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Search Publications by: Patrick J. Grother (Fed)

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Displaying 76 - 100 of 100

Transformation, Ranking, and Clustering for Face Recognition Algorithm Performance

January 1, 2002
Author(s)
Stefan D. Leigh, Nathanael A. Heckert, Andrew L. Rukhin, P J. Phillips, Patrick J. Grother, E M. Newton, M Moody, K Kniskern, S Heath
The performance of face recognition algorithms is recently of increased interest, although to date empirical analyses of algorithms have been limited to rank-based scores such a cumulative match score and receiver operating characteristic. This paper

Optical Path Difference Measurement Techniques for SLMs

March 1, 2001
Author(s)
Patrick J. Grother, D P. Casasent
A simple measurement method to obtain 2-D spatial point-by-point optical path difference (OPD) data for spatial light modulators (SLMs) is described. A simple imaging system is used that allows measurements of all SLM parameters on the same laboratory

Distortion-Tolerant Filter for Elastic-Distorted Fingerprint Matching

March 1, 2000
Author(s)
Craig I. Watson, Patrick J. Grother, D P. Casasent
This paper gives results for using distortion tolerant filters to improve performance of fingerprint correlation matching. Three types of distortion tolerant filters were tested: summation, weighted, and MINACE. A set of 55 fingers were used from NIST

Performance of Electrically Addressed Spatial Light Modulators

March 3, 1999
Author(s)
Patrick Grother, M L. Hsieh, Craig I. Watson
We address two important performance limitations of commonly available spatial light modulations. First we present a method for the determination of modulation transfer function and amplitude modulation from CCD captures of imaged gratings. Second, we

Composite Filter for VanderLugt Correlator

February 4, 1999
Author(s)
Craig I. Watson, Charles L. Wilson, E G. Paek, Patrick J. Grother
This paper will examines the use of composite filters for improving the effectiveness of a Vanderlugt correlator when used for fingerprint identification. A digital simulation, which accounts for noise sources in the optical setup, is used to design and
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