&lt;title&gt;NIST virtual/physical random-profile roughness calibration standards&lt;/title&gt;

Song, Jun-Feng; Evans, Christopher J.; McGlauflin, Michael L.; Whitenton, Eric P.; Vorburger, Theodore V.; Yuan, Yajuan

doi:10.1117/12.328457

Cited by 9 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the reference standard can be an SI unit, a certified reference material (CRM) [14]-such as the NIST standard reference materials (SRM) [15,16], or a standardized measurement procedure error rate [10] (or likelihood ratio LR [11]) when the CMC result (or LR) is higher than a threshold, or it may be concluded as an elimination with a stated false-negative error rate [10] (or LR [11])…”

Section: Development and Application Of The Cmc Algorithmsmentioning

confidence: 99%

“…The instrument is the unknown factor to be verified, calibrated for traceable measurements. According to the VIM/BIPM [14], the reference standard can be an SI unit, a certified reference material (CRM) [14]—such as the NIST standard reference materials (SRM) [15,16], or a standardized measurement procedure [14]. Measurement: The calibrated instrument is then used for measuring the measurand with metrological traceability [14] through the established reference standard to the SI unit.…”

Section: Evaluation Criteria Standard and Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Virtual image standard (VIS) for performance evaluation of the congruent matching cells (CMC) algorithms in firearm evidence identifications

Song

2022

Journal of Forensic Sciences

View full text Add to dashboard Cite

The congruent matching cells (CMC) method was invented at the National Institute of Standards and Technology (NIST) in 2012 for automatic and objective firearm evidence identifications and estimation of the weight of evidence in firearm evidence identifications. Since 2013, five CMC algorithms have been developed at NIST. In this paper, the virtual image standard (VIS) is proposed through trimming and stitching KNM images for quantitative performance evaluations of different CMC algorithms.The evaluation criteria include the correlation accuracy (both the CMC numbers and distribution pattern), correlation efficiency, false positive (FP) error rate, and the maximum separation of known matching (KM) and known non-matching (KNM) image pairs. The VIS composes correlation cells from different KNM images, which can provide a ground truth for verifying the CMC numbers, distribution patterns, and FP errors. By identifying three groups of VIS, the Convergence CMC algorithm showed superior performances for the future casework in firearm evidence identifications.Lastly, the success of this study suggests that the VIS could also be used to optimize the correlation parameters, to develop and test new CMC algorithms, and evaluate the performance before it is put into use for firearm examiner's casework.

show abstract

Section: Development and Application Of The Cmc Algorithmsmentioning

confidence: 99%

Section: Evaluation Criteria Standard and Proceduresmentioning

confidence: 99%

Virtual image standard (VIS) for performance evaluation of the congruent matching cells (CMC) algorithms in firearm evidence identifications

Song

2022

Journal of Forensic Sciences

View full text Add to dashboard Cite

show abstract

“…In 1965, Häsing and his team developed random profile roughness specimens with Ra range from 0.15 to 1.5 µm at the Physikalisch-Technische Bundesanstalt (PTB, the German national metrology institute) (Braunschweig, Germany). Since then, the specimens developed at PTB have been widely used in the European calibration network and other researchers, like Song and Krüger, have designed other profiles that are currently gathered under Type D of ISO 5436 [18,19]. Another important national metrology institute, the National Physical Laboratory (NPL) (Teddington, UK) in the UK produces certain types of standard also focused on the traceability and the maintenance of the traceability chain [2,20].…”

Section: Commercial Surface Standardsmentioning

confidence: 99%

Design of Industrial Standards for the Calibration of Optical Microscopes

et al. 2020

View full text Add to dashboard Cite

One of the most important fields of study in material science is surface characterization. This topic is currently a field of growing interest as many functional properties depend on the surface texture. In this paper the authors, after a short a review of different methods for surface topography characterization and the determination of the traceability problems that arise in this type of measurements, propose four different designs of material standards that can be used to calibrate the most common optical measuring instruments used for these tasks, such as measuring microscopes, metallurgical microscopes, confocal microscopes, focus variation microscopes, etc. The authors consider that the use of this type of standards (or others similar to them) could provide a step forward in assuring metrological traceability for different metrological characteristics that enables a more precise measurement of surface features with optical measuring instruments. In addition, authors expect that this work could lay the groundwork for the development of custom standards with specialized features tuned to gain a better metrological control when measuring specific geometrical surface properties.

show abstract

Section: A Virtual/physical Bullet Profile Signature Standardmentioning

confidence: 99%

“…The Precision Engineering Division at NIST has a long history of developing surface roughness specimens [ 6 – 9 ]. In 1998, a virtual/physical random profile surface roughness standard was developed at NIST using a numerically controlled (NC) diamond turning process [ 9 ]. Based on the same NC diamond turning technique for manufacturing random profile roughness specimens, two prototype standard bullets were developed in April 1998 [ 10 , 11 ].…”

Section: A Virtual/physical Bullet Profile Signature Standardmentioning

confidence: 99%

SRM 2460/2461 standard bullets and casings project

Song¹,

Whitenton²,

Kelley³

et al. 2004

J. Res. Natl. Inst. Stand. Technol.

Self Cite

View full text Add to dashboard Cite

The National Institute of Standards and Technology Standard Reference Material (SRM) 2460/2461 standard bullets and casings project will provide support to firearms examiners and to the National Integrated Ballistics Information Network (NIBIN) in the United States. The SRM bullet is designed as both a virtual and a physical bullet profile signature standard. The virtual standard is a set of six digitized bullet profile signatures originally traced from six master bullets fired at the Bureau of Alcohol, Tobacco and Firearms (ATF) and the Federal Bureau of Investigation (FBI). By using the virtual signature standard to control the tool path on a numerically controlled diamond turning machine, 40 SRM bullets were produced. A profile signature measurement system was established for the SRM bullets. The profile signature differences are quantified by the maximum of the cross correlation function and by the signature difference between pairs of compared profile signatures measured on different SRM bullets. Initial measurement results showed high reproducibility for both the measurement system and production process of the SRM bullets. A traceability scheme has been proposed to establish the measurement traceability for nationwide bullet signature measurements to NIST, ATF and FBI. Prototype SRM casings have also been developed.

show abstract

<title>NIST virtual/physical random-profile roughness calibration standards</title>

Cited by 9 publications

References 1 publication

Virtual image standard (VIS) for performance evaluation of the congruent matching cells (CMC) algorithms in firearm evidence identifications

Virtual image standard (VIS) for performance evaluation of the congruent matching cells (CMC) algorithms in firearm evidence identifications

Design of Industrial Standards for the Calibration of Optical Microscopes

SRM 2460/2461 standard bullets and casings project

Contact Info

Product

Resources

About