https://www.astrobin.com/z6t0k6/K/
The image is an SHO image with RGB stars.
The following process is used for all NB channels to prep each channel (SHO).
- WBPP
- NormalizeScaleGradient with Drizzle
- Imageintegration
- DrizzleIntegration - Kernelfunction = Gaussian, DropShrink=0.8, KernelGridSize = 20
- GradientCorrection
- DynamicCrop
- BlurXTerminator (Correct Only)
- LinearFit
- BlurXTerminator (Sharpen non stellar = 50%, sharpen stars = 10%)
- StarXTerminator (Large Overlap)
- NoiseXTerminator (Denoise=40, Detail=15)
- Manual stretch with HistogramTransformation
- Finetune with CurvesTransformation
- Finetune details with GHS
Sii stretched - https://www.astrobin.com/z6t0k6/L/
Ha stretched - https://www.astrobin.com/z6t0k6/M/
Oiii stretched - https://www.astrobin.com/z6t0k6/N/
I combined my NB channels with ChannelCombination and extracted the CIE L component.
The L has been only slightly modified:
- NoiseXTerminator
- CurvesTransformation
L Component - https://www.astrobin.com/z6t0k6/O/
I created an ACDNR mask of the light image to target all the background I would later need to control.
I discarded the RGB image again.
I then recombined my NB channels with ChannelCombination into a new RGB image.
The RGB image has been processed in the following way:
- Bill Blanshans, NarrowbandNormalization (Preserve Lightness, SHO Palette)
- CorrectMagentaStars to remove Magenta residual from the image
- Created a variety of color masks (Red, Blue, Yellow, and others that targeted very particular areas of the image in various Red and Yellow colour strengths)
- Curvestransformation with the different color masks, to accentuate colors and areas in the image.
- LRGB combination with the L component
- CurvesTransformation with previous inverted ACDNR mask to "dial down" background light a bit.
- Local Histogram Equalization (Radius 240, 12 bit, slope limit 2, amount 0.150)
By using color masks I find that I have more control over how the colors are controlled in the image.
I have tried Bill Blanshans scripts, NBColorMapper and others.
Above is heavily inspired by these 2 Youtube videos:
https://www.youtube.com/watch?v=cn7UGWlPxfI
https://www.youtube.com/watch?v=fo6E0pBvdLQ
The RGB Image was now loaded into ImageBlend:
- Created a High Pass filter image
- Blend High Pass Image to original to sharpen contrast
- Created a Darken/Min and Lighten/Max image from newly created sharpened image
- Blend Darkened and Lightened image to a Final blend.
Apply RGB stars to final blended image using ScreenStars Script.
Reduced stars with Star Reduction script.
That's the used workflow.
Input etc. are more than welcome.
