Scott Badger
Well-known member
I'm working on IC1396 and playing with the new debayer process to split my OSC (DSLR) subs into individual color channels and I don't understand a difference I'm seeing vs. an integration of the same subs but without splitting the channels. The workflow I follow when not splitting the channels is....
Debayer
SubSelect and weighting
Align
Integrate
Drizzle Integrate
Dynamic Crop
And the result is, as expected, an integrated image with a pervasive green cast that is largely then removed with DBE and the rest via color calibration and SCNR.
On the other hand, using the split color channels option, I....
Debayer into separate color channels
SubSelect and weight the subs for each color channel separately
Align each channel separately, but using the same reference image for all three
Integrate each channel separately
Drizzle integrate each channel separately
Align the three channels (not sure if this is necessary since they were all aligned to the same reference image in the first place)
Dynamic Crop each using the same crop instance
LinearFit the three integrations to the brightest (red in this case)
ChannelCombine the three channels into an RGB
And the resulting integration *doesn't* have the green cast. Why is that?
Thanks,
Scott
Debayer
SubSelect and weighting
Align
Integrate
Drizzle Integrate
Dynamic Crop
And the result is, as expected, an integrated image with a pervasive green cast that is largely then removed with DBE and the rest via color calibration and SCNR.
On the other hand, using the split color channels option, I....
Debayer into separate color channels
SubSelect and weight the subs for each color channel separately
Align each channel separately, but using the same reference image for all three
Integrate each channel separately
Drizzle integrate each channel separately
Align the three channels (not sure if this is necessary since they were all aligned to the same reference image in the first place)
Dynamic Crop each using the same crop instance
LinearFit the three integrations to the brightest (red in this case)
ChannelCombine the three channels into an RGB
And the resulting integration *doesn't* have the green cast. Why is that?
Thanks,
Scott