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Video Based Metrologly

Published

Author(s)

Theodore D. Doiron, Tsai H. Hong, John R. Stoup, Marilyn N. Abrams

Abstract

Video cameras are increasingly used to make dimensional measurements. Many of these systems use interpolation of the pixel data, with some systems claiming to find edges with precision of 1/100 of a pixel. We have studied the response of single pixels of a CCD camera to a small circle of light. The illuminated area has a diameter of less than 1/3 of a pixel, and the relative response of the pixel to the position of the light was measured. We have found that the active responsive area of the pixel is quite small compared to the total area of the pixel. Some implications of these results on the use of cameras as measurement devices are discussed.
Citation
To be published in the ASTM Standardization News.

Keywords

CCD camera, CCD camera, CCD camera, CCD camera, pixel geometry, pixel geometry, pixel geometry, pixel geometry, pixel sensitivity, pixel sensitivity, pixel sensitivity, pixel sensitivity, systematic errors, systematic errors, systematic errors, systematic errors, video metrology, video metrology, video metrology, video metrology

Citation

Doiron, T. , Hong, T. , Stoup, J. and Abrams, M. (2000), Video Based Metrologly, To be published in the ASTM Standardization News., [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=821728 (Accessed June 22, 2024)

Issues

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Created November 30, 2000, Updated October 12, 2021