[Gimp-developer] Advanced Interpolation

[Nicolas Robidoux]

John, David and Bill:

jcupitt at gmail.com writes:
 > 2009/1/24 David Gowers <00ai99 at gmail.com>:
 > > a) You should investigate implementing this interpolation method for
 > > GEGL rather than GIMP, as in the fairly near future these kinds of
 > > transformations in GIMP will be implemented through use of GEGL.
 > 
 > My understanding is that this will not be possible in GEGL as things
 > stand, since GEGL does not give interpolators the local slopes. In
 > other words, a GEGL interpolator is just asked for the value at
 > (double x, double y), it can't find out how closely spaced the
 > surrounding sample points are.
 > 
 > No doubt this could be added or changed. I think other interpolator
 > authors have been asking for this feature as well.
 > 
 > John
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 > Gimp-developer at lists.XCF.Berkeley.EDU
 > https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer

For example, it is my opinion that pleasant looking and fast
downsampling hinges on such information being available to a
resampler.

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Suggestion:

GSoC season is upon us. I think that building some kind of "gradient
information" into GEGL this would make a good GSoC project.

Nicolas Robidoux
Universite Laurentienne/Laurentian University