彩色数字水印嵌入技术

The Embedding Technique with Color Digital Watermark

本文提出一种将彩色数字水印嵌入到灰度级图像中的方法 .利用静态图像的压缩编码技术 ,将彩色数字水印编码为一系列二值ID数字 ,以实现水印的嵌入 .由于水印的嵌入过程是基于原始图像的离散余弦变换 (DCT)系数之间的关系 ,所以水印的提取不需要原始图像 .实验结果表明本文提出的数字水印技术 ,经某些图像处理操作和有损压缩后仍是鲁棒的 .

A method of embedding a color digital watermark into a gray level image is proposed.By still image compression coding technique,the color digital watermark is encoded into a series of binary ID numbers for watermarking.The algorithm can extract the watermark without the original image because the embedding process is based on the relationship between the discrete cosine transform (DCT) coefficients of the original image.Experimental results show that the proposed technique is robust against some image processing operations and joint photographic experts group (JPEG) lossy compression.