Object identification

Details Object identification Object identification

G - Physics

06

K

G06K 9/64 (2006.01) G06K 9/00 (2006.01) G06K 9/62 (2006.01)

Patent

CA 2448448

A method of object identification comprising, for an image in which an object is to be identified, determining for each of a set of locations in the image the direction in which the gradient of intensity change to an adjacent location is greatest together with the magnitude of that gradient, modifying the gradient magnitude using a nonlinear function, the modified gradient and the associated direction for the set of location providing a vector representative of the image, and comparing the vector with a previously generated statistical model which provides identification of the object.

L'invention concerne un procédé d'identification consistant, pour une image dans laquelle on doit identifier un objet, à déterminer pour chaque ensemble de localisations contenus dans l'image, la direction dans laquelle la modification du gradient d'intensité d'une localisation adjacente est la plus grande ainsi que l'ampleur de ce gradient, modifiant l'ampleur de ce gradient au moyen d'une fonction non-linéaire. Ce gradient modifié et la direction associée pour l'ensemble de localisation fournissent un vecteur représentatif de l'image et permettent de comparer le vecteur à un modèle statistique préalablement généré qui autorisera l'identification de l'objet.

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