Automatic Correspondences For Photogrammetric Model Building

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Proceedings titleInternational Society for Photogrammetry and Remote Sensing
ConferenceXXth Congress, July 12-23, 2004.
Subjectphotogrammetry; modelling; matching; automation; feature; semi-automation; modélisation; correspondances; automatisation; caractéristique; semi automatisation
AbstractThe problem of building geometric models has been a central application in photogrammetry. Our goal is to partially automate this process by finding the features necessary for computing the exterior orientation. This is done by robustly computing the fundamental matrix, and trilinear tensor for all images pairs and some image triples. The correspondences computed from this process are chained together and sent to a commercial bundle adjustment program to find the exterior camera parameters. To find these correspondences it is not necessary to have camera calibration, nor to compute a full projective reconstruction. Thus our approach can be used with any photogrammetric model building package. We also use the computed projective quantities to autocalibrate the focal length of the camera. Once the exterior orientation is found, the user still needs to manually create the model, but this is now a simpler process.
Publication date
AffiliationNRC Institute for Information Technology; National Research Council Canada
Peer reviewedNo
NRC number47392
NPARC number8913151
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Record identifiercd6008a5-e818-46d8-8e2c-c428e0d6bdb8
Record created2009-04-22
Record modified2016-05-09
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