Extração semi-automática de rodovias em um par de imagens aéreas digitais utilizando geometria epipolar e programação dinâmica
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Abstract
The purpose of this paper is to introduce a methodology for semi-automatic road extraction from aerial digital image pairs by using dynamic programming and epipolar geometry. The method uses both images from where each road feature pair is extracted. The operator identifies the corresponding road featuresand s/he selects sparse seed points along them. After all road pairs have been extracted, epipolar geometry is applied to determine the automatic point-to-point correspondence between each correspondent feature. Finally, each correspondent road pair is georeferenced by photogrammetric intersection. Experiments were made with rural aerial images. The results led to the conclusion that the methodology is robust and efficient, even in the presence of shadows of trees and buildings or other irregularities.
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Keywords
Dynamic programming, Epipolar geometry, Roads, Semi-automatic road extraction, aerial photography, digital image, digital photogrammetry, pattern recognition, road
Language
Portuguese
Citation
Boletim de Ciencias Geodesicas, v. 12, n. 1, p. 19-35, 2006.
