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Old 29-11-2017, 03:06 PM
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Fabian Neyer Star Removal Method for PI

Adam Block has been working on a tutorial for star removal in PixInsight using a method from Fabian Neyer:

Quote:
For the past few years Fabian Neyer has been demonstrating a technique of star removal that is based on practices that professionals use. He cites this paper of showing the intragalactic glow between members of the virgo cluster:

http://iopscience.iop.org/article/10.../720/1/569/pdf
Adam's first video is here: https://youtu.be/1rEBbZhsDIU

There's a second video coming in the next day or so.

The process doesn't look any less painful and time consuming that what I do at present, but it does a much better job of removing star halos and the wings of star PSFs to give a pure starless result.

Cheers,
Rick.
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Old 29-11-2017, 04:39 PM
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Second and final video: https://www.youtube.com/watch?v=nD-JhXikmRE
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Old 29-11-2017, 05:41 PM
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Looks very interesting and definitely much more sophisticated than my routine with a single star mask and AWT - thank you Rick for sharing.

BTW, I could easily take out the halos around the largest stars with a CloneStamp
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Old 29-11-2017, 07:08 PM
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Haven't watched the entire videos but what I saw of the first one looks good. Will have to reference this when I finally get back to imaging. Thanks for sharing, Rick!
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Old 29-11-2017, 07:13 PM
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Quote:
Originally Posted by Slawomir View Post
Looks very interesting and definitely much more sophisticated than my routine with a single star mask and AWT - thank you Rick for sharing.

BTW, I could easily take out the halos around the largest stars with a CloneStamp
Yes, it's quite a process, Suavi. I have been wondering if it can be at least partly scripted.

I also use CloneStamp as a last, but effective, resort

Quote:
Originally Posted by codemonkey View Post
Haven't watched the entire videos but what I saw of the first one looks good. Will have to reference this when I finally get back to imaging. Thanks for sharing, Rick!
Some good ideas just for building star masks in the first one, Lee. Hope you're back into it soon...
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Old 29-11-2017, 07:14 PM
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Was interesting watching both of them. It's nice to see that some of the things I was doing is actually being done by others and not just adhock on my behalf
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Old 29-11-2017, 07:21 PM
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Quote:
Originally Posted by RickS View Post
Yes, it's quite a process, Suavi. I have been wondering if it can be at least partly scripted.

I also use CloneStamp as a last, but effective, resort
I was actually going to ask you about scripting...

I confess of using CloneStamp on large halos, but only on colour data - never on Luminance
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Old 30-11-2017, 07:47 AM
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Quote:
Originally Posted by Atmos View Post
Was interesting watching both of them. It's nice to see that some of the things I was doing is actually being done by others and not just adhock on my behalf
It's always interesting to see how other folks do stuff.

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Originally Posted by Slawomir View Post
I confess of using CloneStamp on large halos, but only on colour data - never on Luminance
That sounds fair, Suavi
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Old 30-11-2017, 09:48 AM
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Star Masks
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Old 30-11-2017, 03:19 PM
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Star Masks
Gotta love 'em, Dunk
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Old 30-11-2017, 08:34 PM
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The Devil's work
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Old 01-12-2017, 09:14 AM
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A few things in here I might adapt to my existing process based on Gerard's method. Will have to run a processing comparison and see if this is better for my workflow as is or to guide improvements in my workflow.
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Old 24-01-2018, 09:40 AM
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Had a bit of a play around watching this technique last night, and playing with some of my images. Quite a process. I couldn't get a good result, but was more than likely my impatience and tiredness. I'll have to revisit when fresher and more time. If nothing else, did give some tips/ideas on mask generation for other processing work.
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