Abstract:

For measuring the pipe orifice, a computer vision method is used. The previous curve based stereo method is slow, in which curves in images are used for computing the features of the points and for establishing the point-point correspondence between the left and the right image. A new method is presented. A closed form solution for the global matching criterion of two quadric curves in two images and furthermore and a closed form solution for the global reconstruction of the conics in the scene are presented. It is shown that the matching of two quadric curves can be established globally and the reconstruction can be performed by solving three one variable quadric equations. The experiment results show that the algorithm is robust and can be implemented in real time.

Key words: computer vision, quadric curves, pipe orifice, measuring method