查询结果:   吴明珠,李兴民.基于离散八元数余弦变换的彩色图像水印算法[J].计算机应用与软件,2016,33(7):294 - 298.
中文标题
基于离散八元数余弦变换的彩色图像水印算法
发表栏目
安全技术
摘要点击数
713
英文标题
COLOUR IMAGE WATERMARKING ALGORITHM BASED ON DISCRETE OCTONION COSINE TRANSFORM
作 者
吴明珠 李兴民 Wu Mingzhu Li Xingmin
作者单位
广州商学院计算机系 广东 广州 511363 华南师范大学计算机学院 广东 广州 510631    
英文单位
Department of Computer,Guangzhou College of Commerce,Guangzhou,511363,Guangdong,China School of Computer,South China Normal University,Guangzhou,510631,Guangdong,China    
关键词
八元数 离散八元数余弦变换 逆变换 彩色图像水印 鲁棒性
Keywords
Octonion Discrete octonion cosine transform Inverse transform Colour image watermarking Robustness
基金项目
国家高技术研究发展计划项目(2012 AA021105);国家自然科学青年基金项目(61402185);广东省育苗工程项目(2013LYM_0118)
作者资料
吴明珠,讲师,主研领域:数字图像处理。李兴民,教授。 [HJ1.8mm] 。
文章摘要
定义离散八元数余弦变换及其逆变换公式,并将其应用于彩色图像的数字水印中。首先,为了提高水印的安全性,利用Arnold变换分别对彩色水印图像的RGBHIS六个分量进行置乱,然后将彩色载体图像的RGBHIS六个分量整体进行离散八元数余弦变换,对置乱后的水印图像分组并分别嵌入到载体图像的各个中频系数中,最后借助离散八元数余弦逆变换公式得到含水印的图像。实验表明,该方法不仅具有较强的抗压缩能力,对噪声、缩放、滤波等攻击处理也具有较好的鲁棒性和不可见性。
Abstract
In this paper we define the formulas of discrete octonion cosine transform and its inverse transform,and apply them in digital watermarking of colour image.First,in order to improve the security of watermark,we use Arnold transform to scramble six components of RGBHIS of colour image with watermarks.Then we exert the discrete octonion cosine transform on six components of RGBHIS of colour carrier image in whole.The scrambled watermark images are grouped afterwards and embedded into the intermediate frequency coefficients of carrier image separately.Finally by means of inverse discrete octonion cosine transform we obtain the image with watermarks.It is indicated by experiments that this algorithm has strong compression resistance capability and has better robustness and invisibility to various kinds of attacks such as noise,scaling and filtering.
下载PDF全文