基于彩色LBP的隐蔽性复制-粘贴篡改盲鉴别算法

Covert Copy-move Forgery Detection Based on Color LBP

现有的复制–粘贴盲鉴别算法大多忽略图像彩色信息,导致对隐蔽性篡改方式的检测率较低,基于此,本文提出一种基于彩色局部二值模式(Color local binary patterns,Co LBP)的隐蔽性复制–粘贴盲鉴别算法.算法首先对彩色图像进行预处理,即建立彩色LBP纹理图像,从而实现彩色信息与LBP纹理特征的融合;其次重叠分块并提取灰度共生矩阵(Gray level co-occurrence matrix,GLCM)特征;最后,提出改进的kd树和超平面划分标记split搜索方法,快速匹配图像块,并应用形态学操作去除误匹配,精确定位复制–粘贴区域.实验结果表明,本算法对隐蔽性复制–粘贴篡改定位准确,并对模糊、噪声、JPEG重压缩后处理操作有很好的鲁棒性.

Since negligence of color information in detecting copy-move forgeries leads to low accuracy in detection of in covert tampering, a novel method using color local binary patterns（CoLBP） is proposed. It involves the following three steps： first, establish color LBP texture image, which is a preprocessing of image and a combination of color information and LBP texture; second, divide into overlapping blocks and extract gray level co-occurrence matrix（GLCM）features; finally, match image blocks by the improved kd tree and split partition, remove the false matched blocks using morphological operation and then detect the resulting copy-move regions. Experimental results show that our algorithm is effective for covert tampering, and exhibits high robustness even when an image is distorted by blur, noise and JPEG recompression.