Patent ID: 6723992
Filing Date: 2004-04-20
Classification: H04N

Abstract:
Detection arrangement for observing infrared radiation emitting or reflecting objects, comprising a two-dimensional array of NÃ—M detector elements D(i,j), i&lE;N, j&lE;M, arranged in rows and columns; imaging means, for imaging objects and their environment on the array; image processing means, connected to the array, for periodically generating an image-representing two-dimensional matrix of numbers S(i,j), i&lE;N, j&lE;M, and compensation means, for compensating an offset for individual detector elements, characterized in that the compensation means comprise a displacement device, positioned between the imaging means and the array and arranged for displacing the image on the array, and filtering means, incorporated in the image processing means, for generating offset compensating values C(i,j) from at least two images with mutually divergent displacements.