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Table 3 Performance under varying number of generations with scale factor K1, PSNR for watermarked images (512 × 512 size) Lena, peppers and lake with NC for extracted watermark cameraman (256 × 256 size)

From: MEO based secured, robust, high capacity and perceptual quality image watermarking in DWT-SVD domain

# generations

Test cases for scale factor(K1)

Watermarked image Lena

Watermarked image peppers

Watermarked image lake

K1

PSNR

NC

K1

PSNR

NC

K1

PSNR

NC

#5

Minimum K1

1.5443

79.8611

0.9728

1.4769

93.2853

0.9791

2.5227

87.8446

0.9773

Average K1

2.1957

65.4463

0.9890

2.2085

73.9911

0.9822

3.1875

73.0528

0.9808

Maximum K1

4.4482

51.9741

1

4.4798

55.2266

1

4.8300

59.5709

1

#10

Minimum K1

1.5498

79.5746

0.9730

1.4769

87.2647

0.9796

2.5227

86.7532

0.9770

Average K1

3.3328

65.8698

0.9877

2.2085

70.7811

0.9838

3.1875

73.0528

0.9808

Maximum K1

3.3328

50.9538

1

4.4798

53.4861

1

4.8300

60.3296

1