摘要
基于对数极坐标映射(LPM),设计了图像数字水印技术中的模板匹配检测方法。该模板匹配检测方法的特点是:在图像数字水印的嵌入过程中,从对数极坐标域中切取一块模板匹配信息;计算该模板匹配信息与加入水印后的图像在LPM域中的相位谱的相关系数来进行水印的检测工作。这种方法不使用原始图像的全部信息,减少了相关性检验的计算时间,提高了工作效率。实验结果表明该方法对图像中数字水印具有较强的检测能力。
Based on log-polar mapping （LPM）, a detecting method of the matching template for digital image watermarking is designed. In this detecting method of the matching template, a block of data is cut as matching template from the LPM domain during the watermark embedding process, then, this matching template and the LPM of the watermarked image are used to calculate their correlation values and identify the digital watermark in the digital images. This detecting method is used to reduce computing times of the correlativity verify and improve the work efficiency. Experimental results demonstrate that the detecting method is very useful for digital image watermarking.
出处
《计算机工程与设计》
CSCD
北大核心
2007年第9期2076-2078,共3页
Computer Engineering and Design
基金
广东技术师范学院教授启动课题基金项目(2005-2006)
关键词
图像数字水印
对数极坐标映射
模板匹配
检测方法
相关系数
digital image watermarking
log-polar mapping
matching template
detecting method
correlation values
