Method for automatically defining regions of interest for...

Details Method for automatically defining regions of interest for... Method for automatically defining regions of interest for...

G - Physics

06

T

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

Patent

CA 2505194

A method and apparatus for an automated system to extract a high quality signature from an image having areas not relevant for specific identification purposes which can lead to misleading image signatures, the method comprising: identifying at least one region of interest within the image by determining local orientation information at each pixel position in the image, the at least one region of interest comprising elements useful for the specific identification purposes; creating and applying a mask for the image wherein only the at least one region of interest is exposed; extracting a signature for the image taking into account the at least one region of interest exposed by the mask.

L'invention concerne un procédé et un appareil grâce auxquels un système automatisé peut extraire une signature de haute qualité d'une image présentant des zones non pertinentes aux fins d'une identification spécifique et pouvant déboucher sur des signatures d'image trompeuses. Le procédé consiste à: identifier au moins une zone d'intérêt à l'intérieur de l'image, par détermination d'informations d'orientation locales à chaque position de pixel dans l'image, ladite (lesdites) zone(s) d'intérêt comprenant des éléments utiles pour ladite identification spécifique; créer et appliquer un masque pour l'image dans laquelle uniquement la (les) zone(s) d'intérêt est (sont) exposée(s); extraire une signature de l'image en prenant en compte ladite (lesdites) zone(s) d'intérêt exposée(s) par le masque.

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