Author Topic: Trouble generating a star mask  (Read 318 times)

Offline carl

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Trouble generating a star mask
« on: 2018 September 23 20:33:36 »
Hi,

I want to create a mask to protect the main central structure and stars. After that I want to apply a histogram stretch to the remaining data. Problem is, every mask I try to produce seems to cover either one or two stars or the entire image. I can't seem to get the parameters correct.

I've followed some tutorials but they haven't been able to get me to the right solution.

Any tips or steps I should be going through that may help with this?

Here's the image: .xsif file

Thanks,
C.

Offline msmythers

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Re: Trouble generating a star mask
« Reply #1 on: 2018 September 23 21:05:32 »
Carl

Is this what your looking for. First I used ABE to equalize the background. Variations in the background make it hard to make a mask that can detect all stars, especially with a linear image. I used the Statistics tool for the parameter values for the star mask tool. I have a video showing the basics of this method. Here is the posting with a link to the video.

https://pixinsight.com/forum/index.php?topic=10890.0


Mike

Offline msmythers

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Re: Trouble generating a star mask
« Reply #2 on: 2018 September 23 21:08:11 »
Here is the full size star mask.


Mike

Offline carl

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Re: Trouble generating a star mask
« Reply #3 on: 2018 September 23 21:14:15 »
Ahhh this is exactly what I was after. Thank you so much.

So killing that background was the first step I was missing.

Thanks,
C.

Offline msmythers

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Re: Trouble generating a star mask
« Reply #4 on: 2018 September 24 00:30:29 »
Carl

Glad that helped.



Mike