Mike in Rancho wrote: ↑Sat Oct 16, 2021 8:59 pm
Hmmm. Not super duper following Ivo's explanation here (need to have a yellow pad nearby so I can make charts with arrows and stuff
).
Maybe it's in the Elf thread referenced. Freddy are you compositing as L, RGB? Not one of the choices with a synthetic L (including the bicolor options)?
That would make sense of the description then. However, G and B are not turned into GB unless you did that separately beforehand, which could also later affect things in the color module, even if you were able to change it to the HOO matrix. Would almost require being careful to manually balance the G and B to ensure the bicolor.
Mike,
this is how i started after off course have created the red and green/blue tiff files needed for HOO, but you need to create first the files needed for the HOO approach
So for red use compose load osc in red, and save as tiff file
then
in compose again load osc in green and blue and sae as tiff file
-----------------------------------------------------------
StarTools 1.7.461
Thu Oct 14 18:42:16 2021
-----------------------------------------------------------
Loading luminance channel data
File loaded in LRGB module [C:\WorkFolder\SoulStacks\Dubbelderp\Ha_Soul-reg.fits].
Loading red channel data
File loaded in LRGB module [C:\WorkFolder\SoulStacks\Dubbelderp\HOO\Ha_Red_Channel.tiff].
Loading green channel data
File loaded in LRGB module [C:\WorkFolder\SoulStacks\Dubbelderp\HOO\OIII_BG_Channel.tiff].
Loading blue channel data
File loaded in LRGB module [C:\WorkFolder\SoulStacks\Dubbelderp\HOO\OIII_BG_Channel.tiff].
--- Compose
Parameter [Luminance, Color] set to [L + Synthetic L From RGB, RGB]
(still unsure about this setting)
Parameter [Color Ch. Interpolation] set to [On]
Parameter [Lum Total Exposure] set to [1h00m (60m) (3600s)]
Parameter [Blue Total Exposure] set to [1h00m (60m) (3600s)]
Parameter [Green Total Exposure] set to [0h01m (1m) (60s)]
Parameter [Red Total Exposure] set to [1h00m (60m) (3600s)]
Image size is 5478 x 3892
Type of Data: Linear, was not Bayered, or was Bayered + white balanced
But in the color module you should i think you have to do this
"Be sure to set 'LRGB Method Emulation' in the Color module to 'RGB Ratio, CIELab Luminance Retention', because 'Straight CIELab Luminance Retention' will not yield much color due to the luminance and chrominane spectra being completely different."
I might have even forgotten this...
I did have to use 2x saturate in the Superstructure module.
Then a red/pinkish and cyan OIII nebuluae should come out.
As Cyan is not very pleasing i was able to turn this in GIMP to a more 'appropite' nicer blue...;(This i could not do at the time with my Rosette for some reason)
Hope this helps