Method and apparatus for level-of-detail computations

Computer graphics processing and selective visual display system – Computer graphics processing – Adjusting level of detail

Reexamination Certificate

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C345S582000

Reexamination Certificate

active

06975320

ABSTRACT:
A method and apparatus for computing a level-of detail (LOD) value for the of texels of a texture map to pixels of a graphics image adapted to receive signals representing texel coordinates for texels of a texture map and pixel coordinates for pixels of a graphics image to calculate a level-of-detail (LOD). The apparatus computes the LOD by calculating the square of the ratio between the number of texels applied to one pixel from the texel and pixel coordinates, approximating a base-two logarithm of the square of the ratio, and dividing the result of the approximation by two to compute the LOD.

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National Semiconductor, Easy Logarithms For COP4000, Sep. 1986, pp 1-12.

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