Reconstruction of depth information is a common task in industrial
inspections as measurement of mechanical components or for surface
inspection. This paper presents a new approach for a real-time
self calibrating stereo based system. The concept is based on
calculating the difference-map of registered stereo images that
contains qualitative depth information. The principle is valid for
a variety of applications; a prototype for a 3D code reader is
presented in detail. Experimental results from a laboratory
prototype demonstrate the full functionality of the system
concept.
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