“…In addition, the first pair affects the stability and accuracy of the modelling system. Rather than directly measuring base-high ratio, roundness test exploiting camera EOPs along with the generated sparse 3D points of a stereo model is employed (Beder and Steffen 2006;Hess-Flores, Recker, and Joy 2014). By two-view geometry, the relative positions and rotational angles of two cameras can be estimated using either fundamental or essential matrix (Hartly 1995;Nister 2004); 3D points belonging to a certain image pair can also be computed.…”