Patent ID: 8248477

Claim:
A method of calibrating, compressing and decompressing image signal values of an image sensor which has a plurality of light sensitive pixels arranged in rows and columns, comprising the steps: reading out the image signal values; compressing the image signal values; decompressing the compressed image signal values; and calibrating the image signal values by using calibration data sets which includes a number of calibration values for each pixel, wherein each calibration data set includes at least one first calibration value and at least one second calibration value; wherein the calibration of the image signal values includes a first calculation step which is carried out before the step of compressing the image signal values to calculate partly corrected image signal values while using the at least one first calibration value; and wherein the calibration of the image signal values includes a second calculation step which is carried out after the step of decompressing the image signal values to calculate fully corrected image signal values while using the at least one second calibration value.