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You searched on: Author: geraldine cheok Sorted by: date

Displaying records 1 to 10 of 90 records.
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1. Propagation of Error from Registration Parameters to Transformed Data
Series: Journal of Research (NIST JRES)
Published: 6/6/2016
Authors: Mili Shah, Marek Franaszek, Geraldine S Cheok
Abstract: Methods to register two sets of data have existed for quite some time. However, these sets of data are rarely error-free. Consequently, any parameters obtained from a registration method will be affected by the error in the sets of data. Moreover, if ...

2. Guidelines for the Registration of Two Coordinate Frames
Series: Technical Note (NIST TN)
Report Number: 1911
Published: 3/2/2016
Authors: Geraldine S Cheok, Marek Franaszek
Abstract: The purpose of registration is to obtain the transformation matrix between two coordinate frames. Typically, sensors record positional measurements in their own local coordinate frame. When positional data are acquired by two instruments or two datas ...

3. Optimization of Registration Performance Metrics
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 8111
Published: 2/25/2016
Authors: Marek Franaszek, Geraldine S Cheok
Abstract: Perception systems are a very important component of automation and robotics. These systems localize objects in its local coordinate frame and the data has to be available for use in another coordinate frame. This requires that the data be transfor ...

4. Performance Evaluation of Human Detection Systems for Robot Safety
Published: 1/22/2016
Authors: William P Shackleford, Geraldine S Cheok, Tsai Hong Hong, Kamel S Saidi, Michael O Shneier
Abstract: Detecting and tracking people is becoming more important in robotic applications because of the increasing demand for collaborative work in which people interact closely with and in the same workspace as robots. New safety standards allow people to w ...

5. Techniques to Evaluate Laser Scanners for Advanced Manufacturing Applications
Published: 7/23/2015
Authors: Prem K Rachakonda, Balasubramanian Muralikrishnan, Katharine M Shilling, Daniel S Sawyer, Geraldine S Cheok, Kamel S Saidi
Abstract: Laser scanners have become indispensable tools for fast and accurate 3D image acquisition applications such as part inspection, reverse engineering, cultural heritage digitization, surveying, automotive robotic navigation etc. The Dimensional Met ...

6. Navigation Performance Evaluation for Automated Guided Vehicles
Published: 5/12/2015
Authors: Roger V Bostelman, Tsai Hong Hong, Geraldine S Cheok
Abstract: Automatic guided vehicles (AGVs), an industrial form of mobile robot, typically navigate using a central computer commanding AGV movement on predefined paths. Although, how well they follow these paths is less defined in research articles and their ...

7. The Axes of Random Infinitesimal Rotations and the Propagation of Orientation Uncertainty
Published: 5/5/2015
Authors: Marek Franaszek, Mili Shah, Geraldine S Cheok, Kamel S Saidi
Abstract: Perception systems can measure the orientation of a solid 3D object; however, their measurements will contain some uncertainties. In many robotic applications, it is important to propagate the orientation uncertainties of a rigid object onto the unce ...

8. Laser scanner two-face errors on spherical targets
Published: 11/11/2014
Authors: Balasubramanian Muralikrishnan, Katharine M Shilling, Daniel S Sawyer, Prem K Rachakonda, Vincent D Lee, Steven David Phillips, Geraldine S Cheok, Kamel S Saidi
Abstract: Geometric misalignments within the construction of a laser scanner such as offsets, tilts, and eccentricities, result in systematic errors in the measured point coordinates (range and angles). Many of these sources of error are sensitive to two-face ...

9. Obstacle Detection and Avoidance from an Automated Guided Vehicle
Published: 9/18/2014
Authors: Roger V Bostelman, William P Shackleford, Geraldine S Cheok
Abstract: Current automated guided vehicle (AGV) technology typically provides material handling flow along single or dual opposing-flow lanes in manufacturing and distribution facilities. An AGV stops for most any obstacle that may be in its path which then ...

10. Towards a Classification System of Manufacturing Objects for the Evaluation of Perception Systems
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7985
Published: 2/27/2014
Authors: Geraldine S Cheok, Marek Franaszek, Afzal A Godil, Kamel S Saidi, Roger Eastman, Tsai Hong Hong

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