Patent US 4,454,610

Methods and apparatus for the automatic classification of patterns are disclosed in which the intensity or gray level values of selected pixels of digital images of functions of position-invariant transforms of patterns to be classified, displayed as intensity functions, are correlated with one or more stored sets of values, each such stored set of values corresponding to one of the classes into which the unclassified patterns are to be classified. Methods of determining the coordinates of the selected pixels for use in automatic signature verfication and automatic handwritten numeral recognition are disclosed.