摘要
在遥感影像水印算法研究中,针对几何变换、压缩、加噪等常见的图像攻击方式研究的较多,而抵抗亮度调整攻击的水印算法研究较少.亮度调整对遥感影像的空间特征不会产生影响,但会破坏嵌入到遥感影像中水印信息的同步性,从而导致水印检测失败,这给遥感影像水印算法提出了新的挑战.本文从遥感影像版权保护的角度出发,提出了一种改进的基于遥感影像线性亮度调整的水印检测算法.首先,阐述了遥感影像线性亮度调整的特点;然后,分析了基于映射机制水印嵌入算法中两个参数随着亮度调整变化的规律性,构建了基于参数线性特征和映射机制的水印检测算法;最后,对改进的水印检测算法进行了实验验证.实验对比结果表明,该算法能够有效抵抗常见的影像处理方式的攻击,对亮度调整攻击也具有好的鲁棒性.
During the process of research about watermark algorithm for remote sensing image,more attentions have been paid to those kinds of attacking on image such as geometric transformations,compression,noise,etc. On the other hand, the investigation on watermarking algorithms for anti-attacking brightness adjustment is still rare. Adjusting the brightness will not affect the spatial characteristics of remote sensing image, but will destroy the synchronism of watermarking information embedded in remote sensing image,and result in the detection failure of watermarking. Therefore,it brings new challenges to the watermarking algorithms of remote sensing images. In this paper,an improved watermark detecting algorithm is proposed with the requirements of protection for remote sensing images. Firstly,the linear characteristics of brightness adjustment are described. Then the principles of changing in two parameters of mapping mechanism based algorithm with brightness adjustment are analyzed. In consequence, the watermark detecting algorithm based on linear characteristics of parameters and mapping mechanism is deduced. Finally, the experiments are given to verify the performance of the improved watermark detecting algorithm. The experimental results show that the proposed algorithm can anti-attack the common attacking on images,and offer good robustness for attacking from brightness adjustment.
出处
《南京师范大学学报（工程技术版）》
CAS
2014年第3期52-56,共5页
Journal of Nanjing Normal University(Engineering and Technology Edition)
基金
国家自然科学基金(41301413)
江苏省自然科学基金(BK20130903)
江苏省高校自然科学研究项目(12KJB420002)
测绘遥感信息工程国家重点实验室资助项目(12I02)
关键词
遥感影像
水印检测
线性特征
亮度调整
remote sensing image
watermarking detection
linear characteristics
brightness adjustment
