计算机科学 ›› 2019, Vol. 46 ›› Issue (10): 180-185.doi: 10.11896/jsjkx.180901688
包晓安1, 林晓东1, 张娜1, 徐璐1, 吴彪2
BAO Xiao-an1, LIN Xiao-dong1, ZHANG Na1, XU Lu1, WU Biao2
摘要: 针对目前人脸识别系统中存在易被人脸照片、人脸视频等方式攻击的问题,提出了一种应用融合色彩纹理特征的人脸防欺骗检测算法。目前,主要的人脸防欺骗检测算法分为用户配合式检测与静默式检测。针对如今火热的在线认证系统,静默式活体检测因具有良好的用户体验性以及分类结果的精确性,成为了该领域的热门研究方向。不同于当前静默式活体检测算法中较为流行的基于亮度特征以及图像质量分析的活体检测方法,文中在验证了色彩特征信息对区分活体人脸与虚假人脸的有效性的基础上,充分地研究了局部纹理特征的特性,并提出了一种结合亮度特征、色彩特征以及局部纹理特征的特征提取融合算法。首先,通过seetaFace人脸检测算法定位人脸及人眼坐标,并利用人眼坐标信息提取仅包含人脸的图像,以减少周围背景图像的干扰;其次,通过转换色彩空间的方式分离图像中的色彩信息和亮度信息,利用色道分离的方式有效地提取纹理特征;最后,采用融合局部纹理特征的提取方法在不同色道上提取特征,并将各通道提取的特征向量联合为一个特征向量,运用支持向量机(Support Vector Machine,SVM)训练分类器。将所提算法在MSU,CASIA,OULU标准人脸活体检测数据集中进行实验,实验结果表明,算法的性能良好,在分类准确率上取得了良好的效果。
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