MODELAGEM MATEMÁTICA DAS DEFORMAÇÕES GEOMÉTRICAS DE UM DESKTOP SCANNER VISANDO SUA APLICAÇÃO NA FOTOGRAMETRIA
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Abstract
Este trabalho trata da calibração geométrica de desktop scanners e sua
aplicação em fotogrametria. Foram testadas metodologias no intuito de parametrizar
as distorções geométricas causadas pelo sistema óptico-mecânico do equipamento
no processo de conversão de imagens analógicas em digitais. Verificou-se a
influência de tais distorções na orientação interior e exterior de aerofotos. O estudo
apresenta dois métodos de correção de todas as foto-coordenadas das imagens
digitalizadas e um método para geração de imagens geometricamente corrigidas. O
equipamento estudado é um EPSON 1640XL, com resolução de hardware de 1600
dpi, utilizando uma placa de calibração de um estéreo restituidor WILD A10.
Mathematical modelling of geometric deformations of a desktop scanner and its
application in photogrametry
Abstract
This work presents some results about desktop scanner geometric
calibration and its application to photogrammetry. Some methodologies was tested
in order to set parameters for geometric distortions caused by analogue to digital
image conversion process. This influence of this distortions in the interior and
exterior orientation of aerial photographs was verified. This study presents two
methods for correcting every photo-coordinates of the scanned image and one
method for generating geometrically corrected image. The device studied is an
Epson 1640XL, with 1600 dpi hardware resolution, using a WILD A-10 stereoplotter
calibration glass plate.
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