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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