Method and apparatus for determining the amount of scattered...

G - Physics – 01 – N

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G01N 21/49 (2006.01) G01B 11/22 (2006.01) G01B 11/24 (2006.01) G01B 11/30 (2006.01) G01N 21/898 (2006.01)

Patent

CA 2680572

The present invention relates to a method and an apparatus for determining the amount of light scattered in an object in a machine vision system comprising: a light source illuminating said object with incident light having a limited extension in at least one direction; and, an imaging sensor detecting light emanating from said object, wherein said emanated light is reflected light (R) on the surface of said object and light scattered (S) in said object, said detected light is resulting in at least one intensity distribution curve on said imaging sensor having a peak where said reflected light (R) is detected on said imaging sensor. A width (w) of said at least one intensity distribution curve around said peak is measured, whereby said measured width (w) indicates the amount of light scattered (S) in said object.

La présente invention concerne un procédé et appareil permettant de déterminer la quantité de lumière diffusée dans un objet dans un système de vision artificielle comportant : une source lumineuse éclairant ledit objet avec une lumière incidente ayant un prolongement limité dans au moins une direction; et un capteur d'imagerie détectant la lumière émanant dudit objet. Ladite lumière émanée est une lumière réfléchie (R) à la surface dudit objet et la lumière diffusée (S) dans ledit objet, ladite lumière détectée entraînant au moins une courbe de distribution d'intensités sur ledit capteur d'imagerie ayant une amplitude maximale où ladite lumière réfléchie (R) est détectée sur ledit capteur d'imagerie. Une largeur (w) de ladite courbe de distribution d'intensité autour de l'amplitude maximale est mesurée, la mesure de ladite largeur (w) représentant la quantité de lumière diffusée (S) dans ledit objet.

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