JP2725599B

From an image memory of a fingerprint picture, gradient vectors of the picture are calculated. From the distribution of gradient vectors in a subregion, ridge direction of the subregion is determined, and confidence of the determined direction is also defined.

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Bibliographic Details
Main Author KAMEI TOSHIO
Format Patent
LanguageEnglish
Published 11.03.1998
Edition6
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:From an image memory of a fingerprint picture, gradient vectors of the picture are calculated. From the distribution of gradient vectors in a subregion, ridge direction of the subregion is determined, and confidence of the determined direction is also defined.
Bibliography:Application Number: JP19940138833