G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 5/00 (2006.01) G06T 5/50 (2006.01) H04N 5/235 (2006.01)
Patent
CA 2682152
The invention relates to matrix image sensors and more particularly relates to a method for correcting the space noise generated by the degradation of the physical properties of the different elementary sensitive points, or pixels, of the matrix. The method comprises determining for each pixel, in an elementary electronic circuit associated with the pixel and by a recursive digital method, an approached value (Mij,n) of an average of the signal (Sij, n) from the pixel during a large number of images, correcting the signal from each pixel based on the determined approached average value and on a reference average value (M0), and transmitting a corrected signal (S*ij,n) outside the circuit associated wit the pixel.
L'invention concerne les capteurs d'image matriciels, et elle concerne plus particulièrement une méthode pour corriger le bruit spatial engendré par la dispersion des propriétés physiques des différents points sensibles élémentaires, ou pixels, de la matrice. On détermine pour chaque pixel, dans un circuit électronique élémentaire associé au pixel, par une méthode numérique récursive, une valeur approchée (Mij,n) d'une moyenne du signal Sij,n issu du pixel au cours de ce grand nombre d'images; on corrige le signal issu de chaque pixel en fonction de la valeur moyenne approchée déterminée et en fonction d'une valeur moyenne de référence (M0), et on transmet hors du circuit associé au pixel un signal corrigé S*ij,n.
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