Fingerprint classification arrangement
First Claim
1. A method of generating a classification code for a fingerprint having a pattern of ridges, the ridges including a plurality of reference features, comprisingoverlaying the intersection of a pair of cross-hairs at a first reference feature,overlaying a line between a second reference feature and the first reference feature,rotating the cross-hairs so that the line bisects a quadrant of the cross-hairs,counting the number of ridges crossed by predetermined portions of the cross-hairs, andgenerating the classification code responsive to said ridge counting step.
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Abstract
An arrangement for generating a classification code for a fingerprint having a pattern of ridges, the ridges having a plurality of reference features, which includes overlaying the intersection of a pair of cross-hairs at a first one of the reference features. A line is overlaid from a second one of the reference features to the first reference feature. The cross-hairs are oriented so that the line bisects a quadrant of the cross-hairs. The ridges crossed by predetermined portions of the cross-hairs are counted to generate the classification code.
67 Citations
20 Claims
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1. A method of generating a classification code for a fingerprint having a pattern of ridges, the ridges including a plurality of reference features, comprising
overlaying the intersection of a pair of cross-hairs at a first reference feature, overlaying a line between a second reference feature and the first reference feature, rotating the cross-hairs so that the line bisects a quadrant of the cross-hairs, counting the number of ridges crossed by predetermined portions of the cross-hairs, and generating the classification code responsive to said ridge counting step.
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11. Apparatus for generating a classification code for a fingerprint having a pattern of ridges, the ridges including a plurality of reference features, comprising
means for overlaying the intersection of a pair of cross-hairs at a first reference feature, means for overlaying a line between a second reference feature and the first reference feature, means for rotating the cross-hairs so that the line bisects a quadrant of the cross-hairs, means for counting the number of ridges crossed by predetermined portions of the cross-hairs, and means for generating the classification code responsive to said ridge counting step.
Specification