G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 5/00 (2006.01)
Patent
CA 2469915
The invention concerns a method which consists in processing in a central unit (4) the digitized image (1) obtained by sensing noisy radiation. The image (1) is considered as a table of pixel intensity values, which is broken down into p elementary tables of n pixels so as to subsequently order them into a processing table with p lines of n columns; applying to said table a factorial analysis method, to deduce therefrom the n significant factors; then reconstituting a reconstructed processing table taking into account the most significant factors, and in deducing therefrom a reconstituted image wherein the high-frequency noise is reduced, maintaining a satisfactory contrast.
Selon l'invention, on traite dans une unité centrale (4) l'image numérisée (1) obtenue en captant des rayonnements bruités. L'image (1) est considérée comme un tableau de valeurs d'intensité de pixels, que l'on décompose en p tableaux élémentaires de n pixels pour ensuite les ordonner en un tableau de traitement à p lignes de n colonnes. On applique à ce tableau une méthode d'analyse factorielle, pour en déduire les n facteurs significatifs. On reconstruit ensuite un tableau reconstruit de traitement en prenant en compte les facteurs les plus significatifs, et on en déduit une image reconstituée dans laquelle le bruit à haute fréquence est réduit, conservant un contraste satisfaisant.
Goudreau Gage Dubuc
Hannequin Pascal
LandOfFree
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