초록 ▼

The present invention can achieve the reliability and simplicity in registering a fingerprint by indicating the quality of a fingerprint image by the number of pseudo minutiae, improve the security of an entrance/exit control system to register a fingerprint, detect the direction of ridge lines of a

The present invention can achieve the reliability and simplicity in registering a fingerprint by indicating the quality of a fingerprint image by the number of pseudo minutiae, improve the security of an entrance/exit control system to register a fingerprint, detect the direction of ridge lines of a fingerprint accurately as much as possible, improve the security in checking a fingerprint remarkably, collect renewed registered fingerprint data by a host device and hold the registered fingerprint data of each gate as the latest fingerprint data, improve the operability by enabling to use identification numbers having the less number of digits, and register a fingerprint having a high match rate by automatically applying spatial filtering in re-registering only. A fingerprint registering method according to the present invention detects normal minutiae and pseudo minutiae in a fingerprint pictured by a fingerprint image pickup unit, counts pseudo minutiae in registering windows with normal minutiae at almost the center, determines the average number of pseudo minutiae in registering windows from a total of pseudo minutiae in all registering windows, and registers a fingerprint when the average number of pseudo minutiae is equal to or below a threshold.

대표청구항 ▼

[ What is claimed is:] [1.]1. A fingerprint checking method which registers fingerprint data derived from extraction of minutiae from a fingerprint, checks said registered fingerprint data with fingerprint data for checking an affixed fingerprint, and authenticates personal identification if they ma

[ What is claimed is:] [1.]1. A fingerprint checking method which registers fingerprint data derived from extraction of minutiae from a fingerprint, checks said registered fingerprint data with fingerprint data for checking an affixed fingerprint, and authenticates personal identification if they match, whereina conversion key number is produced by a previously defined function from an entered key number and the content at a prescribed byte in said registered fingerprint data, said conversion key is inserted for storage, at a prescribed byte in said registered fingerprint data, anda key number entered at the time of checking the fingerprint is checked with a key number reconstructed from said conversion key number inserted at the prescribed byte of said registered fingerprint data, and the checking fingerprint data obtained from the affixed fingerprint is checked with said registered fingerprint data.