Title :
A real-time model-based method for 3-D object orientation estimation in outdoor scenes
Author :
Foresti, G.L. ; Regazzoni, C.S.
Author_Institution :
Dept. of Math. & Comput. Sci., Udine Univ., Italy
Abstract :
This letter presents a new method for real-time determination of the three-dimensional (3-D) orientation, i.e., the rotation angle with respect to one of the principal object axes, of a moving known object from a monocular image sequence. The method is composed by three steps: 1) extraction of the morphological skeleton from binary images, 2) projection of the skeleton function on two planes and its analytical approximation by nonuniform rational B-splines, and 3) comparison with a set of data stored into a model database. Several experiments performed on real images prove the method´s validity.
Keywords :
feature extraction; image representation; image sequences; mathematical morphology; motion estimation; real-time systems; splines (mathematics); 3D object orientation estimation; analytical approximation; binary images; monocular image sequence; morphological skeleton extraction; moving known object; nonuniform rational B-splines; outdoor scenes; real images; real-time model-based method; rotation angle; skeleton function projection; three-dimensional orientation; Data mining; Image analysis; Image databases; Image sequences; Layout; Roads; Shape; Skeleton; Spline; Traffic control;
Journal_Title :
Signal Processing Letters, IEEE
