Fingerprint recognition method, and fingerprint control method and system
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United States of America Patent
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N/A
Issued Date -
Mar 4, 2004
app pub date -
Nov 14, 2002
filing date -
Sep 4, 2002
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a fingerprint recognition method, a fingerprint control method and a fingerprint control system. The fingerprint recognition method includes following steps: calculating a direction field and a quality field of the obtained fingerprint image, and judging whether the fingerprint quality is qualified or not; filtering and bianarizing the image of the qualified fingerprints, and extracting the characteristic data of the fingerprints on the binarized fingerprint image; comparing the extracted characteristic data of the fingerprints with the fingerprints in the fingerprint characteristic data memory, and obtaining the recognition result according to the comparison, wherein, the direction field of the fingerprint image is locally corrected by use of the local preponderance method. The fingerprint control system according to the present invention can be used conveniently, has a low rejection ratio or low mis-recognition ratio, and is of important application value.
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