基于异或LSB算法的土地整理中遥感图像防篡改研究

Remote sensing image anti-modification in land consolidation based on XOR LSB algorithm

遥感影像越来越多地应用于土地整理工作中,但关于土地整理中图像的安全保护方式研究却鲜见报道。该文提出了一种适用于土地整理项目中图像安全保护的方法,即在所用图像中嵌入脆弱数字水印,从而保护原始图像的原创性、完整性及版权。该文在传统LSB算法的基础上提出了一种改进的脆弱水印算法。该算法把异或算子引入水印处理中,避免了传统LSB算法易于被提取被识别的缺点。实验结果表明该算法嵌入的水印不论在视觉上还是从统计意义上讲,都具有不易感知性,能有效保护土地整理图像的安全性。

Nowadays,remote sensing image has been more and more applied in land consolidation,but reports about the the security protection of remote sensing image are scare.This paper proposes a new security protection method of embedding fragile digital watermark in images,which is suitable for land consolidation,to protect the originality, integrity and copyright of the original images.This paper also proposes an improved fragile watermark algorithm based on the traditional method of least significant bit(LSB).This algorithm introduces exclusive-OR(XOR)operator in watermark process,thus avoiding the shortcomings of LSB method,such as being easily recognized and extracted.The results illustrate that the embedded watermark is imperceptible to the human vision and statistical significance,and can protect the security of land consolidation images better.