Method of processing an image

G - Physics – 06 – T

Patent

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G06T 5/00 (2006.01)

Patent

CA 2626310

A method of processing an input image produces an output image emphasising peak-like structures. The input image comprises input pixels and each input pixel has an intensity characteristic. The output image comprises corresponding output pixels and each output pixel has a value. The method comprises the step of calculating for an input pixel the second derivative of the intensity characteristic in two orthogonal directions, one of the directions being the direction of maximum curvature. The product of the two second derivatives is calculated and the value of the output pixel corresponding to the input pixel is determined in dependence on the product.

L'invention concerne un procédé de traitement d'image d'entrée permettant de produire une image de sortie accentuant les structures de type crête. L'image d'entrée comprend des pixels d'entrée, chaque pixel d'entrée possédant une caractéristique d'intensité. L'image de sortie comprend des pixels de sortie correspondant, chaque pixel de sortie possédant une valeur. Ledit procédé consiste: à calculer pour un pixel d'entrée une seconde dérivée de caractéristique d'intensité dans deux sens perpendiculaires, l'un des sens étant l'incurvation maximum. On calcule le produit des deux secondes dérivées et on détermine la valeur du pixel de sortie correspondant au pixel d'entrée en fonction dudit produit.

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