cv::String dataPath = "/home/zx/ClionProjects/convertIndex/rgb/"; //"./rgbd_dataset_freiburg1_desk/rgb/"
dataPath = dataPath ;
vector<cv::String> imageNames;
glob(dataPath,imageNames,false);
文件路径用绝对路径
原文：https://www.cnblogs.com/zxzmnh/p/12450911.html