Infrared system for 3D scanning of metallic surfaces

Olivier Aubreton (1) , Alban Bajard (1) , Benjamin Verney (1) , Frederic Truchetet (1)

1 Le2i - Laboratoire Electronique, Informatique et Image [UMR6306]

Many experimental techniques and many com- mercial solutions have been proposed to realize non-contact 3D digitization of industrial objects. Unfortunately, the per- formances of active 3D scanners depend on the optical prop- erties of the surface to digitize. That is why the results obtained by active 3D triangulation on specular or transparent surfaces are not as good as those obtained on diffuse surfaces. In this paper, we present the developments we have realized to address highly reflective metallic surfaces. These develop- ments are based on the extension of a technique, called "Scan- ning from heating" and initially dedicated to glass material. In comparison to conventional active triangulation techniques that measure the reflection of visible radiation, we measure here the thermal emission of a surface, which is locally heated by a laser source. We describe in this paper the successive steps we have followed to adapt Scanning From Heating to metallic materials, to evaluate the performances and finally to develop an operational prototype.

Mots clés: 3D Scanning; Infrared; Scanning from heating; Specular surfaces; Prototype

Domaines: Traitement du signal et de l'image [eess.SP]; Vision par ordinateur et reconnaissance de formes [cs.CV]; Traitement du signal et de l'image [eess.SP]

Olivier Aubreton, Alban Bajard, Benjamin Verney, Frederic Truchetet. Infrared system for 3D scanning of metallic surfaces. Machine Vision and Applications, 2013, 24, pp.1513-1524. ⟨10.1007/s00138-013-0487-z⟩. ⟨hal-00864695⟩