Mid-field and far-field irradiance approximation

Details Mid-field and far-field irradiance approximation Mid-field and far-field irradiance approximation

2011-05-31

2011-05-31

Nguyen, Kimbinh T (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S419000, C345S420000, C345S427000

Reexamination Certificate

active

07952582

ABSTRACT:
A computerized method for computing an approximation for irradiance at a point in space from a plurality of distant lights sources includes determining a normal to a surface at a point on the surface being illuminated by the light sources, and determining a direction from the light sources to the point. The method further includes retrieving a function of the normal and the direction wherein the function is configured to provide an approximation of the irradiance, and combining the function with a function of distance, wherein the distance is from the light sources to the point. The method further includes determining an approximation for the irradiance at the point from the combined function with the function of distance based on the normal, the direction, and the distance.

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