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Over saturated stars when combining RGB

Astrophotography Beginner Imaging
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#1 anhqpham

anhqpham

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Posted 21 November 2023 - 12:37 AM

Hi! I've been struggling with this issue when processing my LRGB data and would like to figure out a solution for this. Here are my steps after stacking 
- DBE on all RGB images 

- Linear fit 

- BlurXTer & NoiseXTer (optional) 

- Combine RGB images 

 

When combining my linear R,G,B images into a color image I got over saturated stars like the image attached here. However, if I stretch individual images before combing into the color image, the image looks fine. I'm puzzled by this because I've seen other Youtube videos where stretching if performed after combining RGB images. What am I doing wrong here? 

 

My setup: 
- EdgeHD 8 with 0.7 reducer 
- ASI2600MM 

- LRGB filters from Baader 

Integration details:
- ~1h30' on each color (10s, 30s, 60s subs)

- BIN2

 

PS: A work around for me is just stretch individual colors then combine the RGB but doing that I wouldn't be able to use GeneralizeHyperbolicStretch (GHS) which I believe is great for stretching hard target like M42.

Attached Thumbnails

  • Screenshot 2023-11-20 at 9.12.24 PM.png


#2 mehdymo

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Posted 21 November 2023 - 01:05 AM

May be removing the stars and adding them later?


  • rj144 likes this


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