Biometric information correction apparatus, biometric information correction method and computer-readable recording medium for biometric information correction
A technology for biological information and correction equipment, applied in computer parts, computing, image enhancement, etc., to solve the problems of unclear fingerprints, inability to accurately extract, and deterioration of authentication accuracy.
Inactive Publication Date: 2014-05-21
FUJITSU LTD
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For example, when a user presses his or her finger excessively on the sensor, the ridges are squashed and the brightness difference between the pixels corresponding to the ridges and the pixels corresponding to the valleys on the bio-image become smaller, thus making fingerprints less clear
Also, when the surface of the finger is wet or dry, the fingerprint captured on the bioimage may become unclear
As described above, when a biometric image with captured unclear biometric information is used for biometric authentication, the biometric authentication device cannot accurately extract the feature amount representing the feature of the biometric information
Therefore, authentication accuracy has the potential to deteriorate
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[0017] It is desirable to correct biological images to clarify biological information that has been captured on the biological images. Meanwhile, the correction of the biological image may cause artifacts corresponding to the artificial characteristics of the biological information of the biological image. For example, a biological image captured with a fingerprint is corrected so that a false bifurcation point of a ridge line may be generated, or a point that is a bifurcation point of a ridge line may become an end point of the ridge line. Furthermore, when an artifact is generated on, for example, an input biometric image or a registered biometric image, even if the user is the registered user himself, the difference between the input biometric information and the registered biometric information becomes large, and thus the biometric authentication device may fail to authenticate the user. In addition, there is a concern that performance compatibility may decrease when data ...
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The invention discloses a biometric information correction apparatus, a biometric information correction method and a computer-readable recording medium for biometric information correction. The biometric information correction method includes applying a correction process with respect to a first biometric image representing biometric information of a user to enhance a degree of clarity of the biometric information of the user, thereby creating a second biometric image, extracting a first feature amount representing features of the biometric information from the first biometric image and a second feature amount representing features of the biometric information from the second biometric image, calculating a degree of change representing a difference between the first feature amount and the second feature amount, and outputting the first feature amount when the degree of change indicates that an artifact has been created in the second biometric image.
Description
technical field [0001] The present disclosure relates to a bio-information correction device and a bio-information correction method for correcting bio-information captured on a biometric image, and a computer program for bio-information correction. Background technique [0002] A biometric authentication technology has recently been developed that uses biometric information such as fingerprints or palmprints to determine whether an individual is to be authenticated. Biometric authentication technology is widely used in large-scale systems with a large number of registered users such as access management systems, systems for controlling boarders, and national identification systems for small-scale devices used by individuals such as computers or portable terminals system. [0003] For example, when any one of fingers is used as biometric information, the biometric authentication device acquires a biometric image representing a fingerprint as an input biometric image. The b...
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IPC IPC(8): G06K9/00G06F21/31G06T5/00
CPCG06V40/1347G06V10/993G06T7/33G06T5/00G06V10/40G06F21/32
Inventor 安部登树
Owner FUJITSU LTD