读取文件夹下所有图像.jpg

 string file_path = 
   "H:\\图像处理模板\\c++\\CmakeBuildOpenCVPrj\\Pic\\PillingImages\\Simple_Color_Images\\SC1\\Grades_three\\";
  /*"H:\\图像处理模板\\c++\\CmakeBuildOpenCVPrj\\Pic\\Test\\";*/
  string search_path = file_path + "*.jpg";
  vector<cv::String> file_list;
  vector<Mat> images;
  glob(search_path, file_list, false);
  Mat src;
for (size_t i = 0; i < file_list.size(); i++)
  {
   string imageFilePath = file_list[i];
   src = cv::imread(imageFilePath);
}