THREEDIMENSIONAL TRACKING USING OBJECT DEFOCUS - In Twodimensional Scanning Electron Microscope Images

Christian Dahmen

2009

Abstract

This paper proposes a tracking algorithm for the extraction of threedimensional position data from SEM images. An algorithm based on active contours with region-based minimization is chosen as basis for twodimensional tracking. This algorithm is then augmented by the incorporation of defocus analysis to estimate the out-of-focus displacement of the object. To solve the ambiguity of the out-of-focus displacement, the astigmatism of the SEM images is used. The separate calculation of variances for the rows and columns of the image enables a successful direction estimation. With the information on the direction, the out-of-focus displacement and the working distance of the acquired image, the distance of the object to the electron gun can be calculated. In combination with the twodimensional part of the tracking, a full threedimensional coordinate set is generated. The approach is tested and evaluated using a positioning setup and the principal feasibility is shown.

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Paper Citation


in Harvard Style

Dahmen C. (2009). THREEDIMENSIONAL TRACKING USING OBJECT DEFOCUS - In Twodimensional Scanning Electron Microscope Images . In Proceedings of the 6th International Conference on Informatics in Control, Automation and Robotics - Volume 1: ICINCO, ISBN 978-989-674-000-9, pages 72-78. DOI: 10.5220/0002209200720078

in Bibtex Style

@conference{icinco09,
author={Christian Dahmen},
title={THREEDIMENSIONAL TRACKING USING OBJECT DEFOCUS - In Twodimensional Scanning Electron Microscope Images},
booktitle={Proceedings of the 6th International Conference on Informatics in Control, Automation and Robotics - Volume 1: ICINCO,},
year={2009},
pages={72-78},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002209200720078},
isbn={978-989-674-000-9},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 6th International Conference on Informatics in Control, Automation and Robotics - Volume 1: ICINCO,
TI - THREEDIMENSIONAL TRACKING USING OBJECT DEFOCUS - In Twodimensional Scanning Electron Microscope Images
SN - 978-989-674-000-9
AU - Dahmen C.
PY - 2009
SP - 72
EP - 78
DO - 10.5220/0002209200720078