This paper presents a novel method of velocity eld estimation for the points on moving contours in a 2-D image sequence. The method determines the corresponding point in a next image frame by considering the curvature change of a given point on the contour. In traditional methods, there are errors in optical ow estimation for the points which have low curvature variations since those methods co...

Nonparametric estimation of interaction functions for twotype pairwise interaction point processes is addressed. Such a problem is known to be challenging due to the intractable normalizing constant present in the density function. It is shown that the means of the marked interpoint distance functions embedded in the two-type pairwise interaction point process converge to the means of an inhomo...

Absolute orientation estimation is one of the key steps in computer vision, and n 2D–3D point correspondences can be used to obtain absolute orientation, which known as perspective-n-point problem (PnP). The lowest number three if there no other information, corresponding algorithm called P3P solver. In practice, real scene may consist some geometric e.g., vanishing point. When scenes contain p...