Method of and system for enrolling and matching biometric data

Abstract

A system and method is disclosed for comparing biometric image data to a stored enrollment template that may comprise collecting a set of biometric image data for a biometric object image from a biometric object imaging sensor; storing the biometric object image data in a memory as an enrollment template for further comparison to find a match with subsequently imaged biometric object image data; collecting a subsequent set of biometric image data for a biometric object image from the biometric object imaging sensor; updating the enrollment template; determining if a limited enrollment window remains open; and repeating the collecting of a subsequent set of biometric data step if the enrollment window remains open. Determining if the enrollment window remains open may be by determining the existence of one of a stability indicator and an instability indicator.

What is claimed is: 
     
         1 . A method of comparing biometric image data to a stored enrollment template comprising:
 collecting a set of biometric object image data for a normal biometric object image from a biometric object imaging sensor;   storing the normal biometric object image data in a memory as a first enrolled template for further comparison to find a match with subsequently imaged biometric object image data;   collecting at least one adjunct set of biometric object image data for a biometric object image at a periphery of the normal biometric object image from the biometric object imaging sensor;   collecting a subsequent set of biometric object image data for a biometric object image of a biometric of a user for comparison with the first enrolled template;   if a match is not found with the first enrolled template, utilizing at least one of a second enrolled template formed using the first enrolled template and the at least one adjunct set of biometric object image data and stored in a memory or formed by supplementing the normal biometric object image with the at least one adjunct set of biometric image data at the time of matching, in order to determine if a match exists.   
     
     
         2 . The method of  claim 1  further comprising:
 collecting the at least one adjunct set of biometric object image data for a biometric object image at a periphery of the normal biometric object image by a user positioning the biometric object in a non-normal position with respect to the biometric object imaging sensor. 
 
     
     
         3 . The method of  claim 2  further comprising:
 the non-normal position comprises at least one of rolling the object left or right, rolling the object up or down or tapping the object on the sensor randomly. 
 
     
     
         4 . The method of  claim 2  further comprising:
 the non-normal position comprises at least one of moving the object in a circular motion, moving the object in rectangular motion, moving the object in a zigzag motion and moving the object in a swipe motion over a normally non-swiped sensor or a misaligned or misdirected swipe motion over a normally swiped sensor. 
 
     
     
         5 . The method of  claim 1  further comprising:
 determining that a substantial portion of the stored normal biometric object image data for a substantial portion of the first enrolled template is present in the collected subsequent set of biometric object image data before either comparing the at least one of a second stored enrolled template or a supplemented normal biometric object image created at the time of the matching is performed. 
 
     
     
         6 . The method of  claim 1  further comprising:
 utilizing the determination that a substantial portion of the stored normal biometric object image data for a substantial portion of the first enrolled template is present to determine which of a portion or portions is missing in order to select either the at least one of a second stored enrolled template or the adjunct set of biometric object image data to use to supplement the first enrolled template for comparison with the collected subsequent biometric object image data.