Re: [APML] LMC & SMC

[Ray Butler <ray.butler@nuigalway.ie>]

Hi Wei-Hao,

Stunning widefield pics with the P67!

Could you tell us whether/how this DBE deals with the combination of 
multiplicative (vignetting) and additive (sky gradient) effects, while 
steering clear of solutions which tend to locally harm the astronomical 
objects themselves? I'm very interested in the algorithmic approach taken.

Ray "recently trying to do exactly that in IRAF, and not entirely happy 
with it yet" Butler

>Hi,
>
>The function to remove sky gradient or vignetting pattern is called
>"dynamic background extraction," which is part of PixInsight's 
>standard version.  The current downloadable version of PixInsight
>is the Limited Edition, which doesn't have that DBE function.   The
>standard version will be a commercial one while the LE version will
>remain free forever.  I don't know when the standard version will be
>launched, perhaps after half year or even longer?
>
>Cheers,
>
>Wei-Hao
>
>  
>


-- 
--
Dr. Ray Butler
Lecturer, Physics & Astronomy | Physics Department | Computational Astrophysics Laboratory
National University of Ireland - Galway, University Road, Galway, Ireland | www.nuigalway.ie
ray.butler-AT-nuigalway.ie | Tel: +353-91-524411 ext 3788  | FAX: +353-91-750584

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