一种新的改进Patchwork算法的彩色数字水印研究

本文提出了一种将彩色数字水印嵌入到彩色载体图像的新算法,利用改进的Patchwork方法将一级小波分解的水印图像的低频部分分别四次嵌入到经过离散余弦变换和离散小波变换后的载体图像的RGB分量中,提取的时候,将四次嵌入的低频分量取出并求平均值,用来作为水印的最终低频分量。经过实验验证,该算法对很多攻击具有很好的鲁棒性。

Research on a New Color Digital Watermarking with Improved Patchwork Algorithm

This paper proposes a new algorithm to embed digital color watermark into color vector images.The algorithm uses improved patchwork method to embed the low frequency part of level wavelet decomposition of watermark into the RGB components of the image carrier after discrete cosine transform and discrete wavelet transform for four times. When extracting watermarking, it needs to take out the four embedded low frequency components and average them, and then the averaged components were used as the final frequency component of the watermark. Experimental results show that the algorithm has a good robustness against many attacks.