摘要
介绍了数字水印的产生、发展及其应用,讨论了数字水印的分类,提出了图像的预处理思想,利用MATLAB中的剪切函数、缩放函数,以及调整图像直方图的方法对图像进行预处理,并用MATLAB进行了仿真.实验结果表明:预处理在DCT数字水印算法的前期工作中有较好作用.
This paper introduces the production,the development and the application of digital watermarking,and discusses its classification.The pretreatment of the image is presented,and realized by means of MATLAB＇s imcrop,imresize as well as the adjustment of image＇s histogram,and the simulation is carried on.The experimental result shows that the pretreatment has a good effect on DCT digital watermarking algorithm in preparatory work.
出处
《许昌学院学报》
CAS
2009年第2期90-94,共5页
Journal of Xuchang University
基金
河南省科技攻关计划项目(0624220058)
河南教育厅科技攻关项目(2007520045)
许昌学院青年基金项目(2009094)
关键词
数字水印
预处理
DCT变换
直方图
digital watermarking
pretreatment
discrete cosine transform（DCT）
histogram
