ros中的opencv默认安装的是opencv.3.3.1,其位置为:/usr/share/opencv/haarcascades/ 将第一行代码进行修改,修改为: string cascadeName = "/usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml"; //string cascadeName = haar_file_face; CascadeClassifier cascade; if( !cascade.load( cascadeName...