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Proceedings Paper

Digital image processing for thermal observation system
Author(s): Wee Kyung Yu; In Seob Song; Eon Suk Yoon; Y. S. Lee; M. G. Moon; Seok-Min Hong; J. K. Kim
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Paper Abstract

This paper describes the digital image processing techniques of a thermal observation system, which is a serial/parallel scan and standard TV display type using a SPRITE (Signal PRocessing In The Element) detector. The designed digital electronics has two major signal processing stages: a high speed digital scan converter and an autoregressive (AR) filter. The digital scan converter is designed with analog-to-digital converter (ADC) and dual port RAM that can carry out reading and writing simultaneously, thus enabling compact scan conversion. The scan converter reformats the five parallel analog signals generated from the detector elements into serial digital signals compatible with RS-170 video rate. For the improvement of signal-to- noise ratio and compensation for the gamma effect of the monitor, we have implemented a real time 1st order AR filter that adopts frame averaging method. With the look-up-table (LUT) ROM that contains the frame averaging factors and the gamma coefficients, this digital filter performs the noise reduction and the gamma correction at the same time. This digital image processor has been proven to provide excellent image quality and superior detection capability for distant targets at night time.

Paper Details

Date Published: 30 May 1995
PDF: 6 pages
Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); doi: 10.1117/12.209655
Show Author Affiliations
Wee Kyung Yu, Agency for Defense Development (South Korea)
In Seob Song, Agency for Defense Development (South Korea)
Eon Suk Yoon, Agency for Defense Development (South Korea)
Y. S. Lee, Agency for Defense Development (South Korea)
M. G. Moon, Agency for Defense Development (South Korea)
Seok-Min Hong, Agency for Defense Development (South Korea)
J. K. Kim, Agency for Defense Development (South Korea)


Published in SPIE Proceedings Vol. 2513:
21st International Congress on: High-Speed Photography and Photonics
Ung Kim; Joon-Sung Chang; Seung-Han Park, Editor(s)

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