Item – Thèses Canada

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Numéro d'OCLC
29024787
Auteur
Beauchamp, André,1965-
Titre
Système de numérisation assistée par ordinateur des colonnes vertébrales scoliotiques
Diplôme
Thèse (M. Sc. A.)--École polytechnique de Montréal, 1991.
Éditeur
Ottawa : National Library of Canada = Bibliothèque nationale du Canada, 1992.
Description
3 microfiches
Notes
No de commande UMI00358310 de University Microfilms.
Comprend des références bibliographiques
Résumé
A stereoradiographic reconstruction technique has been developed to Ecole Polytechnique de Montreal to obtain the three-dimensional (3D) geometry of the scoliotic spine and rib cage. This technique uses to radiographic views of a patient maintained in a calibration device. This project presents the development of a computer assisted digitization system (CADS) of stereoradiographic images for the identification of different anatomical structures necessary for the 3D reconstruction. This system assists the user in giving him the necessary tools for the digitization of images such as correction of the distortion, interaction for the correction procedure of the points already digitized, automatic searching of markers on the calibration device, etc. The utilization of this new system is twice as faster to digitize a stereopair as the manual technique on a digital table while keeping approximately the same 2D precision. A study has proved that the automatic search has helped to improve the precision of the 3D reconstruction of the calibration device. The CADS primary error source is the image processing device (Vidicon camera). (Abstract shortened by UMI.)
ISBN
031572725X
9780315727250