| 摘要 |
<p>A method for processing a deformed fingerprint image is provided. The method comprises the following steps: defining a registration area, of which the center is positioned in the barycentre of the fingerprint, on the original fingerprint image, and obtaining a registration weighting vector by calculation with the image information of the registration area; defining a comparison area, which is larger than the registration area and of which the center is positioned in barycentre of the fingerprint, on the collected fingerprint image; picking up a plurality of comparison matching areas having the same size as the registration area from the comparison area, and obtaining a plurality of comparison weighting vectors by the calculation with the image information of the multiple comparison matching areas respectively; calculating correlation coefficients of multiple comparison weighting vectors and the registration weighting vector respectively; using the maximum correlation coefficient as the fingerprint similarity coefficient; and comparing the fingerprint similarity coefficient with a threshold value, and when the fingerprint similarity coefficient is bigger than the threshold value, determining that the collected fingerprint image and the original fingerprint image come from the same finger. The method adopts a weighting comparison mode to reduce an error caused by the fingerprint deformation, which meets the rule for pressing deformation of human fingerprints and produces a quite good effect.</p> |
