抵抗图像区域攻击的鲁棒性水印算法
王友卫, 刘元宁, 朱晓冬

Novel robust watermarking algorithm for regional attacks of digital images
WANG You-wei, LIU Yuan-ning, ZHU Xiao-dong
图1 随机四元组分块策略
Fig.1 Random quaternary group blocking policy