AUTOMATIC EXTRACTION OF CLOSED CONTOURS IN THE PORTUGUESE CADASTRAL MAPS

Tiago Candeias, Filipe Tomaz, Hamid Shahbazkia

2006

Abstract

The automatic extraction of closed contours is the most important and difficult problem in the automatic recognition of the Portuguese cadastral maps. Many difficulties such as gaps on contour, elements connected on contour, crossing of lines and the association of each entity to its contour have to be solved. In literature there are very few studies about the recognition of cadastral maps and the maps already studied are different than ours. Therefore our research mainly focused on appropriate computer vision algorithms that yield acceptable results. In this paper we present a sequence of algorithms to solve various problems in the contour extraction. The algorithms are completely different and each one tries to solve one specific problem of the analysis. The methods used were the Block-Fill algorithm, the Lohmann’s algorithm, the Seed-Segment algorithm and the Rosin-West’s vectorization algorithm. The architecture of our system is presented and the results are shown at the end of the paper.

Paper Citation

in Harvard Style

Candeias T., Tomaz F. and Shahbazkia H. (2006). AUTOMATIC EXTRACTION OF CLOSED CONTOURS IN THE PORTUGUESE CADASTRAL MAPS . In Proceedings of the First International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, ISBN 972-8865-40-6, pages 428-433. DOI: 10.5220/0001361304280433

in Bibtex Style

@conference{visapp06,
author={Tiago Candeias and Filipe Tomaz and Hamid Shahbazkia},
title={AUTOMATIC EXTRACTION OF CLOSED CONTOURS IN THE PORTUGUESE CADASTRAL MAPS},
booktitle={Proceedings of the First International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP,},
year={2006},
pages={428-433},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001361304280433},
isbn={972-8865-40-6},
}

in EndNote Style

TY - CONF
JO - Proceedings of the First International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP,
TI - AUTOMATIC EXTRACTION OF CLOSED CONTOURS IN THE PORTUGUESE CADASTRAL MAPS
SN - 972-8865-40-6
AU - Candeias T.
AU - Tomaz F.
AU - Shahbazkia H.
PY - 2006
SP - 428
EP - 433
DO - 10.5220/0001361304280433