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

["Carlos Milovic F." <cmilovic@yahoo.es>]

> 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.




=====
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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