Author Topic: Help with dnaLinearFit Utility Script  (Read 2244 times)

Offline Robert Q. Kimball

  • Newcomer
  • Posts: 44
Help with dnaLinearFit Utility Script
« on: 2017 October 16 20:33:47 »
I am in the process of building a six panel (2 X 3) mosaic of the Andromeda Galaxy.  I have two questions regarding the proper use of dnaLinearFit.  First some naming information.  I call each of my panels, Panel_1, Panel_2....  When I use StarAlignment to align my panels with the synthetic star field, I call each new image Mosaic_1, Mosaic_2........ I use GradientMergeMosaic to put the Mosaic images  together.  Here are my questions:

1. Do I use dnaLinearFit on the panels or on the mosaics?  Does it make any difference.

2. What order do I do the dnaLinearFit pairs. For example, (1 vs 2), (1 vs 4), (4 vs 5), (5 vs 6), (2 vs 3)

See image at the address:  https://www.dropbox.com/s/uosgg8ym6zj9all/Panels_Numbered.jpg?dl=0


Offline pfile

  • PTeam Member
  • PixInsight Jedi Grand Master
  • ********
  • Posts: 4729
Re: Help with dnaLinearFit Utility Script
« Reply #1 on: 2017 October 16 21:28:10 »
there has to be a (simple) intersection between the images, so they need to be registered first. see: http://trappedphotons.com/blog/?p=994

i don't know if the order matters that much, but i always try to share references as much as possible.

have you tried without dnaLinearfit? sometimes it is not necessary with GMM.

rob

Offline Robert Q. Kimball

  • Newcomer
  • Posts: 44
Re: Help with dnaLinearFit Utility Script
« Reply #2 on: 2017 October 16 22:20:44 »
Thanks Rob.  You've helped me on this several times.  I'm just trying to optimize everything.  Bob