Method and apparatus for optical fingerprint recognition using multiple exposure
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United States of America Patent
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Oct 6, 2015
Grant Date -
Sep 25, 2014
app pub date -
Jun 14, 2013
filing date -
Mar 22, 2013
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Abstract
A method for an optical fingerprint recognition, the method includes scanning a fingerprint image separately using a multiple exposure which allows alternating a short exposure and a normal exposure; determining whether there is an inflow of external light depending on a darkness level of a fingerprint image derived from the normal exposure; and performing a fingerprint recognition using a fingerprint image derived from the short exposure or the fingerprint image derived from the normal exposure in accordance with the determination result as to the inflow of external light.
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