Figure 7From: Nonblind and Quasiblind Natural Preserve Transform Watermarking(a) Cropping performance of optimum location embedding, together with the extracted logo.α = 0.99, NCORR = 1 and SNR = 39 .23 dB. (b) Cropping of top embedded Cameraman image, together with the text. α = 0.99.Back to article page