Very, very new to Pixinsight as well as AP in general. I am capturing with a Sony A7Riv, in uncompressed raw.
What I've gathered from various documents is I should:
- capture the raw data, including for flat, bias and dark
- Create master flat, bias and dark, anywhere "CFA" is mentioned let it detect and/or check the box.
- Go through cosmetic correction like that, then debayer
When I debayer it automatically finds it for real raw, and those captured as FIT by APT I have to tell it RGGB, but I've verified I get the same image to that point whether FIT or raw.
After all that I get a strong, strong color cast. The latest set was bright blue.
So as an experiment I took a shot of a Macbeth chart and processed it through debayer. It's really green. So (thinks I) I have 2 greens, and indeed if I got into curves and drop green about half it looks better. But I also read that Debayer is supposed to be handling that for me. Even after adjusting green it's a poor color result.
A lot of advice seems to be "ignore it all, work it out in subsequent steps". Ok, I can (and have) done that.
But my question is more fundamental -- what should I have gotten? Is there something wrong in my steps to the debayer point that leads to a strong color cast, notably on a terrestrial shot of a color chart. Or is all this just plain normal and "fix it in post" is the motto?
Thanks,
Linwood
What I've gathered from various documents is I should:
- capture the raw data, including for flat, bias and dark
- Create master flat, bias and dark, anywhere "CFA" is mentioned let it detect and/or check the box.
- Go through cosmetic correction like that, then debayer
When I debayer it automatically finds it for real raw, and those captured as FIT by APT I have to tell it RGGB, but I've verified I get the same image to that point whether FIT or raw.
After all that I get a strong, strong color cast. The latest set was bright blue.
So as an experiment I took a shot of a Macbeth chart and processed it through debayer. It's really green. So (thinks I) I have 2 greens, and indeed if I got into curves and drop green about half it looks better. But I also read that Debayer is supposed to be handling that for me. Even after adjusting green it's a poor color result.
A lot of advice seems to be "ignore it all, work it out in subsequent steps". Ok, I can (and have) done that.
But my question is more fundamental -- what should I have gotten? Is there something wrong in my steps to the debayer point that leads to a strong color cast, notably on a terrestrial shot of a color chart. Or is all this just plain normal and "fix it in post" is the motto?
Thanks,
Linwood