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Rudolf Maarten Bolle, Sharon Louise Nunes, Sharathchandra Pankanti, Nalini Kanta Ratha, Barton Allen Smith, Thomas Guthrie Zimmerman: Method for biometric-based authentication in wireless communication for access control. International Business Machines Corporation, Randy W Lacasse, Ramraj Soundararajan, Lacasse & Associates, November 16, 2004: US06819219 (341 worldwide citation)

Smart cards systems that are utilized in biometric authentication are slow in processing and have the cards themselves have the added disadvantage of being misplaced or lost. Moreover, storing biometric data (on a database) over a network poses security issues that in extreme instances can be compro ...


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Rudolf Maarten Bolle, Jonathan Hudson Connell, Nalini Kanta Ratha: System and method for data hiding in compressed fingerprint images. International Business Machines Corporation, Louis J Percello, October 9, 2001: US06301368 (55 worldwide citation)

A method to hide small messages in a wavelet compressed fingerprint image is presented. The method is characterized by random placement of the message bits in the compressed and quantized indices. The compressed image can be decompressed by any certified decompressor without any visible difference. ...


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Rudolf Maarten Bolle, Robert Steven Germain, Richard Lawrence Garwin, James Lewis Levine, Sharathchandra Umpathirao Pankanti, Nalini Kanta Ratha, Michael Alan Schappert: System and method for distortion control in live-scan inkless fingerprint images. International Business Machines Corporation, Louis J F Chau & Associates Percello, May 16, 2000: US06064753 (47 worldwide citation)

A computer system and method determines the force and/or torque applied during the image acquisition stage of a biometric characteristic. Images with very high or very low pressure or high shear torque are rejected and user/operator is notified to re-acquire the image. Alternatively, the application ...


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Rudolf Maarten Bolle, Jonathan Hudson Connell, Nalini Kanta Ratha: System and method for generating a rolled surface representation from a set of partial images. International Business Machines, Louis J Percello, Charles W Peterson Jr, July 22, 2003: US06597802 (23 worldwide citation)

The invention is a system and method for constructing a rolled surface image from a set of partial surface images. A sequence of individual partial surface images is acquired as an object is progressively rolled across the surface of an imaging device. The imaging device is configured so that only t ...


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Jonathan Hudson Connell, Nalini Kanta Ratha: Methods and apparatus for generation of cancelable face template. International Business Machines Corporation, Eustus D Nelson, Ryan Mason & Lewis, September 10, 2013: US08532344 (12 worldwide citation)

Techniques for generating a distorted template for a given facial image are provided. First, at least one facial feature point from a given facial image is selected. The selected facial feature has location information associated therewith. A representation of a region proximate to the selected faci ...


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Gaurav Aggarwal, Rudolf Maarten Bolle, Tsai Yang Jea, Nalini Kanta Ratha: Fingerprint representation using gradient histograms. International Business Machines Corporation, Preston J Young, Ryan Mason & Lewis, January 7, 2014: US08625861 (4 worldwide citation)

Techniques for generating a gradient characterization for a first fingerprint image are provided. One or more fingerprint feature points are selected from the first fingerprint image. A region is obtained for each of the one or more selected fingerprint feature points. The region is a representation ...


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Rudolf Maarten Bolle, Sharat Suresh Chikkerur, Sharathchandra UmapathiRao Pankanti, Nalini Kanta Ratha: Fingerprint representation using localized texture feature. International Business Machines Corporation, Tutunjian & Bitetto P C, Preston J Young Esq, May 15, 2012: US08180121 (1 worldwide citation)

A system and method for processing fingerprints includes representing each minutiae in a fingerprint by determining quantized Gabor coefficients to represent texture content of the minutiae. A distance is computed between represented minutiae and stored minutiae. The minutiae matches are ranked base ...


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Rudolf Maarten Bolle, Sharat S Chikkerur, Jonathan Hudson Connell, Nalini Kanta Ratha: Methods and apparatus for generation of cancelable fingerprint template. International Business Machines Corporation, Eustus D Nelson, Ryan Mason & Lewis, September 17, 2013: US08538096

Techniques for generating a distorted fingerprint representation for a given fingerprint image are provided. First, at least one fingerprint feature point from a given fingerprint image is selected. At least one representation of a region proximate to the selected fingerprint feature point is then g ...


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Gaurav Aggarwal, Rudolf Maarten Bolle, Jonathan H Connell, Nalini Kanta Ratha: Method and apparatus for repeatable facial distortion. International Business Machines Corporation, Preston J Young Esq, May 28, 2013: US08452058

In one embodiment, the invention is a method and apparatus for repeatable facial distortion. One embodiment of a method for generating a secure facial image from an original facial image includes receiving the original facial image and a key, the key being associated with a subject depicted in the o ...


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