"Metodologias para geração e atualização de mosaicos de fotos aéreas no Projeto ARARA" / Methodologies for generation and updating of aerial photographs mosaics in the ARARA Project

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

The generation of photographic mosaics is an important activity in many areas such as map production, environment monitoring and agricultural management. Photogrammetry, and specially aero-photogrammetry, are the sciences that deal, among other subjects, with mosaic generation using time consuming procedures, making the maintenance and updating of photographic mosaics a difficult and high-cost task. The ARARA Project (Autonomous and Radio Assisted Reconaissance Aircrafts), presents a low cost alternative to acquire aerial photographs. An onboard, small format digital camera can take automatically the photographs used for the mosaic generation. This work proposes a methodology for mosaic generation and updating using oblique, digital, small format aerial photographs taken by ARARA aircraft. Photographs can be corrected both geometrically and radiometrically by orthorectification and digital image processing procedures. The methodology presented in this work avoids the use of ground control points, focusing on the automatic and semi-automatic mosaic generation. An automatic procedure make possible the use of a large number of small format photographs to replace the photographs normally used in conventional aerophotogrammetry.

ASSUNTO(S)

orthophotography automatic updating system of mosaics oblique digital small format aerial photographs mosaico aéreo digital ortofotografia digital aerial mosaic fotografias aéreas oblíquas digitais e de pequeno formato fotogrametria direct and indirect georeferencing sistema de atualização automática de mosaicos georeferenciamento direto e indireto photogrammetry

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