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Search Publications by: John M. Libert (Assoc)

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Displaying 51 - 75 of 93

Effects of JPEG 2000 Image Compression on 1000ppi Fingerprint Imagery

May 26, 2011
Author(s)
Shahram Orandi, John M. Libert, John Grantham, Kenneth Ko, Stephen S. Wood, Jin Chu Wu
This paper presents the findings of a study conducted to measure the impact of JPEG 2000 compression on fingerprint imagery at various levels of compression. The impact of compression is measured in terms of impact to both Galton and non-Galton based

A 1D Spectral Image Validation/Verification Metric for Fingerprints

August 19, 2009
Author(s)
John M. Libert, John D. Grantham, Shahram Orandi
Image validation and verification are important functions in the acquisition of fingerprint images from live-scan devices and for assessing and maintaining the fidelity of fingerprint image databases. In addition to law enforcement, such databases are used

Assessing Face Acquisition

September 15, 2008
Author(s)
Mary F. Theofanos, Brian C. Stanton, Charles L. Sheppard, Ross J. Micheals, John M. Libert, Shahram Orandi
The requirements necessary for taking a successful face picture are arguably the least constrained of any biometric. The camera must be operational, and the subject must be illuminated sufficiently and facing the camera. Yet, a significant portion of the

Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques

January 1, 2006
Author(s)
Jun-Feng Song, Theodore V. Vorburger, Thomas Brian Renegar, Hyug-Gyo Rhee, A Zheng, L Ma, John M. Libert, Susan M. Ballou, B Bachrach, K Bogart
Three optical instruments including an interferometric microscope, a Nipkow disk confocal microscope and a laser scanning confocal microscope are used for the measurements of bullet profile signatures of a NIST (National Institute of Standards and

Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques

January 1, 2006
Author(s)
Jun-Feng Song, Theodore V. Vorburger, Thomas Brian Renegar, Xiaoyu Alan Zheng, Hyug-Gyo Rhee, John M. Libert, Li Ma, K Bogart, Susan M. Ballou, B Bachrach
Three optical instruments including an interferometric microscope, a Nipkow disk confocal microscope and a laser scanning confocal microscope are used for the measurements of bullet profile signatures of a National Institute of Standards and Technology

Current Projects in Display Metrology at the NIST Flat Panel Display Laboratory

February 1, 2003
Author(s)
Paul A. Boynton, Edward F. Kelley, John M. Libert
The NIST Flat Panel Display Laboratory (FPDL) is operated through the Display Metrology Project (DMP) of the Electronic Information Technology Group in the Electricity Division of the Electronics and Electrical Engineering Laboratory of NIST. The DMP works

An Assessment Standard for the Evaluation of Display Measurement Capabilities

November 1, 2000
Author(s)
John M. Libert, Paul A. Boynton, Edward F. Kelley, Steven W. Brown, Yoshi Ohno
A prototype display measurement assessment transfer standard (DMATS) is being developed by NIST to assist the display industry in standardizing measurement methods used to quantify the performance of electronic displays. Designed as an idealized electronic

Meeting the Metrology Needs of the Microdisplay Industry

August 31, 2000
Author(s)
Paul A. Boynton, Edward F. Kelley, John M. Libert
Measuring the optical characteristics of microdisplays produce challenges to traditional display metrology. When using light-measuring devices to measure scenes having high contrasts or wide color variations, they suffer the effects of veiling glare or

Mosquito Noise in MPEG-compressed Video: Test Patterns and Metrics

June 24, 2000
Author(s)
Charles D. Fenimore, John M. Libert, Peter Roitman
Mosquito noise is a time dependent video compression impairment in which the high frequency spatial detail in video images having crisp edges is aliased intermittently. A new synthetic test pattern of moving spirals or circles is described which generates
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