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Can anyone help me deal with the weird artifact at the comet core? Shows up immediately after stacking, probably due to the comet drifting throughout the frame during imaging. How do people deal with this?  |
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Hello, what program do you use for stacking? Is that a color image or was it mono and an RGB composition.
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1.43
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Marc-Antonio Fischer: Hi thanks, this is a color image with ASI2600MC Pro, used WBPP in PixInsight for pre-processing including stacking. |
8.11
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For comet imaging you have to align and stack based on the comet, not the stars. I can do this in Siril but I have no idea what the procedure would be in PI.
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Tony Gondola: I am familiar with Siril I can do it there...is there a youtube video or something that walks one through this? Or an article somewhere? THanks! |
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2.11
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I got the same result as you did, I also stacked in WBPP. What I then did was use this image as my 'star-stack' by using StarXTerminator to remove the comet and generate a stars-only image, it also required a little bit of the clone-stamp tool to fully remove it. Then I went through the calibrated lights (that WBPP generates as part of its script, should be in your designated output folder) and ran these through the image registration script using the stars image as a reference. After the calibrated comet images were registered, I ran these new registered images through NoiseXTerminator (using the batch process option [side note, this didn't work for me and introduced a weird tiling effect so I had to go through each sub manually with NoiseXTerminator]) and these were ran through the comet alignment tool and then ultimately through the image integration script. At this point I ran StarXTerminator on this integrated and registered comet stacked image and went through the usual process of stretching and then boosting contrast/saturation with curves. Then you can crop both the stars and comet image to the same size/ratio and then add them both together using PixelMath. VisibleDark has a great tutorial on this. Quite a lot to do and consider, I question if my total 15 mins exposure was worth it! |
3.01
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PixInsight has a comet alignment tool that you can use after stacking. This should get you started: https://youtu.be/Zs4XrUrMevM?si=lFNwVg02SOKm_LF8 |
