Automatic pattern processing system
Patent 4151512 Issued on April 24, 1979. Estimated Expiration Date: 
September 10, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 10, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3582889 3611290 3636513 3699519 Digital processor for extracting data from a binary image Pattern recognition apparatus Patent #: 4015240 InventorsAssigneeApplicationNo. 05/722244 filed on 09/10/1976US Classes:382/125, Extracting minutia such as ridge endings and bifurcations382/197, Directional codes and vectors (e.g., Freeman chains, compasslike codes)382/224ClassificationExaminersPrimary: Boudreau, Leo H.Attorney, Agent or FirmInternational ClassesG07C 9/00 (20060101)G06K 9/00 (20060101) AbstractAn automatic system is described wherein pattern representations of epidermal ridges, such as fingerprints, are uniquely described by the extraction of specific information. Specific information such as ridge contour data, describing the ridge flow in the fingerprint pattern and minutiae data, principally describing ridge endings and bifurcations, are identified and extracted from the fingerprint pattern. Topological data, identifying singularity points such as tri-radii and cores, as well as ridge flow line tracings related to those points are extracted from the ridge contour data. The extracted information is then utilized by the system to automatically perform classification of the fingerprint pattern and/or matching of the fingerprint pattern with patterns stored in a mass file. Identification is automatically achieved by comparing the extracted information with the information stored in the mass file corresponding to previously identified fingerprint patterns. In a simplified version of the automatic system, verification of claimed identity may be achieved by matching the fingerprint pattern with a particular pattern stored in a mass file according to the claimed identity.Other References
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