Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

How to add Ha to an RGB image?

  • Please log in to reply
3 replies to this topic

#1 sink45ny

sink45ny

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1913
  • Joined: 08 May 2014
  • Loc: Pennsyltucky

Posted 23 September 2019 - 01:07 AM

PixInsight's PixelMath was used to add Ha to an RGB like so....Is this what other people do?

R/K = red + Ha
G = green
B = blue


Edited by sink45ny, 23 September 2019 - 01:07 AM.


#2 sink45ny

sink45ny

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1913
  • Joined: 08 May 2014
  • Loc: Pennsyltucky

Posted 23 September 2019 - 02:00 AM

Never mind, I forgot all about the NBRGB script.


  • bobzeq25 likes this

#3 drmikevt

drmikevt

    Viking 1

  • *****
  • Posts: 869
  • Joined: 22 Jun 2015
  • Loc: Burlington, VT

Posted 23 September 2019 - 06:50 AM

Although that script can work well, I think the best results are possible with the use of an Ha-continuum mask to eliminate any unwanted Ha glow.  The process is described here and can work very well.  The mask needs a bit of massaging, but really makes a difference in the end.

 

http://pixinsight.co...als/narrowband/


  • FiremanDan and sink45ny like this

#4 Peregrinatum

Peregrinatum

    Ranger 4

  • *****
  • Posts: 380
  • Joined: 27 Dec 2018

Posted 24 September 2019 - 11:01 AM

Could you use mono Ha in place of L?




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics