| 摘要 |
The invention relates to methods for synthesizing an intervisibility image made up of pixels, representing the distribution of intervisibility zones on an area over which an aircraft flies. The inventive method is used to synthesize an intervisibility image made up of pixels, representing the distribution of indirect intervisibility between the aircraft and at least one potential threat on an area over which said aircraft flies, wherein a plain danger colour is associated with the set of intervisibility zones and a plain security colour which is distinct from the plain danger coloour is associated with the set of portions of zones within the reach of threats which are not covered by an indirect intervisibility zone, and in at least one mode of the synthesis method, said plain colours can be modulated for each pixel by shading information ( alpha omb) representing the relief of the terrain in said pixel. The inventive method can be used in a cartographic accelerator card.
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