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Proceedings Paper

LEDs as light source: examining quality of acquired images
Author(s): Rafic Bachnak; Jeng Funtanilla; Jose Hernandez
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Paper Abstract

Recent advances in technology have made light emitting diodes (LEDs) viable in a number of applications, including vehicle stoplights, traffic lights, machine-vision-inspection, illumination, and street signs. This paper presents the results of comparing images taken by a videoscope using two different light sources. One of the sources is the internal metal halide lamp and the other is a LED placed at the tip of the insertion tube. Images acquired using these two light sources were quantitatively compared using their histogram, intensity profile along a line segment, and edge detection. Also, images were qualitatively compared using image registration and transformation. The gray-level histogram, edge detection, image profile and image registration do not offer conclusive results. The LED light source, however, produces good images for visual inspection by an operator. The paper will present the results and discuss the usefulness and shortcomings of various comparison methods.

Paper Details

Date Published: 3 May 2004
PDF: 9 pages
Proc. SPIE 5303, Machine Vision Applications in Industrial Inspection XII, (3 May 2004); doi: 10.1117/12.524935
Show Author Affiliations
Rafic Bachnak, Texas A&M Univ. (United States)
Jeng Funtanilla, Texas A&M Univ. (United States)
Jose Hernandez, NASA Johnson Space Ctr. (United States)

Published in SPIE Proceedings Vol. 5303:
Machine Vision Applications in Industrial Inspection XII
Jeffery R. Price; Fabrice Meriaudeau, Editor(s)

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