Patent ID: 6813035
Filing Date: 2004-11-02
Classification: G01B,G06K

Abstract:
A method for determining three-dimensional surface coordinates comprising the steps of:illuminating an object (3) with a color pattern (9) of known structure by a projector (1) and recording an object image by a camera (2), the color pattern comprising pattern elements (10) that each have a polygonal contour and one color selected from a group of different colors, the color pattern (9) having at least two adjacent rows (4) with a multiplicity of the pattern elements (10), each respective pattern element (10) being distinguishable in color both from an adjacent pattern element (11) within the row and from an adjacent pattern element (10) situated in an adjacent row, and determining the position of each of the pattern elements (10) of the recorded image by determining a respective projection angle (&PHgr;), for each of the pattern elements (10) and by referring to a known relative position between the camera (2) and the projector (1), to determine the three-dimensional surface coordinates of object points considered.