Method and system for biometric image assembly from multiple partial biometric frame scans
First Claim
1. A method for generating a composite biometric image from a plurality of acquired frames, the method comprising:
- using a sensor to acquire a new frame of a portion of a biometric; and
using a processor forcomparing the acquired new frame with at least one earlier acquired frame by performing normalized cross-correlation to determine if any registration alignment exists therebetween,augmenting the at least one earlier acquired frame with the acquired new frame if any registration alignment is determined to exist therebetween, andrepeating the acquiring, comparing, and augmenting until the composite biometric has been generated.
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Accused Products
Abstract
Method and system for reconstructing seamless fingerprint image from set of image slices, or frames, from fingerprint swipe sensor. Robust normalized cross-correlation procedures are used for frame evaluation and image matching. Efficient use of device processing resources including memory by keeping only data frames that indicate moving finger and discards frames where no finger exists at sensor during acquisition or finger has not moved since last frame was acquired. Capability to adjust sensor settings during acquisition process to obtain optimal results. Logic ensures operation across different physical systems and sensor characteristics with varying acquisition speeds. Statistics regarding resulting reconstructed image and finger swiping process are computed and embedded in reconstructed image and are useful to the downstream fingerprint matching system, and by embedding in image, inventive system and method ensure that any fingerprint processing system can use information if when called upon to do so.
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Citations
16 Claims
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1. A method for generating a composite biometric image from a plurality of acquired frames, the method comprising:
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using a sensor to acquire a new frame of a portion of a biometric; and using a processor for comparing the acquired new frame with at least one earlier acquired frame by performing normalized cross-correlation to determine if any registration alignment exists therebetween, augmenting the at least one earlier acquired frame with the acquired new frame if any registration alignment is determined to exist therebetween, and repeating the acquiring, comparing, and augmenting until the composite biometric has been generated. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for generating a composite biometric image from a plurality of acquired frames, the method comprising:
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using a finger biometric sensor to acquire a new frame of a portion of a finger biometric; and using a processor for comparing the acquired new frame with at least one earlier acquired frame by performing normalized cross-correlation to determine if any registration alignment exists therebetween, augmenting the at least one earlier acquired frame with the acquired new frame if any registration alignment is determined to exist therebetween, and repeating the acquiring, comparing, and augmenting until the composite biometric has been generated. - View Dependent Claims (8, 9, 10)
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11. A biometric device for generating a composite biometric image from a plurality of acquired frames, the biometric device comprising:
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a sensor to acquire a new frame of a portion of a biometric; and a processor cooperating with said sensor for comparing the acquired new frame with at least one earlier acquired frame by performing normalized cross-correlation to determine if any registration alignment exists therebetween, augmenting the at least one earlier acquired frame with the acquired new frame if any registration alignment is determined to exist therebetween, and repeating the acquiring, comparing, and augmenting until the composite biometric has been generated. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification