Fingerprint recognition method, and fingerprint control method and system
First Claim
1. A fingerprint recognition method, comprising steps:
- a. calculating a direction field and a quality field of an obtained fingerprint image, and judging whether the fingerprint quality is qualified or not;
b. filtering and binarizing the image of the qualified fingerprints, and extracting the characteristic data of the fingerprints on the binarized fingerprint image;
c. 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 local preponderance method.
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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.
34 Citations
10 Claims
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1. A fingerprint recognition method, comprising steps:
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a. calculating a direction field and a quality field of an obtained fingerprint image, and judging whether the fingerprint quality is qualified or not;
b. filtering and binarizing the image of the qualified fingerprints, and extracting the characteristic data of the fingerprints on the binarized fingerprint image;
c. 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 local preponderance method. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A fingerprint control system, including:
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a fingerprint collecting subsystem, including a fingerprint image input device for inputting fingerprint images;
a fingerprint recognition subsystem, including a fingerprint image memory, a fingerprint characteristic data memory, and an image processor, said image processor having means for a. calculating a direction field and a quality field of an obtained fingerprint image, and judge whether the fingerprint quality is qualified or not;
b. filtering and binarizing the image of the qualified fingerprints, and extracting the characteristic data of the fingerprints on the binarized fingerprint image;
c. 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, and a driving and executing subsystem for carrying out corresponding control commands according to the recognition results of the fingerprint recognition subsystem.
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Specification