Should we add color tables?

[NAThompson]

After adding the bilinear interpolator I realized a good QC would be to make an png image using it, via a scientific color table.

I've already written a color table code here; would it be a good match for this library?

[mborland]

I would vote that it would be useful to have in tools; there is already other plotting functionality in there. The end user would then have a documented tool internal to the library instead of having to roll their own solution from something like matplot++.

[jzmaddock]

+1.

What are you using to write the output file - Boost.GIL, or something else?

[NAThompson]

I've used lodepng to write the files; see here. I think Boost.GIL would also be a good choice for example code.