局部彩色图像的篡改检测与内容修复方法研究

彩色图像的篡改检测与内容修复是一项富有挑战性的研究工作。以四元数指数矩理论为基础，提出了一种适合于彩色图像的局部图像篡改检测与内容修复方法。该方法首先根据四元数指数矩幅值的旋转不变特性，对彩色图像的复制-旋转-粘贴篡改进行检测，以检测出篡改区域和被复制区域；然后结合噪声估计技术对篡改区域与被复制区域进行区分，以定位出篡改区域；最后利用总体变分模型对篡改区域进行修复，以得到修复后的彩色图像。仿真实验表明，该方法具有良好的局部图像篡改检测、定位和自修复能力。

Detectionand self-recovery of copy-move forgery for color image

A copy-move forgery is created by copying and pasting content within the same image ,and potentially post processing it .In recent years ,the detection and self-recovery of copy-move forgeries has become one of the most actively researched topics in blind image forensics ,but most existing ap-proaches are mainly designed for gray images .Based on the quaternion exponent moments theory ,a new detection and self-recovery of copy-move forgery for color image is proposed in this paper .First-ly ,the color image is divided into small image blocks ,the quaternion exponent moments of images blocks are extracted ,and similar blocks are obtained by investigating the similarity of the quaternion exponent moments between the images blocks .Secondly ,similar image blocks are labeled as copied and pasted blocks by using background noise estimation .Finally ,the pasted image blocks are inpaint-ed based on total variation（TV） model .Experimental results show that the proposed method is good at detection ,location ,and self recovery of a color image .