Patent
1993-04-12
1996-02-27
Zimmerman, Mark K.
395126, 395127, 395134, 395152, G06T 1510, G06T 1550, G06T 1570
Patent
active
054955629
ABSTRACT:
A computer-based thermal scene simulation system and method for generating synthetic images to facilitate the design and test of missile-borne electro-optical seeker systems. A scene is comprised of objects and a background selected from available target and background database files. Stationary or mobile objects are modeled by combining small planar facets to cover their three dimensional surface. Each facet is associated in the database files with the thermal and optical properties of the surface that is modeled. The background is modeled on the interior surface of a pyramid defining the extent of the scene, with the floor of the pyramid representing the surface of the earth and the sides of the pyramid representing an above horizon image. The pyramid surface is then divided into triangular facets that represent portions of the surface. Each facet is assigned a uniform texture selected from the background database files comprising background materials. The simulation is designed to be used with missile six degree of freedom simulations, and generates images as seen by a missile seeker based on instantaneous seeker line of sight, seeker position, seeker orientation, object orientations and positions, and background. Seeker-to-object aspect angles and range closure rates are processed by an image generation procedure. A projected image is then convolved with the optical point spread function of the seeker to generate a radiance distribution on the focal plane of the seeker. Sampling of the focal plane radiance distribution is modeled and an output data stream from the seeker to a signal processor is generated.
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Denney Dwight L.
Yin Yung K.
Brown Charles D.
Denson-Low Wanda K.
Heald Randall M.
Hughes Missile Systems Company
Zimmerman Mark K.
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