Re: interpolation for a color image?

Dave Martindale schrieb:

If you pick a nonlinear color space (say, CIElab) and/or a nonlinear
filter (say, bicubic), things will be not so easy and the results will
be different.

There's no problem with using a bicubic filter for resampling. Although
it is based on cubic polynomials instead of linear polynomials, the
process of resampling with a cubic is still a *linear transformation*.

I stand corrected, you're right. The interpolation is still a linear
function of the input samples indeed, so no problem here either (it
doesn't matter which linear color space you pick here).

We agree otherwise, no further comments on my side.

So long,
Thmas
.