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基于离散切比雪夫变换的数字水印

Digital Water Marking Based on Discrete Tchebichef Transform
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摘要 着重分析了常见图像置乱算法的基本特征,给出了一种基于Knight,s tour矩阵和Arnold变换对数字图像进行置乱的算法,分析了图像的离散切比雪夫变换,提出了先对水印进行置乱,然后嵌入原始图像数字水印算法,并用MATLAB R2014B对二维灰度图像进行基于离散切比雪夫变换的数字水印仿真。从仿真结果可以看出,文章提出的数字水印算法提取的水印的PSNR值更高。 The essential features of the normal image scrambling are analyzed and a new digital image scrambling approach based on Knight,s tour matrix and Arnold transform is put forward and the discrete tchebichef transform is analyzed. The process includes watermarking scrambling, embedding original image digital watermarking and digital watermarking realization of two-dimensional grey image with MATLAB R2014 B on the basis of discrete orthogonal tchebichef transform. Realization results indicate that the approach based on discrete tchebichef transform for digital watermarking can extract digital watermark with higher PSNR.
作者 李季 王盾 张学俭
机构地区 宁夏农林科学院农业科技信息研究所
出处 《宁夏农林科技》 2015年第12期112-115,F0003,共5页 Journal of Ningxia Agriculture and Forestry Science and Technology
基金 宁夏农林科学院创新先导基金项目(NKYG-15-14)
关键词 Knight s tour矩阵 ARNOLD变换 离散余弦变换 离散切比雪夫变换 数字水印 PSNR Knight s tour matrix Arnold transform Discrete cosine transform Discrete tchebichef transform Digital water marking PSNR
分类号 TP391 [自动化与计算机技术—计算机应用技术]
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参考文献11

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二级参考文献10

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宁夏农林科技
2015年 第12期

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