1
Koh Asai: Device for extracting a density as one of pattern features for each feature point of a streaked pattern. Nippon Electric, Sughrue Mion Zinn Macpeak and Seas, January 12, 1982: US04310827 (116 worldwide citation)

In addition to positions and directions of feature points of a streaked pattern, such as minutiae of a fingerprint on a background, a plurality of novel counts and a density are automatically extracted for each feature point selected as a reference feature point. The density is determined in connect ...


2
Koh Asai, Hiroyuki Izumisawa, Katsuaki Owada, Seiichiro Kinoshita, Shunji Matsuno: Method and device for matching fingerprints with precise minutia pairs selected from coarse pairs. NEC Corporation, Sughrue Mion Zinn Macpeak & Seas, February 24, 1987: US04646352 (56 worldwide citation)

A pair candidate list (73) is formed by selecting minutia pairs with reference to a minutia list (71) showing original position and direction data given for minutiae by principal coordinate systems preliminarily selected on a search and a file fingerprint and those relation data of the minutiae whic ...