The effects of raster structure suppression on visual thresholds, target acquisition performance, and image quality
Beamon, William S
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Television systems have been used for about four decades in a wide variety of commercial, scientific, and military settings. While the basic principles of television operation have not changed, there have been many improvements in video system technology in recent years. Research by physicists, electrical engineers, and computer specialists has resulted in improved sensors, better transmission techniques, and new types of projection and flat panel displays. As a result of improved sensor devices, video systems have been used to convert scene irradiance information, well beyond the spectral sensitivity of the eye, to a more useful visible form. Two examples are (1) forward looking infrared (FLIR) systems, which utilize a natural "window" in the atmospheric absorption spectrum, and (2) low light level television (LLLTV) systems, which glean useful information from scenes illuminated only by starlight. Other devices, such as scanning electron microscopes and side-looking airborne radar (SLAR), convert other forms of electromagnetic energy to visible images by means of a television display. As technology has advanced, new uses for video systems and cathode ray tube (CRT) television displays have been developed.
- Doctoral Dissertations