There’s good detail in that pic Adam, but as you mentioned the colour doesn’t seem quite right. Did you try the PhotometricColorCalibration in PI?
Geoff
Very nice galaxy shot, considering its size you've captured a lot of detail in the spiral arms. Bit purple in the galaxy (but not the stars) but the data looks great
There’s good detail in that pic Adam, but as you mentioned the colour doesn’t seem quite right. Did you try the PhotometricColorCalibration in PI?
Geoff
Thanks, no matter what settings I tried, PCC could not find a star in the image. I've never had an issue with it before. Astrometry.net solved it, TheSkyX solved it, even PixInsight's ImageSolver script solved it. I have no idea why.
Quote:
Very nice galaxy shot, considering its size you've captured a lot of detail in the spiral arms. Bit purple in the galaxy (but not the stars) but the data looks great
Originally I had manually tried to shift the arms towards blue, then I saw Adam Block's rendition. There's definitely some red in the arms, but I guess I didn't have the aperture to separate the blue & red properly.
I'm not a fan of the purple but it looks nice otherwise.
Quote:
Originally Posted by furgle
Thanks, no matter what settings I tried, PCC could not find a star in the image. I've never had an issue with it before. Astrometry.net solved it, TheSkyX solved it, even PixInsight's ImageSolver script solved it. I have no idea why.
You can load the plate solve from an image solved with ImageSolver into PCC. Just use the button that says something like "Acquire from image".
I'm not a fan of the purple but it looks nice otherwise.
You can load the plate solve from an image solved with ImageSolver into PCC. Just use the button that says something like "Acquire from image".
Cheers,
Rick.
Thanks Rick, that worked.
Now to find some more time to re-edit.
One very interesting thing I just discovered that may be affecting my colour; every tutorial I've seen says to use linear fit on your R,G,B subs, but then when I use PCC, everything is red biased. If I don't linear fit, PCC gives me better colour.
One very interesting thing I just discovered that may be affecting my colour; every tutorial I've seen says to use linear fit on your R,G,B subs, but then when I use PCC, everything is red biased. If I don't linear fit, PCC gives me better colour.
Adam,
You don't need to match the colours with LinearFit if you're going to do some sort of colour calibration. It does help to do background neutralization before running PCC, either with DBE or the BackgroundNeutralization process.
You don't need to match the colours with LinearFit if you're going to do some sort of colour calibration. It does help to do background neutralization before running PCC, either with DBE or the BackgroundNeutralization process.
One very interesting thing I just discovered that may be affecting my colour; every tutorial I've seen says to use linear fit on your R,G,B subs, but then when I use PCC, everything is red biased. If I don't linear fit, PCC gives me better colour.
Is linear fit necessary? I've read that an unlinked screen transfer function works just as well. I'd be interested to know what the PI gurus think.