Accession Number : ADA113136

Title :   Computer Program for Analysis of Spherical Screen Distortion.

Descriptive Note : Technical rept. Oct 80-Feb 81,


Personal Author(s) : Hebb,Richard C

PDF Url : ADA113136

Report Date : Mar 1982

Pagination or Media Count : 71

Abstract : In visual simulation, the distortion of imagery in wide-angle display systems is a major concern. Effective flight training requires that the imagery presented to a trainee provide a proper perspective view of his simulated environment without distortion. Use of spherical screens (domes) introduces perspective and geometrical distortion into these wide-angle displays. Use of video projection systems with Computer Image Generation (CIG) offers the options of raster shaping or computer remapping for distortion correction. The method is to correct the imagery before projection in order to provide a non-distorted scene to a trainee. This report is documentation of a computer program for analysis of the required raster correction for specific projector/viewpoint positioning within a spherical screen. The programs and report were initiated to provide input to the F-18 simulator (Device 2E7) being developed by Hughes Aircraft. (Author)

Descriptors :   *Flight simulation, *Distortion, *Screens(Displays), *Computer program documentation, *Flight training, Computer graphics, Wide angles, Visibility, FORTRAN, Trainees, Video signals, Projective techniques, Computer applications, Video mapping, Corrections, Rasters, Position finding, Shape, Sizes(Dimensions), Image intensification, Data bases

Subject Categories : Flight Control and Instrumentation
      Humanities and History
      Test Facilities, Equipment and Methods
      Printing and Graphic Arts

Distribution Statement : APPROVED FOR PUBLIC RELEASE