SCENOGRAPHIC PROCESS AND PROCESSOR FOR FAST PICTORIAL IMAGE GENERATION

摘要

Imagery data of a scene in the form of data for pixels of a display screen, by the use of a voxel data base. A host simulation system provides data as to the viewer's eye position relative to the display screen, which determines the simulated field of view (FOV) and the voxel data base is organized into a two dimensional grid, for each of a plurality of resolution levels representing ground coordinate positions. The display screen comprises rows and columns of pixels and a plane projected through the eyepoint and a given pixel column intercepts the data base grid in a line which defines a given linear scanning path. In accordance with the invention the voxel data base is effectively scanned along the linear path at a data base resolution proportional to the projected pixel size on the data base and the scanned voxel data is processed into data for successive pixels, the respective boundaries of which are projected onto the data base surface encountered in the linear scan of the data base. Compensation for effects such as elevation (vertical) perspective and roll are performed following the computation of the pixel data.