彩色数字图像的版权保护

Copyright Protection for Digital Color Image

针对彩色数字图像的版权保护问题,提出了基于奇异值分解和离散的小波变换的彩色图像数字水印算法。算法将CIE-RGB色彩模式下的彩色图像转换到CIE-LAB色彩模式,然后将置乱后的水印嵌入到LAB色彩空间的L分量分块的小波分解低频系数的奇异值中。实验证明,该算法能够抵抗剪贴、拼贴、高斯噪声、JPEG压缩缩放、旋转等常用的图像处理的攻击,并且具有良好的不可见性和安全性。

A color image watermarking algorithm based on singular value decomposition （SVD） and discrete wavelet transformation （DWT） are presented to protect the copyright of digital color image. In this algorithm, CIE-RGB color space of color image is converted to the CIE-LAB color space, and then a scrambled watermark is embed into the singular values of wavelet-decomposed low-frequency coefficient of luminance component sub-block in the LAB color space. Experimental results show that the algorithm is robust against the original image process methods such as cut and paste, collage, Gaussian noise, rotation, JPEG compression etc. And have a good invisible and secure.