A digital image of a surface of a check is received. A check scanning device captures the digital image as the check moves through the check scanning device. A fingerprint is impressed on the surface of the check. A computing system uses the digital image to determine a match score. The match score
A digital image of a surface of a check is received. A check scanning device captures the digital image as the check moves through the check scanning device. A fingerprint is impressed on the surface of the check. A computing system uses the digital image to determine a match score. The match score represents an approximate probability that the fingerprint on the check matches a reference fingerprint. An alert is presented based on the match score.
대표청구항▼
1. A method comprising: receiving a digital image of a surface of a check, wherein a fingerprint is impressed on the surface of the check, wherein the digital image has a resolution of 500 dpi or less;using, by a computing system, the digital image to determine a match score, the match score represe
1. A method comprising: receiving a digital image of a surface of a check, wherein a fingerprint is impressed on the surface of the check, wherein the digital image has a resolution of 500 dpi or less;using, by a computing system, the digital image to determine a match score, the match score representing a probability that the fingerprint on the check matches a plurality of reference fingerprints stored in a database, wherein using the digital image comprises: applying one or more image enhancing processing operations to a fingerprint image, the fingerprint image being a digital image containing the fingerprint; andusing the fingerprint image to determine the match score; andpresenting an alert based on the match score. 2. The method of claim 1, wherein presenting the alert comprises: instructing a cashier to segregate the check for subsequent analysis when the match score exceeds an alert threshold; andinstructing the cashier to complete a transaction involving the check when the match score is below the alert threshold. 3. The method of claim 1, wherein the digital image is a grayscale image. 4. The method of claim 1, wherein using the digital image comprises: applying one or more image processing operations to the fingerprint image; andusing the fingerprint image to determine the match score. 5. The method of claim 1, wherein applying the one or more image processing operations comprises: applying one or more image processing operations that reduce artifacts caused by movement of the check through a check scanning device that generated the digital image. 6. The method of claim 1, wherein the method further comprises: detecting a fiducial mark on the check; andwherein applying the one or more image processing operations comprises: using the fiducial mark during performance of at least one of the image processing operations. 7. The method of claim 1, wherein using the digital image further comprises: after applying the one or more of image processing operations to the fingerprint image, calculating a fingerprint image quality metric of the fingerprint image, wherein the fingerprint image quality metric of the fingerprint image is a measure of an expected accuracy in representing the fingerprint; andadjusting the match score based on the fingerprint image quality metric. 8. The method of claim 1, wherein using the digital image comprises: using the fingerprint image to generate a target fingerprint template that represents the fingerprint; andcalculating the match score by comparing the target fingerprint template and a given reference fingerprint template, the given reference fingerprint template representing the reference fingerprint; andwherein presenting the alert comprises presenting the alert when the match score exceeds an alert threshold. 9. The method of claim 1, wherein the method further comprises: storing a plurality of reference fingerprint templates, each reference fingerprint template representing a fingerprint of a different person, the plurality of reference fingerprint templates including a reference fingerprint template representing the reference fingerprint; andwherein using the digital image comprises: generating a target fingerprint template of the fingerprint from the digital image; andcalculating match scores by comparing the target fingerprint template with the plurality of reference fingerprint templates until a given match score is calculated that exceeds a search-ending threshold, the match scores representing approximate probabilities that the target fingerprint template matches the reference fingerprint templates; andwherein presenting the alert comprises presenting the alert when the given match score exceeds an alert threshold. 10. The method of claim 9, further comprising: performing a learning process that seeks to reduce a rate of false matches and false non-matches. 11. The method of claim 10, wherein performing the learning process comprises dynamically adjusting the search-ending threshold based on fraud patterns. 12. The method of claim 10, wherein performing the learning process comprises: dynamically adjusting the alert threshold based on local fraud patterns. 13. A computer-readable storage device comprising instructions that, when executed by a processing unit of a computing device, cause the computing device to: receive a digital image of a surface of a check, wherein a check scanning device captures the digital image as the check moves through the check scanning device, wherein a fingerprint is impressed on the surface of the check, wherein the digital image has a resolution of less than 500 dpi;use the digital image to determine a match score, the match score representing an approximate probability that the fingerprint on the check matches a reference fingerprint, wherein use the digital image comprises applying one or more image enhancing processing operations to a fingerprint image, the fingerprint image being a digital image containing the fingerprint; andcause a workstation device to present an alert when the match score exceeds an alert threshold. 14. The computer-readable storage device of claim 13, wherein the instructions, when executed by the processing unit, cause the computing device to: generate a target fingerprint template that represents the fingerprint;store a plurality of reference fingerprint templates in a database, each of the reference fingerprint templates representing a fingerprint of a different person, each of the plurality of reference fingerprint templates representing one of the plurality of reference fingerprints; andcalculate the match score by comparing the target fingerprint template and the reference fingerprint template. 15. The computer-readable storage device of claim 14, wherein the instructions, when executed by the processing unit, further cause the computing device to: search the fingerprint templates in the database for the reference fingerprint that closely matches the fingerprint using a fingerprint analysis system. 16. The computer-readable storage device of claim 13, wherein at least one reference fingerprint represents a fingerprint of a person suspected of committing check fraud. 17. The computer-readable storage device of claim 13, wherein the instructions, when executed by the processing unit, further cause the computing device to: perform a learning process that seeks to reduce a rate of false matches and false non-matches. 18. The computer-readable storage device of claim 17, wherein the learning process comprises dynamically adjusting a search-ending threshold based on fraud patterns. 19. The computer-readable storage device of claim 17, wherein the learning process comprises: dynamically adjusting the alert threshold based on local fraud patterns. 20. The computer-readable storage device of claim 13, wherein the instructions, when executed by the processing unit, further cause the computing device to: store a plurality of reference fingerprint templates;generate a target fingerprint template of the fingerprint from the digital image; andcalculate match scores by comparing the target fingerprint template with the plurality of reference fingerprint templates until a given match score is calculated that exceeds a search-ending threshold, the match scores representing approximate probabilities that the target fingerprint template matches the reference fingerprint templates.
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이 특허에 인용된 특허 (11)
Uhland ; Sr. Joseph C. (Cherry Hill NJ), Check image capture system.
Itoh,Yasufumi; Yumoto,Manabu; Onozaki,Manabu, Image matching device capable of performing image matching process in short processing time with low power consumption.
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