Paper Info
Title
Calibration of a free-form mirror for optical 3D measurements using a generalized camera model
Abstract
A new methodology is presented which enables the use of optical free-forms instead of classical beamers for fringe projection based optical 3D surface measurements. Although optical free-forms allow the generation of approximately sinusoidal fringes for phase shifting profilometry, they cannot produce Gray code like pattern for robust phase unwrapping. The principal idea of this work is the consideration of the fringe producing free-form mirror as an optical component of the sensor system which should be used for 3D point calculation. In order to do so, a description of the spatial distribution of the considered rays will be realized. This corresponds to a calibration of the free-form. The approach of a generalized model is used for the calibration instead of selecting a certain camera model as the telecentric or the pinhole model. This generalized camera model will be described in this work.
Year
DOI
Venue
2013
10.1109/ISPA.2013.6703739
ISPA
Keywords
Field
DocType
calibration,computer vision,computerised instrumentation,image sensors,3d point calculation,approximately sinusoidal fringes,free-form mirror calibration,fringe producing free-form mirror,fringe projection based optical 3d surface measurements,generalized camera model,optical free-forms,phase shifting profilometry,pinhole model,robust phase unwrapping,spatial distribution,telecentric model,3d measurement,fringe projection,optical free forms
Image sensor,Computer science,Optics,Gray code,Profilometer,Free form,Calibration,Pinhole camera model,Phase (waves),Structured-light 3D scanner
Conference
ISSN
Citations 
PageRank 
1845-5921
0
0.34
References 
Authors
2
5
Name
Order
Citations
PageRank
Christian Bräuer-Burchardt17914.24
stefan heist200.34
Peter Kühmstedt3216.28
Gunther Notni48115.10
susanne zwick500.34