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Bilinear/Spline how to use them?
Posted: Mon Sep 03, 2012 5:46 pm
by Firefly
In ISIS's setting Tab, Interpolator type has Bilinear/Spline. I want to know what their difference is? and at what kind of situation shall I use Bilinear? what situation is better to use Spline?
Thanks.
Dong .Li
Re: Bilinear/Spline how to use them?
Posted: Wed Sep 05, 2012 2:21 am
by Christian Buil
Spline interpolator give sharpen spectra (less low pass filter effect during processing). But be carrefull if your spectrum show very contrasted features (planerary nebula spectrum for example) : spline interpolation can produce artifact at the base of spectral lines. I recommand, specially for LISA users, to select the linear interpollator for all standard work.
Christian B
Re: Bilinear/Spline how to use them?
Posted: Thu Sep 06, 2012 2:12 am
by Firefly
Thank you ! Mr.Buil.
Dong .Li