Author Topic: Video Tutorial for Newbs - Fixing badly warped stars  (Read 1645 times)

Offline calan

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Video Tutorial for Newbs - Fixing badly warped stars
« on: 2017 April 04 22:26:12 »
I'm new to PI, but have put a lot of hours in and am slowly getting up to speed. Having an old mount, cheap optics, wobbly deck, and constant wind gives me plenty of not-so-great data to work with, so I've been forced to learn fast.

After several (as in SEVERAL) hours of experimentation, reading, and trying different approaches to correct some badly warped stars, I came up with a workflow that so far has given me good results. So, I thought I would make a video tutorial on how I did it, in the hopes that maybe it will help someone else out. It's not a professional production by any stretch; no fancy graphics, sound effects, or animations... just me flying by the seat of my pants and talking on a headset mic that distorted every now and then. But then again, I don't get paid for my mad skilz in video production, so hopefully someone can still get something out of it.  :cheesy:

The video can be found here: http://www.jcsautomation.com/pixinsight/starfix.mp4

As a test example for the video, I used an image of M76 that I processed in PI a couple of weeks ago, and performed this workflow to correct the ugly stars. Although the final results could still be tweaked for a little more accuracy (and there are a few stars I shouldn't have messed with), it actually made for a pretty good down-and-dirty example. Here are some before and after images, showing the results:

Before




After



I'm sure there are better methods, and I'm sure there are die-hard purists out there that cringe at the thought of not having perfect data to begin with. With that said, this is just what works for me.  YMMV

- Craig
« Last Edit: 2017 April 04 23:30:36 by calan »

Offline FunTomas

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Re: Video Tutorial for Newbs - Fixing badly warped stars
« Reply #1 on: 2017 April 05 03:04:21 »
Very interesting video. I am looking for method to obtain nice soft stars. Your workflow looks very good.

Offline niteman1946

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Re: Video Tutorial for Newbs - Fixing badly warped stars
« Reply #2 on: 2017 April 05 04:53:39 »
Well done Craig.

Mark

Offline calan

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Re: Video Tutorial for Newbs - Fixing badly warped stars
« Reply #3 on: 2017 April 05 20:49:58 »
Thanks guys. I've refined the process with better mask-making and a few minor tweaks, and will try to get an updated video posted when I get a chance.

Here is a link to the latest full resolution version of the M76 image:

https://www.flickr.com/photos/124386138@N05/33482538720/in/album-72157678932902193/

Offline james7

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Re: Video Tutorial for Newbs - Fixing badly warped stars
« Reply #4 on: 2017 May 13 00:49:45 »
Thanks for contributing the video.