"Edouard Poor" <pov### [at] edouardinfo> wrote:
> Yeah - I work in a spiral from the center of the image outwards, doing a trace
> at each point. The ones that hit the object get stored in an array. After I've
> finished the spiral, I sort the array based on distance from the camera and
> choose the value at 25% (the, umm, median of the first half - which I presume
> has some statistical name that I either never knew, or long since forgot...).

First Quartile (Q1) = 25th Percentile.

Heh, I never quite knew when knowing that would come in useful, but there it is
:)

See http://en.wikipedia.org/wiki/Quartile for more info.


Cheers
sooperFoX

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