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You searched on: Author: geraldine cheok

Displaying records 21 to 30 of 84 records.
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21. Proceedings of the GSA 3D Imaging Workshop, February 28, 2011 (NIST TN 1699)
Series: Technical Note (NIST TN)
Report Number: 1699
Published: 12/9/2009
Authors: Geraldine S Cheok, Marek Franaszek, Kamel S Saidi
Abstract: The General Services Administration (GSA) has been involved in 3D imaging since the early 2000s. Since 3D imaging was a relatively new technology at that time, GSA needed to develop and provide initial guidance to their project managers (PMs) on 3D i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908607

22. Evaluation of an Acceptance Sampling Method for 2D/3D Building Plans Derived from 3D Imaging Data
Published: 12/1/2009
Authors: Geraldine S Cheok, Marek Franaszek, James J Filliben
Abstract: An acceptance sampling method, based on obtaining physical measurements, for accepting 2D building plans generated from 3D imaging data is evaluated and demonstrated using an actual GSA (General Services Administration) facility. The objective of th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907878

23. Fitting Spheres to Range Data from 3D Imaging Systems
Published: 10/1/2009
Authors: Marek Franaszek, Geraldine S Cheok, Kamel S Saidi, Christoph Johann Witzgall
Abstract: Two error functions used for nonlinear Least Squares (LS) fitting of spheres to range data from 3D imaging systems are discussed: orthogonal error function and directional error function. Both of the functions allow unrestricted gradient-based minimi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861541

24. Gauging the Repeatability of 3D Imaging Systems by Sphere Fitting
Published: 9/30/2009
Authors: Marek Franaszek, Geraldine S Cheok, Kamel S Saidi
Abstract: Multiple scans of the same object acquired with 3D imaging system (e.g., laser scanner) in the same experimental conditions could provide valuable information about the instrument s performance (e.g., stability, existence of bias, measurement error). ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903444

25. Guidelines for Accepting 2D Building Plans (NIST IR 7638)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7638
Published: 9/30/2009
Authors: Geraldine S Cheok, James J Filliben, Alan M. (Alan M.) Lytle
Abstract: The General Services Administration's (GSA) Public Buildings Services manages 1600 buildings totaling 180, 000, 000 square feet. GSA‰s ability to capture, validate, and report the spatial information of its building assets (e.g., dimensions, areas, a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903918

26. Target Penetration of Laser-Based 3D Imaging Systems
Published: 1/19/2009
Authors: Geraldine S Cheok, Kamel S Saidi, Marek Franaszek
Abstract: The ASTM E57.02 Test Methods Subcommittee is developing a test method to evaluate the ranging performance of a 3D imaging system. The test method will involve either measuring the distance between two targets or between an instrument and a target. Th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909346

27. Guidelines for Accepting 2D Building Plans
Series: OTHER
Published: 12/10/2008
Author: Geraldine S Cheok
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901054

28. Proceedings of IS&T/SPIE 21st Annual Symposium on Electronic Imaging 2009 - 3D Imaging Metrology Conference
Published: 11/5/2008
Authors: Geraldine S Cheok, Kamel S Saidi, Marek Franaszek
Abstract: The ASTM E57.02 Test Methods Subcommittee is developing a test method to evaluate the ranging performance of a 3D imaging system. The test method will involve either measuring the distance between two targets or between an instrument and a target. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900883

29. ASTM E57 - 3D Imaging Systems
Published: 6/4/2008
Authors: Geraldine S Cheok, Alan M. (Alan M.) Lytle, Kamel S Saidi
Abstract: As the applications for 3D imaging systems continue to grow, the need for standards to evaluate these systems has become more critical. The ASTM E57 3D Imaging committee established in 2006 was formed specifically to develop standard terminology ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861567

30. ASTM E-57 3D Imaging Systems Committee: An Update
Published: 3/19/2008
Authors: Alan M. (Alan M.) Lytle, Geraldine S Cheok, Kamel S Saidi
Abstract: In 2006, ASTM committee E57 was established to develop standards for the performance evaluation of 3D imaging systems. The committee's initial focus is on standards for 3D imaging systems typically used for applications including, but not limited t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860707



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