opencv中imdecode的几行代码备份

        string faceStr;
        faceStr = base64_decode(faceImage); //faceImage是base64格式的jpg图片，
        std::vector<unsigned char> faceVec(faceStr.begin(), faceStr.end());
        cv::Mat faceBgr = cv::imdecode(faceVec, CV_LOAD_IMAGE_COLOR);
        cv::imwrite("./receive.jpg", faceBgr);