Real time video perspective digital map display
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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Abstract
A digital system for producing a real-time visual display in perspective of the terrain over which an aircraft is passing on the basis of compressed digital data stored on a cassette tape includes a perspective processor for transforming the addresses of points in a two-dimensional data pattern to the addresses these points occupy in a three-dimensional scene and for filling in points between the transformed points to provide a complete display of the terrain in perspective.
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Citations
42 Claims
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1. A digital information storage and read-out system for use in a system producing a perspective display, comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. A digital information storage and read-out system for use in generating a perspective display of terrain over which a vehicle is moving on the basis of digital data representing a two-dimensional elevation terrain pattern which is addressable in relation to the coordinate position of each point in said terrain pattern, comprising:
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a scene memory for storing said elevation data representing at least a portion of the terrain pattern of the terrain over which the vehicle is passing; signal supplying means for providing signals representing the angle of heading of said vehicle with respect to a fixed geographical orientation, the angle of the perspective display with respect to said two-dimensional elevation terrain pattern, and the elevation and current position of said vehicle with respect to said terrain; read-out control means responsive to the signals from said signal supplying means for reading elevation data out of said scene memory through generation of address signals and the application of said address signals to said scene memory; and perspective transform means responsive to the signals from said signal supplying means for transforming the address of each point read out of said scene memory from the address of the point in the two-dimensional terrain pattern to the address of a respective pixel position in said perspective display. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A system for generating a perspective display of terrain over which a vehicle is moving, comprising:
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a scene memory for storing digital data representing a two-dimensional elevation terrain pattern which is addressable in relation to the coordinate position of each elevation point with respect to a selected geographical orientation, signal supplying means for providing signals representing the heading angle of said vehicle with respect to said selected geographical orientation, the angle of the desired perspective display with respect to said two-dimensional elevation terrain pattern, and the elevation and current position of said vehicle with respect to said terrain; read-out control means, responsive to the signals from said signal supplying means, for reading elevation data for respective ones of said elevation points out of said scene memory through generation of address signals and the application of said address signals to said scene memory; perspective transform means responsive to the signals from said signal supplying means for transforming the address of each point read out of said scene memory from the address of that point in the scene memory to the address of a respective pixel position in said perspective display; display memory means for storing the elevation data read out of said scene memory in a matrix of memory positions forming storage locations corresponding to said transformed addresses; and display means for displaying the elevation data stored in said display memory means to produce said perspective display. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A digital information storage and read-out system for use in generating a real-time perspective display of terrain over which a vehicle is moving on the basis of stored digital data representing a two-dimensional elevational terrain pattern and signals indicating the instantaneous heading, geographic location and elevation of the vehicle and the desired angle of view of the resultant perspective display, comprising
a scene memory for storing said digital data in addressable coordinate positions relating to a selected geographic orientation of the terrain; -
read-out control means responsive to said signals representing heading, geographic location and angle of view for reading data out of said scene memory through generation of address signals to address a selected area of said scene memory on the basis of the heading and geographic location of the vehicle and the desired angle of view with respect to the terrain represented by said digital data; perspective transform means responsive to the signals representing heading, elevation, geographic location and angle of view for transforming the address of each data value read out of said scene memory from the address of its associated point in the two-dimensional terrain pattern to the address of a respective pixel in said perspective display; and display means responsive to the addresses generated by said perspective transform means for generating a real-time perspective display of said terrain. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification