摘要
提出了一种在数字图像上实现的盲水印算法,嵌入的水印是64×64×8bit灰度图。该算法用宿主图像的8×8分块的DCT域低频对应系数,进行量化取余的方法嵌入水印。由于引入误差很小,嵌入水印后的宿主图像质量很高,保证了水印的透明性。经仿真检验该算法具有理想的鲁棒性。同时在水印提取时不需要原始图像,只需将对应系数量化取余,检验余数即可。
A new blind watermarking algorithm based on DCT for digital image is proposed, in which a 8 bit gray picture is embedded. The method is that 8 coefficients of the lowest frequency are divided by 14, then the quotients are divided by 2 in order to use the remainders. It’s retrieval does not require original image. The experimental result shows that the embedded watermarking with proposed algorithm is invisible. At the same time, it is robust enough that it can resist attacks of the commonly used image processing methods.
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2005年第3期169-172,共4页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
关键词
数字水印
DCT域
稳健性
置乱
盲提取
digital watermarking
DCT
robustness
scrambling technology
blind detection
