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Proceedings Paper

Method of anti-blooming in measurement of low-light-level television
Author(s): Jiali Zhu; Xiaodong Liu; Ping Zhang; Fang Hao; Shiming Zhang
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Paper Abstract

Blooming is a normal phenomenon in the measurement of low light level television (LLL TV) due to its inner auto-gain control, which will influence the test result and should be controlled in the measurement process. Analyzing the blooming principle, a solving method was improved by increasing the ambient illumination on the sense of LLL TV, which will decrease the auto-gain value of LLL TV. What’s more, this method was validated in an experiment of resolution measurement of LLL TV by the applying an auxiliary lighting equipment. The auxiliary light equipment was composed with three ground glasses, twelve LED lamps, and a box brushed with diffuse materials inside. The color temperature of LED lamps was 3000K whose value is close to the light source (2856K) of resolution measurement. During the experiment, auxiliary light equipment was placed in front of the LLL TV. By analyzing the output image of the LLL TV, the blooming phenomenon disappeared and the covered resolution image appeared. The result means that the method of increasing the ambient illumination on the sense of LLL TV is an effective way to depress the blooming in measurement of LLL TV, and it can be used to other parameter measurement of LLL TV.

Paper Details

Date Published: 16 August 2013
PDF: 6 pages
Proc. SPIE 8912, International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications, 89120D (16 August 2013); doi: 10.1117/12.2032756
Show Author Affiliations
Jiali Zhu, Jiangsu North Hogon Co. Ltd. (China)
Xiaodong Liu, Jiangsu North Hogon Co. Ltd. (China)
Ping Zhang, Jiangsu North Hogon Co. Ltd. (China)
Fang Hao, Jiangsu North Hogon Co. Ltd. (China)
Shiming Zhang, Jiangsu North Hogon Co. Ltd. (China)


Published in SPIE Proceedings Vol. 8912:
International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications
Benkang Chang; Hui Guo, Editor(s)

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