Dongyan LiuWenbo Liu 0001Gong Zhang 0002An Adaptive Watermarking Scheme Based on Nonsubsampled Contourlet Transform for Color Image Authentication.748-7522008ICYCShttps://doi.org/10.1109/ICYCS.2008.61https://doi.ieeecomputersociety.org/10.1109/ICYCS.2008.61conf/icycs/2008db/conf/icycs/icycs2008.html#LiuLZ08