Dalotto, Roque Sanchez
XIX ISPRS Congress — PAPER 966 POSTER SESSION
Digital correlation experiences applied to close range photogrammetry
Prof. M.Eng. Roque A. Sánchez Dalotto'
Prof. Dr. Carlos Loch?
Prof. Dr. Hans-Peter Báhr?
'Universidade Federal de Santa Catarina (UFSC)
Doutorando Programa de Pós-Graduagáo em Engenharia Civil
Área de Cadastro Técnico Multifinalitário e Gestào Territorial
Cx. Postal 476 - Campus Universitário
88040-900 Florianópolis (SC), Brasil
E-mail: sanlotto@hotmail.com
"Universidade Federal de Santa Catarina (UFSC)
Laboratório de Fotogrametria, Sensoriamento Remoto e Geoprocessamento
Cx. Postal 476 - Campus Universitário
88040-900 Florianópolis (SC), Brasil
E-mail: loch@ecv.ufsc.br
‘Universität Karlsruhe
Institut für Photogrammetrie und Fernerkundung
Englerstra&e 7, 76131 Karlsruhe, Deutschland
E-mail: baehr@ipf. bau-verm.uni-karlsruhe.de
ABSTRACT
It was developed a program based on correlated statistical methods dedicated to automatic
detection of features on structures, facades, monuments and vehicles imagery.
When applied to close range photogrammetry, results obtained using this correlation tool
reached expected results.
Applying the "moving window" procedure, displacing an user defined exploration matrix or
"kernel" over a search matrix or image, the program calculates the correlation coefficient at
each position. Coordinates of the point with maximum correlation are stored in an ASCII file
that can be used by other photogrammetric or CAD softwares.
In order to control the application's computational effi iciency, a computer-designed pattem
image was used, with well-known marks coordinates and parameters. On the other hand,
real images, obtained by hi-resolution analogic and digital devices were also used. |
Correlation determinations in a large number were carried out to verify program results. |
Numeric determinations, including statistical tests, were made in order objectively quantify
the change of correlation coefficient related to exploration matrix size.
Keywords: automatic detection — correlation — international co-operation.
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B5. Amsterdam 2000.
