Patent ID: 6996291

Claim:
A method for determining a location of a peak of a first correlation function generated by comparing a first image to a second image, at least one of the first and second images acquired such that the image features of that at least one image are smeared, the method comprising: comparing one of the at least one smeared image to itself at a first plurality of offset positions, the first plurality of offset positions corresponding to a first set of correlation function value points of an auto-correlation function that are distributed around a zero-offset position of that smeared image relative to itself; analyzing values of the plurality of correlation function value points of the first set to identify at least one width value for a peak portion of the auto-correlation function for the smeared image; determining at least a smear magnitude based at least partially on the at least one width of the peak portion of the auto-correlation function for the smeared image; determining, based at least on the determined smear magnitude, at least one potential location of the peak of the first correlation function to a first resolution.