Patent ID: 7385637

Claim:
A method for correcting image defects of an image sensor, said image sensor comprising a matrix of pixel detectors, the method comprising an acquisition step for acquiring a black image I N , wherein the method comprises: an acquisition step for acquiring a first image I 1 by the operation of a first radiation for which the sensor functions in a linear detection zone; an acquisition step for acquiring a second image I 2 by the operation of a second radiation of an intensity greater than that of the first radiation and for which the sensor functions in a linear detection zone; a calculation step for calculating a mean value R m , such that: Rm = 1 N ⁢ ∑ i , j ⁢ I 2 ⁡ ( i , j ) - I N ⁡ ( i , j ) I 1 ⁡ ( i , j ) - I N ⁡ ( i , j ) , wherein I k (i,j) represents the value of the pixel of the image I k detected by the pixel detector situated at the intersection of the row i and the column j of the detector pixel matrix, and N represents the total number of pixels of the matrix; a calculation step, wherein a first reference image I R1 is calculated such that the first reference image is written as: I R1 =( R m ×I 1 −I 2 )/( R m −1); and a use of the first reference image I R1 as the black image I N so that the defects of the image sensor are corrected with the first reference image I R1 .