By Topic

Compensation of thermal errors in vision based measurement systems using a system identification approach

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Handel, H. ; Inst. for Comput. Med., Univ. of Heidelberg, Mannheim

This article presents a method to compensate thermal influences on optical 3D measurement devices which are widely used as high-accurate localisation devices. Thermal expansion caused by ambient temperature changes or by self-heating of the measurement device itself leads to a changing device geometry which in turn can lead to significant positioning errors since an accurate knowledge of the device geometry is essential for triangulation based 3D reconstruction. The changing imaging geometry of the device results in changing camera parameters which can be determined during a calibration step. The dependency between temperature change and the change of the camera parameters can be modeled using system identification methods. The device temperature is considered as the input signal to a linear time invariant (LTI) system and the vector of camera parameters describing the imaging geometry as the corresponding output. Once the model is determined for a specific camera it can be used online to adjust the values of the camera parameters.

Published in:

Signal Processing, 2008. ICSP 2008. 9th International Conference on

Date of Conference:

26-29 Oct. 2008