Author Topic: When Not How!!!!!!  (Read 2216 times)

Offline tdgm

  • PixInsight Addict
  • ***
  • Posts: 269
    • View Profile
When Not How!!!!!!
« on: 2016 December 22 13:07:25 »
Hello everyone

So I have finally settled on a linear workflow DC,DBE(ABE),BN,CC,Ext RGB Syn Luminance creation,Decon SL,Linear NR on RGB and SL then stretch (prefer Harry's HT Masked stretch combination).  So now that I am non Linear WHAT IS THE WORKFLOW? Just looking for people's opinion. What order of Noise reduction LRGB combination, color enhancement as well as contrast enhancement, HDRWLT, Sharpening and black point adjustment?

Thanks

Steve

Offline jkmorse

  • PixInsight Padawan
  • ****
  • Posts: 916
  • Two questions, Mitch . .
    • View Profile
    • Jim Morse Astronomy
Re: When Not How!!!!!!
« Reply #1 on: 2016 December 31 14:27:37 »
Here's my post stretch list:

27.   Increase Color Saturation (Saturation or Curves)*
28.   Apply SCNR to remove excess green
29.   Use CurvesTransformation to adjust Saturation, Hue and color, especially for NB*
30.   Non-Linear Noise Reduction of RGB/NB and Lum (MMT and/or TGVD)*
31.   HT Touchup of images (reset black point w/o clipping); repeat as needed below
32.   Star Align RGB/NB and Lum Images (not necessary with a SynLum)
33.   LinearFit Lum & L component of RGB/NB images, then do LRGB/LNB Combine
34.   If needed for HDR image, use HT to brighten target, w/o saturating**
35.   HDRMT to increase detail*
36.   Morphological Transformation to tighten stars*
37.   MLT and/or MMT for sharpening*
38.   Dark Structure Enhancement*
39.   LHE application*
40.   Clean up background using MorphologicalTransformation, Convolution & DeSat*
41.   Final Saturation Curve touch-up


This is all from my workbook which I share with about 200 PI users around the world.  If you are interetested, just drop me a line at jkmorse57@gmail.com.

Best,

Jim
Really, are clear skies, low wind and no moon that much to ask for? 

New Mexico Skies Observatory
FLI Microline 16803
Planewave CDK17 - Paramount MEII
Planewave IFR90 - Astrodon LRGB & NB filters
SkyX - MaximDL - ACP

http://www.jimmorse-astronomy.com
http://www.astrobin.com/users/JimMors

Offline tdgm

  • PixInsight Addict
  • ***
  • Posts: 269
    • View Profile
Re: When Not How!!!!!!
« Reply #2 on: 2016 December 31 21:22:24 »
Thanks JK

I already have your book and it has been a great reference. I see that after going non linear on RGB and SL your boast color (RGB image)and NL Noise reduction before a LRGB combination. I have been doing the LRGB combo right after stretching and linear fit than boasting color in LRGB combo plus boasting wit curves and or Saturation. Do you have any reason to do it before LRGB versus Qfter?

Steve

Recently have been practicing individual modules to laern how they work on my data EXPERIMENT EXPERIMENT EXPERIMENT!!!!!!!


Thanks for the response and CLEAR SKIES

Steve

Offline jkmorse

  • PixInsight Padawan
  • ****
  • Posts: 916
  • Two questions, Mitch . .
    • View Profile
    • Jim Morse Astronomy
Re: When Not How!!!!!!
« Reply #3 on: 2017 January 04 10:01:46 »
Steve,

The reason I boost saturation is that the colors tend to get washed out as a part of the combine and that helps preserve deeper colors.

As simple as that.

Best,

Jim
Really, are clear skies, low wind and no moon that much to ask for? 

New Mexico Skies Observatory
FLI Microline 16803
Planewave CDK17 - Paramount MEII
Planewave IFR90 - Astrodon LRGB & NB filters
SkyX - MaximDL - ACP

http://www.jimmorse-astronomy.com
http://www.astrobin.com/users/JimMors

Offline tdgm

  • PixInsight Addict
  • ***
  • Posts: 269
    • View Profile
Re: When Not How!!!!!!
« Reply #4 on: 2017 January 04 23:30:58 »
Hi JK

I boost the chrominance in the LRGB with the slider. DOoes doinr that color boost in the LRGB Combine deepen the colors as much as my way?


Steve

Offline jkmorse

  • PixInsight Padawan
  • ****
  • Posts: 916
  • Two questions, Mitch . .
    • View Profile
    • Jim Morse Astronomy
Re: When Not How!!!!!!
« Reply #5 on: 2017 January 05 08:17:30 »
Steve,

Best answer is to test both ways.  I find that you get better control over what you want to saturate with CurvesTransform for sat before combine.  The slider in LRGB Combination is a much less subtle tool.

Jim
Really, are clear skies, low wind and no moon that much to ask for? 

New Mexico Skies Observatory
FLI Microline 16803
Planewave CDK17 - Paramount MEII
Planewave IFR90 - Astrodon LRGB & NB filters
SkyX - MaximDL - ACP

http://www.jimmorse-astronomy.com
http://www.astrobin.com/users/JimMors

Offline tdgm

  • PixInsight Addict
  • ***
  • Posts: 269
    • View Profile
Re: When Not How!!!!!!
« Reply #6 on: 2017 January 05 12:51:52 »
Thanks Jim I will keep that in mind and yes using curves gives you a lot more flexibilty.


Steve