摘要
针对数字产品的版权保护问题,以离散余弦变换(DCT)和奇异值分解(SVD)为基础,提出了一种新的小波域彩色图像数字水印算法。该算法主要是将水印图像的DCT系数以新的方法嵌入到载体图像中低频小波系数分块奇异值分解的奇异值中。实验结果表明了算法的可行性和有效性,并对加噪、滤波、JPEG压缩、剪切等常见的攻击有良好的鲁棒性,具有较好的实用价值。
For copyright protection of digital products,a new color image watermarking scheme based on DCT and SVD in DWT domain is presented in this paper.The core idea for this method is that the DCT coefficients of the watermarking image are embedded into the SVD of low and middle frequency components.Experimental results show that the proposed algorithm is of feasibility and effectiveness,robustness for common image processing techniques,and thus has fairly good practical value.
出处
《通信技术》
2011年第4期129-131,共3页
Communications Technology
关键词
离散余弦变换
离散小波变换
奇异值分解
彩色图像
discrete cosine transform
discrete wavelet transform
singular value decomposition
color image
