Automatic Digital Terrain Model Extraction using multiple Images

• Grant number: 10/14444-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2011
• End date: February 28, 2013
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geodesy
• Principal Investigator: Antonio Maria Garcia Tommaselli
• Grantee: Raquel Alves de Oliveira
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Generation of Digital Terrain Models (DTM) from optical image is explored for many years and has been developed with the computational evolution, becoming increasingly necessary for all applications where the surface elevation knowledge is necessary. New techniques for the matching process using images are emerging and providing interesting results for research and also for the commercial sector. However, commercials photogrammetry softwares are limited to codes already implemented, it is not flexible to test different techniques and adapt them. In this context, the aim of this project is to study and implement techniques for the DEMs generation that is still in development, such as the use simultaneously of multiple images in the matching process using the Vertical Line Locus method. The matching precision increases by using the intersection of several beams, more than two, instead of a pair of images as usual in classic methods. The implementation will be made in the program ARMOD-DTM. The code of matching images method, Semi-Global Matching (SGM), will be inserted and adapted in this program. The SGM is a recent technique which attracted much academic and commercial interest due to excellent results in the search for homologous points. To investigate the resulted model quality it will be compared to DTM data generated from laser scanning. An analysis will be done to verify the most appropriate methods and thresholds for the correlation of multiple images.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

RAQUEL ALVES DE OLIVEIRA; ANTONIO MARIA GARCIA TOMMASELLI. Avaliação de uma técnica para geração de modelos digitais de superfície utilizando múltiplas imagens. Bol. Ciênc. Geod., v. 20, n. 2, p. 257-278, 2014-06-00. (10/14444-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

OLIVEIRA, Raquel Alves de. Geração automática de modelos digitais de superfícies utilizando múltiplas imagens. 2013. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências e Tecnologia. Presidente Prudente Presidente Prudente.