Hi!
I am a new owner of an ASI 294 OSC camera, and with this camera came the interesting challenges of adjusting colors after acquisition. As a detail, I have set the channels all to 0.5 in the driver (I use Ekos/Indi).
After calibration and integration, I typically end up with a blue or yellow image - the R, G and B channels are not properly balanced. Partly caused by the camera, and partly by my flats perhaps not having the preferred white balance (different ways to produce flats clearly affect the resulting color).
I have now tried several ways to balance the colors, and it seems to work quite nicely. I can:
- split into separate channels, do a LinearFit, and recombine them
- use DBE, that effectively removes the color
- use background neutralization, same result
- manually adjust the colors with Histogram Transformation
However, one tool that consistently fails to adjust the color is ColorCalibration. I use a small preview without stars as a background reference and set the whole image as white reference. Then use default settings. But the color remains. See attached image - color not perceptibly affected by the process, only made darker.
Any suggestions warmly welcome for:
- why is not CC adjusting the color? What am I missing?
- which process would be the best for doing this with this camera?
Magnus
I am a new owner of an ASI 294 OSC camera, and with this camera came the interesting challenges of adjusting colors after acquisition. As a detail, I have set the channels all to 0.5 in the driver (I use Ekos/Indi).
After calibration and integration, I typically end up with a blue or yellow image - the R, G and B channels are not properly balanced. Partly caused by the camera, and partly by my flats perhaps not having the preferred white balance (different ways to produce flats clearly affect the resulting color).
I have now tried several ways to balance the colors, and it seems to work quite nicely. I can:
- split into separate channels, do a LinearFit, and recombine them
- use DBE, that effectively removes the color
- use background neutralization, same result
- manually adjust the colors with Histogram Transformation
However, one tool that consistently fails to adjust the color is ColorCalibration. I use a small preview without stars as a background reference and set the whole image as white reference. Then use default settings. But the color remains. See attached image - color not perceptibly affected by the process, only made darker.
Any suggestions warmly welcome for:
- why is not CC adjusting the color? What am I missing?
- which process would be the best for doing this with this camera?
Magnus