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Real time video perspective digital map display

  • US 4,489,389 A
  • Filed: 10/02/1981
  • Issued: 12/18/1984
  • Est. Priority Date: 10/02/1981
  • Status: Expired due to Term
First Claim
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1. A digital information storage and read-out system for use in a system producing a perspective display, comprising:

  • memory means for storing digital data representing a two-dimensional pattern of elevation information in addressable memory locations;

    means for generating signals representing the parameters of the desired perspective display including the height and location of the viewing point and the angle of the display with respect to the two-dimensional patterns;

    read-out control means for reading elevation data out of said memory means from selected addressable memory locations through generation of address signals and application of said address signals to said memory means; and

    perspective transform means, responsive to said signal generating means, for transforming the address of each elevation data read out of said memory means from the address of that point in the two-dimensional pattern to the address of a respective pixel position in the perspective display.

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