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Planar homography: accuracy analysis and applications

Projective homography sits at the heart of many problems in image registration. In addition to many methods for estimating the homography parameters (R.I. Hartley and A. Zisserman, 2000), analytical expressions to assess the accuracy of the transformation parameters have been proposed (A. Criminisi et al., 1999). We show that these expressions provide less accurate bounds than those based on the earlier results of Weng et al. (1989). The discrepancy becomes more critical in applications involving the integration of frame-to-frame homographies and their uncertainties, as in the reconstruction of terrain mosaics and the camera trajectory from flyover imagery. We demonstrate these issues through selected examples

IEEE

Author: Negahdaripour, Shahriar
Prados Gutiérrez, Ricard
García Campos, Rafael
Abstract: Projective homography sits at the heart of many problems in image registration. In addition to many methods for estimating the homography parameters (R.I. Hartley and A. Zisserman, 2000), analytical expressions to assess the accuracy of the transformation parameters have been proposed (A. Criminisi et al., 1999). We show that these expressions provide less accurate bounds than those based on the earlier results of Weng et al. (1989). The discrepancy becomes more critical in applications involving the integration of frame-to-frame homographies and their uncertainties, as in the reconstruction of terrain mosaics and the camera trajectory from flyover imagery. We demonstrate these issues through selected examples
Document access: http://hdl.handle.net/2072/58665
Language: eng
Publisher: IEEE
Rights: Tots els drets reservats
Subject: Geometria projectiva
Imatges -- Processament
Visió per ordinador
Computer vision
Image processing
Projective geometry
Title: Planar homography: accuracy analysis and applications
Type: info:eu-repo/semantics/article
Repository: Recercat

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