Method for monitoring a two-dimensional or three-dimensional...

G - Physics – 06 – T

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G06T 7/00 (2006.01) G01N 21/88 (2006.01) G06T 7/40 (2006.01)

Patent

CA 2346781

The invention relates to a method for monitoring the distribution of structures on a surface or of particles in space. An optical image of the distribution is produced using video technology, for example. This image is then broken down into pixels, the average brightness of each pixel is determined, and the differences between the brightness values of adjacent pixels are calculated along pre-selected rows. These differential values are recorded on a data carrier and/or output in such a way that a correlation of the differential values with the position of the pixels is preserved on the image. This is used to determine at which points there are inhomogeneities in the distribution of the structures on the surface or the particles in space. The method can be used for example for assessing the homogeneity of surfaces, for detecting surface flaws and for monitoring the opening angle and the homogeneity of a directed spray.

L'invention concerne un procédé qui permet de contrôler la distribution de structures sur une surface ou de particules dans l'espace. Selon le procédé, on génère une image optique bidimensionnelle de la distribution, par exemple par une technique vidéo; on convertit l'image en pixels; on détermine la luminosité moyenne de chaque pixel; et on calcule les différences de luminosité entre pixels adjacents pour des lignes prédéterminées de pixels. Ces valeurs différentielles sont enregistrées et/ou affichées sur un support de données de façon que leur corrélation avec la position des pixels soit conservée sur l'image. A partir de là, on calcule à quels endroits apparaissent des inhomogénéités dans la distribution des structures sur la surface ou des particules dans l'espace. Ce procédé peut être utilisé par exemple pour évaluer l'homogénéité de surfaces, détecter les défauts superficiels ou contrôler l'angle d'ouverture et l'homogénéité d'un jet.

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