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You searched on: Author: jun-feng song

Displaying records 21 to 30 of 130 records.
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21. Striation Density for Predicting the Identifiability of Fired Bullets
Published: 9/1/2010
Authors: Wei Chu, Jun-Feng Song, Theodore Vincent Vorburger, Susan M Ballou
Abstract: Without a selection procedure to exclude the bullets having insufficient individualized ballistics signature, automated ballistics identification systems will correlate an evidence bullet with all reference bullets stored in the database. Correlation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901713

22. 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

23. 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

24. 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

25. 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

26. 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

27. 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

28. 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

29. 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

30. 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



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