This paper studies the transfer of information in pixelated display systems when there is a resolution mismatch between the input sensor video and the sampled displays, with the display having lower resolution (display in terms of number of pixel elements) than the input video. This scenario is increasingly likely to occur in military aircraft where the design and upgrade cycles of the sensors do not necessarily track the corresponding cycles for the displays. The major question discussed here is whether information that is critical to the successful operation of the aircraft can be preserved. In past work, the authors have derived the modulation transfer function for sampled-data displays and applied it to study the image quality and resolution of AMLCD cockpit displays. This analysis, like traditional MTF analysis for CRT systems, focused on the sine-wave modulation of the system. Such analysis shows the loss of information in the form of the sinusoidal components between the display and sensor Nyquist limits. In this paper, we show that even in such cases, the information of most interest to military users, namely the presence of single pixel point targets or single-pixel wide line targets, can be significantly preserved with the use of appropriate digital filtering.
Information transfer between unmatched sensors and sampled displays
1997
12 Seiten, 8 Quellen
Aufsatz (Konferenz)
Englisch
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