基于Contourlet变换和子空间投影的非对称数字水印
何密,成礼智
Asymmetric watermarking based on Contourlet transform and subspace projection
Mi HE,Li-zh CHENG
通信学报 . 2009, (4): 27 -34 .  DOI: 1000-436X(2009)04-0027-08