Re: [APML] OT: DSS image processed: Barnard 142/143 Complex("E" Nebula)

[Vicent Peris <vicent@cepheusastrophoto.com>]

Hi Carlos,


At 22:09 13/10/2004 +0200, you wrote:
> > I have been investigating during the last
> > 4 - 5 months large scale processing; and the problem
> > is that on the large scale wavelet layers there are
> > information introduced by small scale / high
> > contrast
> > features.
>
>Yes. The wavelet decomposition is unable to isolate
>those features in a high-frecuency layer only. They
>generate reflections in the upper scales. It would be
>interesting to device another scaling function wich
>can isolate all the stars just in one layer (the first
>one), and then decompose the rest of the image without
>them.
>
>
> > So to process properly the large scale
> > features
> > of an image, first you must have on the image ONLY
> > that large scale objects: you must erase small scale
> > objects on the image. It is possible, but it takes
> > usually for me about 1 to 2 hours of work in
> > PixInsight.
> >
>
>Of course that there are other easier ways, ;-)
>Try Wei-Hao's method to supress the stars.
>I'll post the "how to" tonight, using PI.
>

Supressing stars is only one step more...

Regards,
Vicent.





>=====
>Regards,
>
>Carlos Milovic F.
>-------------------------
>Astro & Photo - CMF
>http://www.astrophoto.vze.com
>-------------------------
>Visita "AstroFoto", el foro de astrofotografía en español
>http://espanol.groups.yahoo.com/group/astrofoto
>
>
>
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Vicent Peris
http://www.cepheusastrophoto.com/Index.html

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