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LRGB Workflow

Charles Duarte
in PixInsight
Hi guys, I have read and process through these years different workflow ways, and different people uses different ways, and although I process my images in different ways, and would like to establish a workflow that I would used constantly.

This is my current WFlow and would appreciate any comment that might improve it.

1. WBPP
2. Alignment
3. Integration
4. DBE (each filter)
5. Noise Reduction -MLT or even MURE
6. Deconvolution
7. Linera Fit
8. RGB Combination
9. Back Neutralize
10. Color Calibration or PCC
11. STF to HT (non-linear)
12. Noise Reduction-ACDNR
13. Star Reduction using MT or Star mask
14. From here I use Curves and Color Saturation for Narrowband, or send to Photoshop.
15. LRGB
16. Luminance

(a) Copy Lum and apply STF to HT
(b) Deconvolution
(c) Apply mask /PSF
(d) Apply TGV
(e) Apply MMT.
(f) Might stretch Lum (HT)
(g) Match RGB luminosity with Lums using Linear Fit
(h) Create LRGB
17. Might apply a final ACDNR or/and SCNR.
18. Maybe retouch in Photoshop.
 
Thanks
Charles

Comments

  • BlockHeadBlockHead
    1. WBPP including Alignment is OK.
    2. NormalizeScaleGradient
    3. ImageIntegration
    4. DBE (OK)
    5. MUREDenoise (OK) MLT? This is not my methodology. Usually better to wait for non-linear
    6. LInear Fit DO NOT MAKE MY HEAD EXPLODE! This is not sanctioned by AdamBlockStudios! lol I assume you are applying this to the RGB channels. If it is of any importance... Juan Conjero agrees with me. 
    7. RGB Combination Ok
    8. Back Neutralize OK
    9. Color Calib or PCC OK
    10 Decon? (luminance) You had better have *really* good data. This is not an everytime thing. You need oversampled and high signal data. 
    11. Convert to Non-linear OK
    12. ACDNR Why? So much blurring you like? Wait... patience. Wait until after you apply come contrast.
    13. Star Reduction (optional)... why not consider my method?
    14. Contrast adjusments
    15 LRGB OK
    16. Luminance... depends on data a-g

    -the Blockhead 

  • Charles Duarte
    Hi thanks for the reply, on the Linear Fit , yes it goes after the RGB combination, my understanding is that its a process to ensure that the relative strength of the signal in each of the colour channels is similar, this is the reason why I used it, it a help to see a proper colour balance between the channels.

    On Deconvolution I target the Lum stars only to shrink it a bit at this stage before convention to non-linear. 

    Adam, is there a workflow in your web pages that I can examine??

    Thanks

    Charles 
  • BlockHeadBlockHead
    edited August 2021
    I am sorry, this understanding concerning RGB and LinearFit  is not correct. 

    Regarding Deconvolution- just using Decon to "shrink" stars is likely not the best use of the tool. There are other techniques that perhaps attain a similar result with much less effort. Typically Decon is for the reconstruction/sharpening of details of an object. This could be stars if the object only has stars- but in general Decon and its effort is best used to sharpen details of nebulae and galaxy bits. 

    There isn't a standardized workflow per se (I have indicated it in the list as a response to your question!). 
    Different data require different workflows. The workflow sections in Fundamentals and PI Horizons Edition of the Cosmic Canvas (more sessions/objects) demonstrate the things that are relatively constant and those things that change depending on the data. In my opinion, demonstrating this variation and the thought process is more important than a formulaic recipe. 

    -the Blockhead
  • Charles Duarte
    Thanks for replying and your thoughs.

    Best
    Charles


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