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A comment on Show HN: Trigrad, a novel image compression with interesting results. Parent comment

Re:Show HN: Trigrad, a novel image compression with interest... by jacobolus on Saturday July 04, 2015 @03:46AM (#9829573)
To the OP: There are also several other tools for scattered data approximation/interpolation developed in the last few decades, both mesh-based and mesh-free. Linear interpolation using barycentric coordinates on a triangulation is fast (and might be the most practical method for this particular use case), but nowhere near as good a result as you can get via other methods.

See e.g. http://scribblethink.org/Courses/ScatteredInterpolation/scat...

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Re:Show HN: Trigrad, a novel image compression with interest... by ruarai on Saturday July 04, 2015 @05:16AM (#9829699)
Not sure if that applies for my purposes, since I'm not actually using linear interpolation barycentric coordinates (I don't think that's possible). The barycentric coordinates supply the gradient within themselves.

I may have to read further, though. That's a lot of math.

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Re:Show HN: Trigrad, a novel image compression with interest... by jacobolus on Saturday July 04, 2015 @08:36PM (#9832071)
What you’re calling a gradient is also known as linear interpolation.
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