J Metsavainio's Tone Mapping In Startools?

Questions and answers about processing in StarTools and how to accomplish certain tasks.

J Metsavainio's Tone Mapping In Startools?

Postby dariv » Tue Jul 10, 2018 7:33 pm

Hello StarTools community....
I've gotten a mono camera and NB filters now and have left the DSLR world behind.
Looking for ways to process the data I came across this tone mapping method that gives some great results, but I can only find tutorials in PI and PS.
Would anyone please describe how to apply this method in StarTools?
Thanks!
dariv
 
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Re: J Metsavainio's Tone Mapping In Startools?

Postby admin » Thu Jul 12, 2018 3:10 pm

Ivo Jager
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Re: J Metsavainio's Tone Mapping In Startools?

Postby dariv » Thu Jul 12, 2018 4:40 pm

Ivo,
Thanks for the response. Yes, star removal is one part of the puzzle. There are several more steps as outlined in the picture below:

Tonemapping.jpg
Tonemapping.jpg (246.83 KiB) Viewed 827 times

https://3.bp.blogspot.com/_9HcYqbvUc4s/SvfETopP2RI/AAAAAAAADc0/G4wBYAFh6jA/s1600-h/Tonemapping.jpg

I'm sure all of these steps are covered in different post on this forum. I'd like to gather all those tutorials up and condense them into a StarTools version of the tone mapping technique. :thumbsup:
dariv
 
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Re: J Metsavainio's Tone Mapping In Startools?

Postby admin » Fri Jul 13, 2018 12:06 pm

Sounds great!

It should all be relatively straightforward;
  • generate starless SHO data using the Heal module (you should only have to create the star mask once; you can use a stretched version of, say, the O III for that).
  • stretch the starless versions using AutoDev or Develop. Save them individually.
  • Import the resulting starless results, stretched SHO images as RGB respectively using the LRGB module. Now you got your HST-color Tonemap. Save this.
  • Now load Ha, stretch it. Go into the layer module and load/add the tonemapped OIII.
  • Copy the result into the buffer, put the buffer into the background, load/add SII and add once more.
  • Save the result as your new luminance data.
  • Now combine the colour from the HST-color Tonemap with the luminance data we just created. You cna use th LRGB for this, or the Layer module (use colour of foreground mode).
  • Pour yourself your favourite drink for a job well done! :obscene-drinkingcheers:
Ivo Jager
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Re: J Metsavainio's Tone Mapping In Startools?

Postby dariv » Fri Jul 13, 2018 12:15 pm

OK, I'm going to give this a try over the weekend.
Thanks!
dariv
 
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