Optical 3-D measurement with several approximation points

摘要

A pattern is projected to be measured N times at predetermined intervals, with different intensity distributions on the surface of the body. Each point on has a corresponding sequence of N temporary intensity values. The intensity distributions are detected using matrix cameras for determining the grey scale values per pixel. A first approximation point is defined to determine a first measuring point on the surface. The grey scale values in the N images are determined at the projected points by sub pixel interpolation.