Using photometric stereo to refine the geometry of a 3D surface model

Jankó, Zsolt (2007) Using photometric stereo to refine the geometry of a 3D surface model. In: VISAPP 2007. Proceedings of the 2nd international conference on computer vision theory and applications. Barcelona, 2007..

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Abstract

In this paper we aim at refining the geometry of 3D models of real objects by adding surface bumpiness to them. 3D scanners are usually not accurate enough to measure fine details, such as surface roughness. Photometric stereo is an appropriate technique to recover bumpiness. We use a number of images taken from the same viewpoint under varying illumination and an initial sparse 3D mesh obtained by a 3D scanner. We assume the surface to be Lambertian, but the lighting properties are unknown. The novelty of our method is that the initial sparse 3D mesh is exploited to calibrate light sources and then to recover surface normals. The importance of refining the geometry of a bumpy surface is demonstrated by applying the method to synthetic and real data.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: 3D modelling, surface bumpiness, photometric stereo
Subjects: Q Science > QA Mathematics and Computer Science > QA75 Electronic computers. Computer science / számítástechnika, számítógéptudomány
Divisions: Geometric Modelling and Computer Vision Laboratory
Depositing User: Eszter Nagy
Date Deposited: 11 Dec 2012 15:29
Last Modified: 11 Dec 2012 15:29
URI: http://eprints.sztaki.hu/id/eprint/5006

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