qr_solve          518 modules/calib3d/src/epnp.cpp     qr_solve(&A, &B, &X);
qr_solve           53 modules/calib3d/src/epnp.h   void qr_solve(CvMat * A, CvMat * b, CvMat * X);
qr_solve          585 modules/calib3d/src/upnp.cpp     qr_solve(A, B, X);
qr_solve           96 modules/calib3d/src/upnp.h       void qr_solve(cv::Mat * A, cv::Mat * b, cv::Mat * X);