

37.48

Splash

658,841

2.513

0.9914

38.16

790,046

3.014

0.9861

37.32

Baboon

699,727

2.669

0.9956

35.97

831,709

3.173

0.9946

35.43

Tiffany

665,562

2.539

0.9924

39.29

796,903

3.040

0.9924

38.25

Elaine

669,477

2.554

0.9947

39.68

801,186

3.056

0.9927

38.54

Couple

675,311

2.576

0.9952

37.97

806,691

3.077

0.9934

37.14

Average

671,420

2.560

0.9939

38.28

803,023

3.063

0.9914

37.39

Cover image name

α = 1, β = 3

α = 2, β = 1

EC (bits)

ER (bpp)

SSIM

PSNR(dB)

EC (bits)

ER (bpp)

SSIM

PSNR (dB)

Panel b

Lena

935,756

3.570

0.9808

35.35

799,796

3.051

0.9912

38.15

Peppers

934,567

3.565

0.9825

35.12

797,927

3.044

0.9917

37.59

Boat

940,248

3.587

0.9847

34.55

806,216

3.075

0.9919

36.61

Jet

928,517

3.542

0.9706

35.05

796,643

3.039

0.9882

37.45

Splash

921,817

3.516

0.9683

34.95

790,005

3.014

0.9861

37.29

Baboon

960,037

3.662

0.9907

33.79

831,288

3.171

0.9946

35.46

Tiffany

929,241

3.545

0.9746

35.54

796,893

3.040

0.9883

38.25

Elaine

935,520

3.569

0.9854

35.69

801,306

3.057

0.9926

38.51

Couple

939,471

3.584

0.9873

34.94

806,727

3.077

0.9935

37.10

Average

936,130

3.571

0.9805

35.00

802,978

3.063

0.9909

37.38

Cover image name

α = 2, β = 2

α = 3, β = 1

EC (bits)

ER (bpp)

SSIM

PSNR (dB)

EC (bits)

ER (bpp)

SSIM

PSNR (dB)

Panel c

Lena

935,830

3.570

0.9808

35.39

935,721

3.569

0.9807

35.38

Peppers

930,307

3.549

0.9826

35.24

930,439

3.549

0.9825

35.23

Boat

940,185

3.587

0.9843

34.55

940,190

3.587

0.9846

34.59

Jet

928,554

3.542

0.9701

35.02

928,518

3.542

0.9705

35.02

Splash

921,888

3.517

0.9685

34.96

921,880

3.517

0.9686

34.96

Baboon

960,035

3.662

0.9908

33.84

964,208

3.678

0.9908

33.78

Tiffany

929,242

3.545

0.9746

35.53

929,185

3.545

0.9746

35.33

Elaine

935,455

3.568

0.9854

35.68

935,387

3.568

0.9853

35.69

Couple

939,466

3.584

0.9873

34.87

939,535

3.584

0.9873

34.88

Average

935,662

3.569

0.9805

35.01

936,118

3.571

0.9805

34.98