摘要
系统在彩色图像中嵌入二值图像水印,首先对原图像进行离散小波分解,对水印进行二维分块离散余弦变换,根据人眼视觉特性,在图像的中频系数中嵌入水印,提高了水印的鲁棒性和不可见性;利用最小风险假设检验知识进行水印的提取,提取水印时不需要原始图像的配合,是水印的盲提取。实验结果表明:该算法嵌入的水印具有较好的鲁棒性。利用LabVIEW和MATLAB相结合,实现了数字图像盲水印系统,可以完成水印的嵌入与水印的盲提取;监视MATLAB节点运行;以及对图像和水印的评估。该系统可用于数字图像版权保护,进行所有权证明。系统操作方便,升级方便,成本低廉,有良好的推广前景。
The bi-level image watermark can be embedded in a digital image in the system.Using discrete wavelet transform to decompose the original image and making the watermark by two dimension discrete cosine transform block by block,and via the Human Visual Peculiarity a watermark is embed in the intermediate frequency of original image.By doing these,the robustness and invisibility have been improved.When we want to extract the watermark,the minimum risk hypothesis test is used to get it.Because of getting the wa...
出处
《仪表技术与传感器》
CSCD
北大核心
2008年第5期110-112,共3页
Instrument Technique and Sensor
关键词
LABVIEW
人眼视觉特性
盲提取
水印系统
LabVIEW
human visual peculiarity
blind watermark algorithm
watermark system
