I'm getting some purple and green background colors (image below) after running 'Weighted Batch Preprocessing' on my images. I haven't used PixInsight since summer, and I didn't have this issue then. (I'm using a QHY10 OSC camera.) Would somebody please tell me what I'm doing wrong?
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Image Background Color
- Thread starter prestnm
- Start date
It is not unusual to have a strong colour cast in your original image. DBE or ABE followed by colour calibration usually fixes it. I had a quick try at your image with ABE. It went a long way to fixing it, but not much more I could do with a jpeg.
The fact that your background changes from purple into green as you move down the figure suggests to me a strong gradient. What were the imaging conditions? (Moonlight, bright suburban location etc)
The fact that your background changes from purple into green as you move down the figure suggests to me a strong gradient. What were the imaging conditions? (Moonlight, bright suburban location etc)
Thanks, Geoff, I don't normally get a background with color this strong, and I wasn't able to eliminate the color cast in this image through processing. This image was taken from a 4.5 Bortles location with no moon. I didn't change anything (camera, procedure, etc.) from the last time I imaged and didn't have this issue.It is not unusual to have a strong colour cast in your original image. DBE or ABE followed by colour calibration usually fixes it. I had a quick try at your image with ABE. It went a long way to fixing it, but not much more I could do with a jpeg.
The fact that your background changes from purple into green as you move down the figure suggests to me a strong gradient. What were the imaging conditions? (Moonlight, bright suburban location etc)
After doing extensive testing of different Lights, Darks, Flats, and Biases, I discovered the cause of my background issues. It seems that my Master Flat was defective, showing banding when stretched. However, I have no clue how that could have happened. I use a Flat-Man and imaged flats as always.