A method for measuring the shapes of 3-D objects, of which surfaces are composed of various reflection value regions, has been developed. The 3-D coordinates of the object sections are obtained by triangulation with the light-section method using a slit light source and a TV camera. A TV camera having an expanded dynamic range is employed to reduce the influence of uneven reflection surfaces. The TV camera expands a dynamic range by combining plural images captured at different shutter speeds.
A trial 3-D shape measurement system has been produced using the developed method, of which ability and effectiveness of this method were comfirmed by experiments.
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