Method and apparatus for discriminating latent fingerprint optical fingerprint input apparatus
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United States of America Patent
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Apr 26, 2005
Grant Date -
Feb 12, 2004
app pub date -
Oct 24, 2002
filing date -
Apr 29, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A method and an apparatus for distinguishing a latent fingerprint is provided to prevent a fingerprint recognition apparatus from mis-recognizing a latent fingerprint as a fingerprint of a biomass due to a fingerprint residual on an imaging surface of an optical fingerprint input apparatus. According to the present invention, there is provided a backlight control device for controlling switching on and off of the backlight; an image acquisition device for acquiring a fingerprint image without illuminating the backlight onto the imaging surface; a fingerprint detection device for detecting the existence of a fingerprint from the image acquired by the image acquisition device; and a device for determining that the fingerprint, if detected by the fingerprint detection device, is a latent fingerprint detected due to an external light.
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