1. A system for determining a lowest image resolution for a range of image decimation values for use in processing of images within a machine vision system, the system comprising: a reference image data module for providing a high resolution reference image; an image decimation module for generating a set of decimated images having a reduced resolution based upon the high resolution reference image; an image interpolation module for generating a set of interpolated reference images having a spatial image resolution identical to the high resolution reference image from the set of decimated images; an image cross correlation module for cross-correlating the set of interpolated reference images with the high resolution reference image; and an image selection module for determining the decimated images to be used in a normalized gray scale pattern find process.