Rodd Posted April 1 Share Posted April 1 Sometimes it pays to be creative. In this image, I added a lightness channel (luminance) from a SHO image to an RGB image. The RGB has about 9 hours of data. It was just an experiment. I think it was pretty convincingly a success. ”L”RGB Original RGB 11 Link to comment Share on other sites More sharing options...
symmetal Posted April 1 Share Posted April 1 Yes, it certainly makes a difference. Impressive result. Have you tried just adding the Ha as the L channel. It should be less noisy than the SHO derived L, although it doesn't appear to have added noise to your image. The Oiii in your L may have improved the detail in the Blue structures, so maybe you made the right choice. 🙂 Alan Link to comment Share on other sites More sharing options...
Rodd Posted April 1 Author Share Posted April 1 58 minutes ago, symmetal said: Yes, it certainly makes a difference. Impressive result. Have you tried just adding the Ha as the L channel. It should be less noisy than the SHO derived L, although it doesn't appear to have added noise to your image. The Oiii in your L may have improved the detail in the Blue structures, so maybe you made the right choice. 🙂 Alan Yes. The first thing I tried was adding the Ha. It adds detail, but It turns the image light pink. That tends to happen when you use Ha as a luminance (or lightness). I guess I could have added it to the red channel like typically done. Maybe I should try that AND what I did. 1 Link to comment Share on other sites More sharing options...
ollypenrice Posted April 3 Share Posted April 3 Very good separation of the reflection nebulosity. Olly Link to comment Share on other sites More sharing options...
Rodd Posted April 3 Author Share Posted April 3 1 hour ago, ollypenrice said: Very good separation of the reflection nebulosity. Olly Thanks, Olly. I really need more blue, but time slipped away. Lately (for the last 6 months) I have been averaging about a day/month. It’s terminally overcast. 1 Link to comment Share on other sites More sharing options...
gorann Posted April 3 Share Posted April 3 Really nice! Getting that blue out in this object is a challenge! Using Ha as Lum, as suggested, is usually a bad idea and as you say it turns everything salmon coloured, In this case it would really suppress your blue signal. Link to comment Share on other sites More sharing options...
Rodd Posted April 3 Author Share Posted April 3 1 hour ago, gorann said: Really nice! Getting that blue out in this object is a challenge! Using Ha as Lum, as suggested, is usually a bad idea and as you say it turns everything salmon coloured, In this case it would really suppress your blue signal. Thanks, Goran. The lightness channel of the SHO image worked well--and I used an extracted blue channel as a mask to protect the reflection nebula, so it wouldn't be diluted. I was pleasantly surprised. 1 Link to comment Share on other sites More sharing options...
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