1. A computer-implemented method for determining an offset vector, said method comprising: obtaining an image of a first feature using a computer system; obtaining an image of a second feature using said computer system; obtaining a combination image of said first feature and said second feature using said computer system; and utilizing a plurality of composite images based on said image of said first feature and said image of said second feature using said computer system to determine using said computer system an accurate offset vector between said first feature and said second feature in said combination image.