Method and apparatus for measuring three-dimensional shape of object

Abstract

A method for determining the three-dimensional characteristics of an object, comprising the steps of illuminating at least a surface portion of the object with radiant energy, the radiant energy being directed through a color pattern to provide a first color image, the color pattern including a plurality of substantially vertical color strips, each of the color strips having varying hue; obtaining at least one first two-dimensional image of the illuminated surface portion of the object at a first position, the illuminated surface portion including the first color image; illuminating the surface portion of the object with a second light, the second light comprising substantially white light, the second light providing a second light image; obtaining at least one second two-dimensional image of the surface portion of the object illuminated by the second light, the two-dimensional image being obtained at the first position; determining the originated hue in the color pattern at a plurality of points in the first color image; determining a tag for each of the points in the color image; determining the position of each of the points on a respective one of the tags, and triangulating the point positions to generate a three-dimensional model of the surface portion of said object.

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