Active lighting applied to three-dimensional reconstruction of specular metallic surfaces by polarization imaging.
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.
Morel
Olivier
O
Laboratoire Electronique, Informatique et Image CNRS, UMR 5158, Le Creusot, France. o.morel@iutlecreusot.u-bourgogne.fr
Stolz
Christophe
C
Meriaudeau
Fabrice
F
Gorria
Patrick
P
D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000295:instrumentation* / Q000379:methods; D008029:Lighting / Q000379:methods*; D008422:Materials Testing / Q000295:instrumentation / Q000379:methods*; D008670:Metals / Q000032:analysis*; D008859:Microscopy, Polarization / Q000295:instrumentation* / Q000379:methods; D010783:Photometry / Q000295:instrumentation* / Q000379:methods; D012542:Scattering, Radiation
D008670:Metals