Abstract
In the field of industrial vision, the three-dimensional inspection of highly
reflective metallic objects is still a delicate task. We deal with a new
automated three-dimensional inspection system based on polarization analysis. We first
present an extension of the shape-from-polarization method for dielectric surfaces
to metallic surfaces. Then, we describe what we believe to be a new way of solving the ambiguity
concerning the normal orientation with an active lighting system. Finally,
applications to shape-defect detection are discussed, and the efficiency of the
system to discriminate defects on specular metallic objects made by stamping
and polishing is presented.
© 2006 Optical Society of America
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