Next-Generation Flight Simulators: Image-Update-Rate Considerations
Final rept. Jan 2002-Jan 2003
LOCKHEED MARTIN TECHNOLOGY SERVICES MESA AZ
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The level of detail in flight-simulator images depends upon the resolutions of the database, the image generator IG, and the display. In response to the need for greater detail, resources are being devoted to increasing the spatial resolution of each of these system components. Next-generation flight-simulator visual systems will thus be capable of representing smaller environmental features and of representing a given feature at a greater distance. However, flight-simulator imagery is more than a sequence of static, spatial images. The visual system of a simulator creates three-dimensional space-time images, and the quality of these images depends on the temporal as well as the spatial characteristics of both the IG and the display. Here we discuss how the spatial resolutions of the database and the IG affect the temporal frequencies in an image and thus the extent of temporal aliasing likely with a standard, 60-Hz image-update rate. We also discuss how the spatial and temporal resolutions of a display system limit the spatiotemporal-frequency spectrum of the display image. We conclude with a brief description of some perceptual effects of temporal aliasing.
- Military Aircraft Operations