Method of infrared image processing for non-uniformity correction

An image processing device comprising:

• a memory storing a column vector and a dispersion matrix;
• a processing device adapted to:
• receive an input image captured by a pixel array sensitive to infrared radiation, the pixel array having a plurality of pixel columns, each pixel column being associated with a corresponding reference pixel;
• determine, based on the input image and on the column vector representing column spread introduced by the reference pixels, a first scale factor by estimating a level of said column spread present in the input image;
• generate column offset values based on the product of the first scale factor with the values of said vector;
• determine, based on the input image and on the dispersion matrix representing 2D dispersion introduced by the pixel array, a second scale factor by estimating a level of said 2D dispersion present in the input image;
• generate pixel offset values based on the product of the second scale factor with the values of said matrix;
• and
• generate a corrected image by applying said column and pixel offset values.