Fingerprint identification by ridge angle and minutiae recognition

摘要

A raster scanning laser beam and cooperating light detector generate a stream of binary coded data, which data are processed to yield an organized binary pattern of ridge angle data. Location of secondary data representing only one side of the fingerprint ridges is then accomplished and that data is locally stored. As a further descriptor of the print, non-paired ridge endings are identified. While retaining the advantages inherent in ridge angle processing for identification, the recognition system makes use of non-paired selected line end minutiae data as a fine descriptor, comparing the location of such minutiae with respect to predetermined points of the fingerprint pattern, so affording a final assessment of match validity.