Author Topic: Get histogram values for Astrophotography  (Read 1385 times)

dareius

  • Just arrived
  • *
  • Posts: 2
Get histogram values for Astrophotography
« on: March 20, 2017, 11:01:59 AM »
Hi, all.
First of all i wanna say tanks to all community of ML. your firmware rock!

I am new in astrophotography and sometime I got wrong pictures because I over exposure the subs. So, to take good subs in astrophotography, the luminosity histogram should be placed 1/4-1/3rd from the left (range 0 to 255). How can I get the mean and dev.St value of the luminosity peak?

thanks for your suggestion

calypsob

  • Freshman
  • **
  • Posts: 56
Re: Get histogram values for Astrophotography
« Reply #1 on: September 27, 2017, 06:03:36 PM »
That is a great idea, I think a RAW image statistics function would be great.  Mean, median, std deviation, MAD would all be superb for astrophotography and other scientific applications.   
Full spectrum T2i
T3i

a1ex

  • Administrator
  • Hero Member
  • *****
  • Posts: 10553
  • 5D Mark Free
Re: Get histogram values for Astrophotography
« Reply #2 on: September 29, 2017, 04:33:39 PM »
Is this request something raw_diag doesn't do already?

dareius

  • Just arrived
  • *
  • Posts: 2
Re: Get histogram values for Astrophotography
« Reply #3 on: Yesterday at 10:09:42 PM »
the function of the raw.diagn is not too easy....moreover. it does not work on 1100D with the latest build....
it requires V6 (of what?) instead of version 7.

a1ex

  • Administrator
  • Hero Member
  • *****
  • Posts: 10553
  • 5D Mark Free
Re: Get histogram values for Astrophotography
« Reply #4 on: Yesterday at 11:16:42 PM »
Try the lua_fix build.

edit: hm, it's broken on 1100D...

edit2: solved, please try and report back.