ROBUST DETECTION AND IDENTIFICATION OF PARTIALLY OCCLUDED CIRCULAR MARKERS

Johannes Koehler, Alain Pagani, Didier Stricker

2010

Abstract

In this paper we present a pipeline for the robust detection of partially occluded circular markers. Compared to square markers, occluded circular tags can be tracked in a more robust way, since the camera pose is in this case computed from the whole contour instead of only the four corners. We introduce a new ellipse detection technique based on a constrained RANSAC algorithm and pre-ellipse fit outlier removal to detect tag candidates with damaged borders. Digital codes are used to identify the actual markers afterwards, since correlation based marker identification approaches are not capable of handling occlusion. The key to error detection and correction is a suitable Reed Solomon code together with a proper code layout on the marker. We show that markers covered up to 30% can be detected, our tracker moreover has a very low risk of false positive marker detection.

Paper Citation

in Harvard Style

Koehler J., Pagani A. and Stricker D. (2010). ROBUST DETECTION AND IDENTIFICATION OF PARTIALLY OCCLUDED CIRCULAR MARKERS . In Proceedings of the International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2010) ISBN 978-989-674-028-3, pages 387-392. DOI: 10.5220/0002850603870392

in Bibtex Style

@conference{visapp10,
author={Johannes Koehler and Alain Pagani and Didier Stricker},
title={ROBUST DETECTION AND IDENTIFICATION OF PARTIALLY OCCLUDED CIRCULAR MARKERS},
booktitle={Proceedings of the International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2010)},
year={2010},
pages={387-392},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002850603870392},
isbn={978-989-674-028-3},
}

in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2010)
TI - ROBUST DETECTION AND IDENTIFICATION OF PARTIALLY OCCLUDED CIRCULAR MARKERS
SN - 978-989-674-028-3
AU - Koehler J.
AU - Pagani A.
AU - Stricker D.
PY - 2010
SP - 387
EP - 392
DO - 10.5220/0002850603870392