Method and device for object recognition

Details Method and device for object recognition Method and device for object recognition

G - Physics

01

N

G01N 21/88 (2006.01)

Patent

CA 2353976

The invention relates to a method and a device for recognizing objects and especially for recognizing defects in workpieces, preferably shot cores or core packets. According to said method the object is illuminated by a light source and recorded or detected by means of a camera. The data obtained from the recording are processed by computer and possibly stored. The invention is characterized in that the object is illuminated from different directions or angles by at least two light sources and in that the camera records the object and the shadows resulting from illumination.

L'invention concerne un procédé et un dispositif de reconnaissance d'objet, notamment de détection de défauts sur des pièces à usiner, de préférence, sur des noyaux (1) ou des paquets de noyaux soufflés. L'objet est éclairé par une source lumineuse (4) et enregistré ou détecté par une caméra (3). Les données acquises par l'enregistrement sont traitées par l'ordinateur et éventuellement mémorisées. L'invention est caractérisée en ce que l'objet est éclairé par au moins deux sources lumineuses (4) de différentes directions ou sous différents angles et en ce que la caméra (3) enregistre l'objet et les ombres engendrées par l'éclairage.

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