04310827 is referenced by 116 patents and cites 9 patents.

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 connection with adjacent feature points that are present in a predetermined neighborhood of the reference feature point. Each count is decided by the number of streaks or ridges intervening between the reference feature point and a related feature point that is nearest to the reference feature point among the feature points in a predetermined sector of the neighborhood.

Title
Device for extracting a density as one of pattern features for each feature point of a streaked pattern
Application Number
6/136610
Publication Number
4310827
Application Date
April 2, 1980
Publication Date
January 12, 1982
Inventor
Koh Asai
Tokyo
JP
Agent
Sughrue Mion Zinn Macpeak and Seas
Assignee
Nippon Electric
JP
IPC
G06K 9/46
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