starfield wrote: ↑Sat May 22, 2021 3:13 am
STEVE333 wrote: ↑Wed May 12, 2021 9:23 pm
Thanks Steve for sharing your nice data. And thanks Graeme for taking the time to make this available.
Below is my attempt using PixInsight.
Steve
I like what you did with this Steve. At a high level, what was your workflow? I'm new to
PI and haven't tackled narrowband yet. I still can't get decent LRGB, still haven't mastered the basics of DBE and noise reduction. Really like the depth you got in this rendition.
Thanks for the nice words.
WORK FLOW:
Align and crop the NB images
Reduce noise (I use MultiscaleLinearTransform)
Remove any gradients (ABE or DBE)
Stretch each NB image.
- I try to approximately match the "brightness" and background level of all the NB images. Sometimes I use a blurred RangeSelection mask to select the target and mask the background so that the target can be stretched while the backgrouund (and noise) is not stretched.
Combine the images (Normally ChannelCombination for SHO and PixelMath for HOO)
SCNR (for SHO)
Noise reduction with TGVDenoise (use an inverted Luminance image as a mask to protect brighter regions)
Extract Luminance image
- Sharpen and enhance contrast of Luminance image
Make a clone of SHO (or HOO) image
Increase color saturation of SHO (or HOO) clone
Open LRGBCombination
- Choose the sharpened Luminance image for the L channel and make sure the check box is checked
- Uncheck the R, G and B check boxes
- Drag the blue diamond from LRGBCombination onto the clone
At this point I'm mostly done. I sometimes use the ColorMask Script to adjust colors sligtly.
Hope this isn't too confusing.
Cheers,
Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website:
www.steveking.pictures