一种简单有效的彩色图像数字水印算法

An simple and effective digital watermark algorithm for color images

本文提出了一种新的彩色图像数字水印算法。首先将图像转换到,在亮度分量Y中做的分块DCT变换,通过修改中频区域中的DCT系数来嵌入经过置乱操作的二值水印图像信号。嵌入和提取水印时采用了一种量化的方法,在保证算法不可见性的同时又具有较好的鲁棒性。该算法是一种盲水印算法,使用过程中不需要提供任何额外的信息,实现方法简单,性能良好,在实际应用中具有一定的价值。

This paper proposes a new digital watermark algorithm for color images. First, transfer the image into the YCrCb color space and then partition the brightness component Y into 8X8 blocks. After DCT of these blocks, the coefficient in the middle frequency area will be modifed to embed the scrambled binary watermark signal. When embedding and extracting the watermark signal,we use the quantization method. The method in this paper is blind algorithm. It can be implemented very easily and is very effective. It will be used in actual applications.