1. Apparatus for determining the finish of the surface of a workpiece, comprising: a source of illumination; means for passing the workpiece into proximity with said source of illumination; means for generating a digitized image of the workpiece and storing digitized pixels of said image; storage means for maintaining data corresponding to various preselected surface finishes; and means for comparing said digitized pixels with said data and determining from such comparison the finish of the surface of the workpiece.