Table 6: PSNR, WPSNR, and Normalized Cross-Correlation for watermarked and attacked by “cropping.”

Window sizePSNR (dB)WPSNR (dB)NC

32 × 32 35.084141.13151.0000
64 × 64 24.272330.27611.0000
96 × 96 19.935225.94591.0000
128 × 128 17.527523.53900.9896
160 × 160 16.142622.15540.9793