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Cosmetic Correction in WBPP

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#1 PhotonHunter1

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Posted 04 June 2023 - 01:12 AM

I typically use the Grouping feature in WBPP to easily combine and process multiple nights of data in a single run. As a part of that process I select and add a CosmeticCorrection process icon. Tonight I am processing M101 which will have 3 differing Dark Master files (Ha, L and RGB - 300s, 60s and 120s respectively). I use a Dark Master and the Auto Detect option when creating the CosCorr process icon and typically use the same 'Level' value for my Hot Pixels. The separate Dark Master files have me thinking I need to create 3 different CosCorr process icons since one dark master will not apply to all 5 Lights file types. Is this correct, or does the dark master not have any impact since CosCorr is embedded in the WBPP process? And if I do need to create separate CosCorr icons, then do I need to add all the associated light files (ex. RBG Lights are 120s therefore I would select the 120s Dark Master and then Add all my RGB Light files)? Am I overthinking this?

 



#2 JohnB1989

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Posted 04 June 2023 - 02:58 PM

I personally use grouping, and have started testing CC on my fully integrated masters. When I ran a test of CC vs non CC pre processed masters I personally saw little to no difference in how many hot pixels CC identifies in each master
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#3 JohnB1989

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Posted 04 June 2023 - 02:59 PM

Pre-pressed subframes**

#4 drmikevt

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Posted 04 June 2023 - 03:34 PM

You are overthinking a bit.  Cosmetic Correction is not meant to be a perfect process - it just corrects most of the problem pixels to take pressure off the stacking algorithms, but it is not meant to get them all.  Or, at least, that should not be the expectation.  It's just one step in the clean up/calibration process.  As mentioned above, the algorithms themselves will do an excellent job of correcting hot pixels, assuming you used dithering during capture.  

 

It sound like you have some pre-set CC settings that have been working well for you.  Just go with those and see what happens.


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