Abstract
A new method is described for accurate and real time measurement of distance to an object. The method determines the distance by the triangulation, in which the parallax is obtained by peak position of the cross correlation between a pair of the object images. A normalized first order momentum of the correlation is used to estimate the position accurately. An experimental apparatus was constructed on the basis of the method with single lenses and photo-diode arrays. It was verified from experimental results that the apparatus could determine the angle of parallax with errors less than 10-4rad.
