计算机工程与应用2011，Vol.47Issue(12)：84-86,89,4.DOI:10.3778/j.issn.1002-8331.2011.12.025
图像拟仿射变换的DWT水印算法
Digital watermarking algorithm based on DWT and quasi affine transformation.
摘要
Abstract
It presented an digital watermarking algorithm based on DWT and quasi affine transformation. The algorithm uses quasi affine transformation to encrypt the watermark image in a limited integer field. Because quasi affine transformation has a good effect of the charateristics of scrambling and a longer period of scrambling. It is more secure than the common transformation,like Arnold and other geometric transformations.It extracts a number of blocks from the original image using chaotic sequence,and forms a new sub-image using those blocks,then makes the sub-image go to three wavelet transformations.The encrypted watermarking image is embedded into the sub-image, then the blocks of the sub-image are put into the original position in the original image. Experimental results show that this algorithm is robust and stable to common digital image processing operations.关键词
拟仿射变换/离散小波变换/混沌序列/数字水印Key words
quasi aftime transformation/Discrete Wavelet Transform(DWT)/chaotic sequence/digital watermarking分类
信息技术与安全科学引用本文复制引用
林晓圆,赵健,谢瑜,余秋菊..图像拟仿射变换的DWT水印算法[J].计算机工程与应用,2011,47(12):84-86,89,4.基金项目
中国博士后科学基金(No.20060401007) （No.20060401007）
陕西省自然科学基础研究项目(No.2007F38). （No.2007F38）
