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Spherical gaussian

Started by Zarathustra Mar 10, 2008 at 7:00 PM 0 replies 2.3k views

Original Post

Mar 10, 2008 at 7:00 PM

So the line in the paper I'm implementing says the following: "Each level of the mip-map is computed by convolving the environment map with a spherical Gaussian that has twice the standard deviation of the previous level" So my question here is, what is a spherical gaussian? I need some kind of formulation in function of theta and phi.

Geoff the Medio

Mar 11, 2008 at 6:18 AM

Quote:
Original post by Zarathustra
So the line in the paper I'm implementing says the following:

"Each level of the mip-map is computed by convolving the environment
map with a spherical Gaussian that has twice the standard deviation of the previous level"

So my question here is, what is a spherical gaussian? I need some kind of formulation in function of theta and phi.

The angular component is probably constant. That is, there is no dependence on angles "theta" and "phi".

Rather, the spherical gaussian is probably defined

F(r, theta, phi) = A*exp(-r^2/sigma^2)

where r is radial distance.

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