User-assisted indentification of object boundaries in a...

G - Physics – 06 – T

Patent

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G06T 7/60 (2006.01) G06T 5/00 (2006.01)

Patent

CA 2232783

A computer-implemented method identifies a boundary path of an object in a displayed raster image by sampling user input to define cursor positions in the raster image and to determine tunnel width parameters corresponding to the cursor positions. The boundary path is identified by applying a cost function that evaluates pixel values of pixels the raster image within limits defined by the tunnel width parameters and determines pixels defining the boundary path.

L'invention concerne une méthode de mise en oeuvre automatisée qui identifie le contour d'un objet dans une image ligne par ligne affichée. La méthode y parvient en échantillonnant les entrées de l'utilisateur pour définir les positions du curseur et pour déterminer les paramètres de largeur du tunnel correspondants aux positions du curseur. Le contour est identifié en appliquant une fonction coût qui évalue les valeurs de pixel des pixels de l'image ligne par ligne à l'intérieur des limites définies par les paramètres de largeur du tunnel et qui détermine les pixels définissant le contour.

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