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The fingerprint is acquired from a fingerprint scanner. | ||
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Image is improved (better contrast and distinctness). | ||
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Noise and defects are eliminated. | ||
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Fingerprint features are detected and analyzed. | ||
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Minutiae are identified. | ||
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Fingerprint search on database is made based on some measures; so polygons are determined connecting 3 minutiae. Thus, internal angles, sides and each minutia angle are computed. These measures are invariant to rotation and translation.
This method allows that a desired fingerprint can be localized on database even with position variation (displacement and rotation) in relation to the found fingerprint. |
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Desired fingerprint | ||
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Found Fingerprint | ||
