13 May 2016 The glass dome: low-occlusion obstacle symbols for conformal displays
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Contemporary helmet mounted displays integrate high-resolution display units together with precise head-tracking solutions. This combination offers the opportunity to show symbols in a conformal way. Conformality here means that a hazard symbol is linked to the outside scenery. Thus, a pilot intuitively understands the connection between the symbol and its corresponding terrain feature, even if the feature is not fully visible due to degraded visual conditions. To accomplish this purpose the symbol has to be sufficiently noticeable in terms of size and brightness. However, this gives rise to the danger that parts of the outside scenery are occluded by the symbol. Furthermore, symbols should not clutter the display, in order not to distract the pilot. We present a solution framework of highlighting obstacles by symbols that balance low occlusion against noticeability. Our concept allows including different representations for individual classes of obstacles in a unified way. We detail the implementation of the display symbols. Finally, we present results of a first acceptance test with pilots.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Niklas Peinecke, Niklas Peinecke, Alvaro Chignola, Alvaro Chignola, Daniela Schmid, Daniela Schmid, Hartmut Friedl, Hartmut Friedl, "The glass dome: low-occlusion obstacle symbols for conformal displays", Proc. SPIE 9839, Degraded Visual Environments: Enhanced, Synthetic, and External Vision Solutions 2016, 983907 (13 May 2016); doi: 10.1117/12.2223597; https://doi.org/10.1117/12.2223597

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