基于小波变换的彩色图像多分量水印嵌入算法

Watermarking Algorithm of Several Components Based on DWT for Color Image

针对彩色图像水印典型算法的不足,利用彩色图像信息量大的特点,提出了一种基于离散小波变换的彩色图像数字水印算法.该算法选择彩色图像的YIQ色彩空间的Y分量和Q分量分别嵌入水印,具有水印嵌入信息量大和隐蔽性好的特点.实验结果表明,该算法对JPEG压缩、滤波、剪切和噪声攻击等都具有一定的鲁棒性.

Being aimed at the deficiency of the color image watermarking algorithm, this paper proposes a digital watermarking embedding algorithm based on Discrete Wavelet Transform （DWT） for color image, by using the larger information characteristic of color image. The original color image is transformed into the YIQ color space, and the watermark was embedded in both Y component and Q component. The algorithm proposed in this paper can contain more embedding intensity and be invisible. The experimental results show that the watermarks are robust against JPEG, filter, crop procession and noise etc.