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Author: geraldine cheok
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Displaying records 31 to 40 of 80 records.
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31. Proceedings of the 3rd NIST Workshop on the Performance Evaluation of 3D Imaging Systems, March 2-3, 2006
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7357
Published: 10/1/2006
Author: Geraldine S Cheok
Abstract: Two 3D Imaging Systems Performance Evaluation Workshops have been held at the National Institute of Standards and Technology (NIST) the first in 2003 and the second in 2005. These workshops were conducted in an effort to determine the need for sta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860682

32. Recovering Circles and Spheres from Point Data
Published: 7/1/2006
Authors: Christoph Johann Witzgall, Geraldine S Cheok, Anthony J Kearsley
Abstract: Methods for fitting circles and spheres to point sets are discussed. LADAR (LAser Detection And Ranging) scanners, in particular, are capable of generating "point clouds" containing the x, y, z coordinates of up to several millions of points reflecti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50826

33. Recovering Spheres from 3D Point Data
Published: 4/1/2006
Authors: Christoph Johann Witzgall, Geraldine S Cheok, Anthony J Kearsley
Abstract: The National Institute of Standards and Technology is involved in developing standard protocols for the performance evaluation of 3D imaging systems, which include laser scanners and LADARs (LAser Detection and Ranging). A LADAR is an optical device ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50949

34. Using LADAR to characterize the 3-D shape of aggregates: Preliminary results
Published: 3/1/2006
Authors: Edward Joseph Garboczi, Geraldine S Cheok, William C Stone
Abstract: In previous publications, we have shown how using x-ray computed tomography to obtain the raw 3-D data for the coordinates of the surface, and then converting this raw data into an analytical function for the surface via an expansion in spherical har ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860569

35. Status of the NIST 3D Imaging System Performance Evaluation Facility
Published: 1/1/2006
Authors: Geraldine S Cheok, Alan M. (Alan M.) Lytle, Kamel Shawki Saidi
Abstract: This paper will present the status of the indoor artifact-based Performance Evaluation Facility at the National Institute of Standards and Technology (NIST) for 3D imaging systems. This facility will be used to develop test protocols and performance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860649

36. Construction Object Identification from LADAR Scans: An Experimental Study Using I-Beams
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7286
Published: 12/15/2005
Authors: David E. Gilsinn, Geraldine S Cheok, Christoph Johann Witzgall, Alan M. (Alan M.) Lytle
Abstract: Laser Scanning devices (LADAR for Laser Detection and Ranging) are used in construction projects to capture as-built data. They can rapidly generate large unstructured point clouds. This study describes an experiment in which an I-beam on a concrete ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50817

37. NIST LADAR Performance Evaluation Workshop, 2nd Proceedings. March 15-16, 2005.
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7266
Published: 12/1/2005
Author: Geraldine S Cheok
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101053

38. NIST LADAR Performance Evaluation Workshop, 2nd Proceedings. March 15-16, 2005.
Published: 12/1/2005
Author: Geraldine S Cheok
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101242

39. Proceedings of the 2nd NIST LADAR Performance Evaluation Workshop March 15 - 16, 2005
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7266
Published: 10/1/2005
Author: Geraldine S Cheok
Abstract: In recent years, there has been a rapid growth of LADAR (laser detection and ranging) applications and a growing number of LADARs that are commercially available. As a result, there is a corresponding need to evaluate these instruments. This need p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860635

40. Standards Requirements for LADARs?
Published: 1/1/2005
Authors: Geraldine S Cheok, William C Stone, Alan M. (Alan M.) Lytle
Abstract: This paper presents a discussion of standards requirements for LADAR. Two specific questions are addressed: (1) is there a need for such standards and (2) what types of standards are required? LADAR standards development issues and current standard ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909347



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