摘要
标注水印为数字多媒体的便捷使用提供了一种新的途径。提出了1种结合独立分量分析(ICA)和离散余弦变换(DCT)的数字图像标注水印盲提取算法。该算法先将载体图像重采样成2个极为相似的子图,再分别将其分解成互不重叠的8×8子块,并进行离散余弦变换,接着将经过置乱后的水印嵌入到余弦变换的中频系数上,最后进行逆余弦变换得到嵌有水印的图像。采用ICA技术进行水印提取。实验表明,该算法有效可行。
Caption watermarking is a new convenient way to use the digital multimedia.A blind scheme of digital image caption watermarking based on the independent component analysis（ICA） and discrete cosine transform（DCT） is proposed.Firstly,the cover image is sampled into two very similar sub-images.Secondly,the sub-images are decomposed into non-overlapping 8×8 blocks.Thirdly,these blocks are transformed into discrete cosine domain.Then the watermark is embedded into its middle frequency coefficient which has been rearranged by Scramble before embedded.Finally,we get image which is embed watermark by IDCT.It use the technique of ICA when the watermark is extracted.The results of emulation indicate this algorithm is available and feasible.
出处
《电子测量技术》
2011年第6期40-42,共3页
Electronic Measurement Technology
基金
福建省自然科学基金(2009J01301)资助
关键词
盲水印
标注水印
独立分量分析
离散余弦变换
blind watermarking
caption watermarking
independent component analysis
discrete cosine transform
