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You searched on: Author: jun-feng song

Displaying records 21 to 30 of 129 records.
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21. Topography measurements for correlations of standard cartridge cases
Published: 7/1/2010
Authors: Theodore Vincent Vorburger, Jun-Feng Song, Wei Chu, Thomas B Renegar, Xiaoyu A Zheng, James H Yen, Robert Meryln Thompson, Richard M Silver, Benjamin Bachrach, Martin Ols
Abstract: NIST Standard Reference Materials (SRM) 2460 Standard Bullets and 2461 Standard Cartridge Cases are intended for use as check standards for crime laboratories to help verify that their computerized optical imaging equipment for ballistics image acqui ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905846

22. Optimal Compression and Binarization of Signature Profiles for Automated Bullet Identification Systems
Published: 5/1/2010
Authors: Wei Chu, Jun-Feng Song, Theodore Vincent Vorburger, Robert Meryln Thompson, Thomas B Renegar, Richard M Silver
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905570

23. Applications of Cross-Correlation Functions
Published: 4/14/2010
Authors: Theodore Vincent Vorburger, Jun-Feng Song, Wei Chu, Li Ma, Xiaoyu A Zheng, Thomas B Renegar, Son H Bui
Abstract: We describe several examples where we use cross-correlation functions to quantify the similarity of 2D surface profiles or of 3D surface topography images. The applications have included 1) the manufacture of Standard Reference Material (SRM) bullet ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902481

24. Pilot Study of Automated Bullet Signature Identification Based on Topography Measurements and Correlations
Published: 3/1/2010
Authors: Wei Chu, Jun-Feng Song, Theodore Vincent Vorburger, James H Yen, Susan M Ballou, Benjamin Bachrach
Abstract: A procedure for automated bullet signature identification is described based on topography measurements using confocal microscope and correlations calculation. Automated search and retrieval systems are widely used for comparison of firearms evidence ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824708

25. Three steps towards metrological traceability for ballistics signature measurements
Published: 2/1/2010
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Robert Meryln Thompson, Thomas B Renegar, Xiaoyu A Zheng, Li Ma, James H Yen, Martin Ols
Abstract: The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 bullets and 2461 casings. NIST and ATF are propos ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901492

26. An Iterative Image Registration Algorithm by Optimizing Similarity Measurement
Published: 1/1/2010
Authors: Wei Chu, Li Ma, Jun-Feng Song, Theodore Vincent Vorburger
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903937

27. Traceability for Ballistics Signature Measurements in Forensic Science
Published: 12/1/2009
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Susan M Ballou, Li Ma, Thomas B Renegar, Xiaoyu A Zheng, Martin Ols
Abstract: The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 Bullets and 2461 Casings. NIST has also developed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824703

28. NIST SRM (Standard Reference Material) 2460/2461 Standard Bullets and Casings Project
Published: 10/13/2009
Authors: Jun-Feng Song, Thomas B Renegar, Xiaoyu A Zheng, Robert Meryln Thompson, Richard M Silver, Martin M Ols, Ted T Vorburger
Abstract: The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 Bullets and 2461 Cartridge Cases. NIST has also d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903625

29. GEOMETRIC MEASUREMENT COMPARISONS FOR ROCKWELL DIAMOND INDENTERS
Published: 9/6/2009
Authors: Jun-Feng Song, Samuel Rea Low III, Xiaoyu A Zheng
Abstract: In the uncertainty budget of Rockwell C hardness (HRC) tests, geometric error of the Rockwell diamond indenter is a major contributor. The geometric calibration of Rockwell diamond indenters has been a key issue for Rockwell hardness standardization ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902704

30. OPTIMIZING GAUSSIAN FILTER LONG WAVELENGTH CUTOFF »c FOR IMPROVING 3D BALLISTICS SIGNATURE CORRELATIONS
Published: 10/19/2008
Authors: Jun-Feng Song, Li Ma, Theodore Vincent Vorburger, Susan M Ballou
Abstract: In the ballistics measurements and correlations, optimum selection of c has particular importance for an unambiguous extraction of Individual Characteristics from the Class Characteristics . Poorly selected c might result in the Class Character ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824686



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