The Kent distribution, also known as the 5-parameter Fisher-Bingham distribution, is a probability distribution in ℜ^{3}, the real three dimensional coordinate space, of a two-dimensional unit sphere.

The Kent distribution’s probability density function, f(x), is given by the equation:

Here x is a three dimensional unit value. c(κ, β) is a normalizing constant, and is given by the equation

where I_{v}(κ) represents what is called the modified Bessel function.

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