Eric Gagne:
Hello,
The short story is, my house location isnt't good for astrophotography, there isn't much I can do from my backyard but on the front and sides of the house where I'd have a better FOV I would have power lines running through most of my shots hence the question in the title.
Would it be possible to remove them in processing ?
Do you have some example frames, preferably sampled from the beginning, middle and end of your imaging sequence?
Power lines wouldn't be static within your frames. Because you would normally be tracking (there might be a few edge cases where you would not), the power lines should actually move from frame to frame. With that movement should come the ability to statistically identify them and eliminate them, at least hopefully. It would depend on how much they move frame to frame. With dithering they should move more and more randomly, which could help eliminate them.
Mainly, if the power lines can be identified within each frame as "outliers" (well beyond some statistical mean) for most of the pixel values across all your frames, then they can be statistically "rejected" as part of image integration. That would be the easiest way to take care of them, if you can.
If they cannot be identified and rejected statistically, then you might have to get more clever with their removal. If they are very out of focus and blurred, then in a sense they could be considered an aspect of the overall LP gradient. PixInsight just received a new type of gradient removal tool, that might be of some use here. Since it identifies and rejects larger-scale factors, a localized gradient caused by some OOF power lines might be identified and eliminated.
