cv::Point3f GetPupilPosition(cv::Mat_<double> eyeLdmks3d){ eyeLdmks3d = eyeLdmks3d.t(); cv::Mat_<double> irisLdmks3d = eyeLdmks3d.rowRange(0,8); cv::Point3f p (mean(irisLdmks3d.col(0))[0], mean(irisLdmks3d.col(1))[0], mean(irisLdmks3d.col(2))[0]); return p; }