Patent ID: 7233352

Claim:
A method of correcting color-dependent vignetting in a digital camera, the method comprising: providing, for each color that said camera can image, a raw array of data corresponding to an image of a desired scene; providing a plurality of candidate first sets of polynomial coefficients, each first set representing calibration polynomials that describe second sets of color-specific arrays of calibration coefficients, respectively, the calibration coefficients being appropriate to at least one combination of parameter values to which the camera could have been set when the respective raw arrays were captured; determining values of operating parameters to which parameters of the camera were adjusted when the respective raw arrays were captured; selecting a first set from among the plurality of candidates based upon the determined values; and changing the raw arrays according to the selected first set such that the array for each color exhibits substantially the same amount of vignetting so as to reduce color-dependent vignetting in a composite image based upon each of the changed arrays.