opencv 保存图片imwrite

保存图片 

CV::Mat src = CV: : imread(imagePath[i], cv: : IMREAD_REDUCED_COLOR_2);
std::cout <<  src.size() <<  std::endl;

std: :vector<int>  compression_params;
compression_params. push_back(cv: : IMWRITE_JPEG_QUALITY);
compression_params .push_back(100);
CV: : imwrite(imagePath[i], src, compression_params);