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Best PixInsight star mask for M45?

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4 replies to this topic

#1 Phillip Creed

Phillip Creed

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Posted 05 December 2019 - 12:10 PM

I got about three hours' worth of integration on The Pleiades from November.  I'm trying to draw out the nebulosity as best I can, but I don't want to blow out the stars to Hades and gone.

So I need to have a star mask.  What's the best way to configure one in PixInsight for M45?

Clear Skies,

Phil

 



#2 Stelios

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Posted 05 December 2019 - 12:47 PM

I think Range Selection is what you want. Make sure you have enough blur otherwise your results won't look natural.



#3 bobzeq25

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Posted 05 December 2019 - 01:04 PM

Using MaskedStretch is another possibility.  HDRMultiscaleTransform may be useful.  It can help to do it twice, once in the linear phase, once after stretching.

 

As always, if there are 3 different ways to do something, PI has 6.  <smile>


Edited by bobzeq25, 05 December 2019 - 01:05 PM.

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#4 Madratter

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Posted 05 December 2019 - 01:54 PM

Bob beat me to it. I would suggest using masked stretch. I personally prefer to drop the target background to about .05 and up the iterations considerably to even as high as 1000. You can do further histogram stretching to taste.



#5 Becomart

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Posted 05 December 2019 - 02:50 PM

You can also use the clone stamp tool on the mask to make some fine adjustments. 




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