[Gegl-developer] Color temperature correction GeglOperation

[Kevin Cozens]

Jan Heller wrote:
> On 11:09, Sat 26 Apr 08, Øyvind Kolås wrote:
>> It would also be nice to replace the planckian locus lookup table with
>> a function that approximates it.
> 
> I played with MATLAB for a while and came up with rational
> functions of degree 5 that approximate the Planckian locus
> dataset reasonably well. Attached is a modified version of
> the operation using these approximations.

I haven't looked at the code yet, but I would have thought execution would be 
faster using the lookup table than having to calculate values using a formula 
especially given that the formula only approximates the values of the table.

-- 
Cheers!

Kevin.

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