It's been a long time since capturing anything worth posting so I've been trying to get back into PI processing. This is one of my 2016 Astrofest images that I haven't completed processing as I've had a lot of trouble with the RGB data. I thought the Lum on the other hand was looking promising.
This is 56x5 min subs using the SN10/QSI683, stacked and hist stretched in PI.
Peter,looking good...lots of little galaxies in the background too low surface brightness galaxies are always tough ones so well done.
Thanks for the encouragement Louie.
Quote:
Originally Posted by strongmanmike
Looks good Pete, it's a magnificent galaxy even in B&W, what's the problem with the RGB?
Mike
Cheers Mike. The RGB data was showing a lot of noise when I stretched it. I need to spend some more time re-familiarising myself with PI I think. I've recently upgraded my image processing laptop so no excuses now.
Quote:
Originally Posted by Atmos
Although large it is a relatively dim galaxy, your luminance is showing it up well.
Thanks Colin.
Quote:
Originally Posted by Geoff45
Lots to look at there Peter. I look forward to the colour version. It should be a ripper.
Geoff
Finally got back to processing this - spent most of this afternoon playing with the upgraded desktop, a lot faster than the laptop! Also had to remember how to use PI as it has been a while. Luckily Warren came to the rescue
This data was from Astrofest 2016.
36x5min Lum
12x2min RGB
14x5min Ha
Yes I agree. Got the monitors calibrated now. Just trying to work out the best way to reduce the green.
The background looks pretty neutral so I'd try a clipped luminance mask and just pull down the green a tad (or boost the red, or a combination of both) with CurvesTransformation.
OK - here's the first repro. User ColourMask to pick out the greens and then adjusted with CurvesTransformation using a and b. I think the colour of the core looks better but not so sure about the cyan in the arms.
OK - here's the first repro. User ColourMask to pick out the greens and then adjusted with CurvesTransformation using a and b. I think the colour of the core looks better but not so sure about the cyan in the arms.
I think you need to reduce the green in general, so I'd use a clipped lum mask. That should help with the cyans too (will make them bluer.)
Quote:
Originally Posted by peter_4059
I wonder if it is optics, processing or something else?
It's probably a combination of many small improvements across all aspects of capture and processing. That's my experience, anyway. You make several barely perceptible improvements and the improved quality of the result is suddenly obvious.
Hopefully I'll get more time with it now I have it installed on the desktop. Dragging out the monitor for the laptop was becoming a good excuse to avoid processing.
low surface brightness galaxies are always tough ones so well done.
