G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 5/00 (2006.01) G06T 5/50 (2006.01)
Patent
CA 2682281
The invention relates to a method for correcting matrix image sensors and more particularly relates to a method for correcting the fixed space noise of the matrix. The method comprises collecting the signal (Sij, n) from each pixel (Pij) during a large number of successive images, determining for each pixel an approached value (Mij) of an average of the signal from the pixel during said large number of images, correcting the signal from each pixel by adding thereto the difference between a reference average value (M0) and the approached average value. The approached average is obtained by determining the upper and lower limit values assumed by the signal from the pixel during the large number of images and by calculating a central value between said high and low limit values.
L'invention concerne les capteurs d'image matriciels, et elle concerne plus particulièrement une méthode pour corriger le bruit spatial fixe de la matrice. On recueille le signal (Sij, n) issu de chaque pixel (Pij) au cours d'un grand nombre d'images successives; on détermine pour chaque pixel une valeur approchée (Mij) d'une moyenne du signal issu du pixel au cours de ce grand nombre d'images; on corrige le signal issu de chaque pixel en lui ajoutant la différence entre une valeur moyenne de référence (M0) et Ia valeur moyenne approchée. La moyenne approchée est obtenue en déterminant des valeurs limites haute et basse prises par le signal issu du pixel au cours du grand nombre d'images, et en calculant une valeur centrale entre ces valeurs limites hautes et basses.
Commissariat A. L'energie Atomique
Marks & Clerk
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