A integração dos Módulos de Geração do Modelo Digital de Elevações e de Restituição Digital no Projeto E-Foto

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Research areas:
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Year:
2011
Type of Publication:
In Proceedings
Authors:
Editor:
José Carlos Neves Epiphanio, Lênio Soares Galvão
Book title:
Anais do XV Simpósio Brasileiro de Sensoriamento Remoto (Simpósio Brasileiro de Sensoriamento Remoto)
Pages:
2422-2429
Address:
Curitiba, PR
Organization:
Instituto Nacional de Pesquisas Espaciais
Month:
maio
ISBN:
978-85-17-00057-7
Abstract:
This paper presents the improvement and integration of Stereoplotter and Digital Elevation Model Generation (DEM) modules from E-FOTO project, which are responsible for the 3D reconstruction part in the photogrammetric process. The Stereoplotter module was developed aiming at digitizing 3D cartographic features from aerial stereopairs. In this module, the student can create, edit and save points, lines or polygons which will be used later in DEM module as break-lines. Some significant improvements were made in this module, like directly image zooming, maximizing the screen and the possibility of editing end fixing points. Moreover, several bugs were found and fixed. The DEM module was designed to generate the digital terrain model or digital surface model which can be performed by measuring points in a user pre-defined GRID or by the interpolation of 3D points measured previously in the tereoplotter module. An additional image showing the 3D extracting results was added, therefore no 3D viewing engine was developed. Nevertheless, the results of 3D extraction can be exported to Octagon or Matlab for 3D viewing. In order to analyze the accuracy of E-FOTO 3D measuring, we performed a comparison between two sets of 3D points generated from 2D corresponding points from E-FOTO and from Erdas LPS 9.3. The results shown, at 99% of confidence level, that are no significant differences between both software platforms.