Patent ID: 6996288

Claim:
A method for calculating shading correction coefficients for an imaging system, comprising the steps of: i. defining a set of calibration regions on a calibration standard; ii. defining a first part and a second part of said calibration standard, wherein each of said first and second parts contains at least one calibration region; iii. taking an image of said calibration standard and calculating an initial image intensity for each of said calibration regions, thereby providing a set of initial image intensities; iv. re-arranging said first and second parts to form a re-arrangement of said calibration standard; v. taking an image of said re-arrangement and calculating a re-arranged image intensity for each of said calibration regions, thereby providing a set of re-arranged image intensities; vi. calculating a shading error for each of said calibration regions; and vii. calculating a shading correction coefficient for each of said calibration regions.