Pixinsight problem

[Astroboy239]

When I decided to reprocess my old M42 data in pixinsight instead of dss I got this weird artifacts. Can someone help me out

https://goo.gl/photos/US3D23ZN5idDHUog6

 

These are the images of the screen 

I'm getting that weird dark path in the center a bright ring and again little dark then once again the corners r lit up

I've also calibrated flat frames but it doesn't just work

[Shelster1973]

Do you have a picture of the master flat you are using?

To my eye, with very limited PI experience, it looks like the flat you are using may not be up to the job and also it appears that ABE is not removing the gradients.

Have you tried processing using DBE instead and seeing what result that throws out at you?

[Astroboy239]

Even I am a beginner not tried dbe yet

But my master flat appears to be good

[Shelster1973]

DBE is a very useful tool to use....is also a fairly easy tool to get to grips with too.

Have you had a look at the Light Vortex tutorials in PI use?  That covers use of DBE very well, as does Harry's video tutorials, which you can find here if you do not already have that link

[Scooot]

I'm no expert but have you colour calibrated the preview box 2 rather than the whole image?

also did you do a background neutralisation before the calibration routine?

[Astroboy239]

I did background neutralization. I've tried many other stuff but still no use. 

 

[Astroboy239]

I did background neutralization. I've tried many other stuff but still no use. 

 

[Scooot]

If you get no joy here I'd try asking on the pixinsight forum.

[Astroboy239]

I'll try and see what happens this error is occurring only for this particular set of images

[wimvb]

Some time ago (2016) in this forum, I saw some stunning images where the image after stacking had a pattern similar to what your image shows. That image cleaned up very well.

I believe the trick was to use Pisinsights DBE process several times. Unfortunately I can't find the original post, but it should be under the deep sky imaging sub-forum.

You can always post your image on the Pixinsight forum as a processing challenge.

Good luck

[RSM]

DBE seems to work for me when I get similar issues. I run DBE on the final calibrated, registered and stacked image before any further processing. As I stretch the image to bring out the detail afterDBE, if I start getting too much background gradient coming out I run it again later in the process, usually (not always) works together with a bit of touch up using SCNR if there is a strong colour tone to the background afterwards. Try Harry's Astroshed tutorial on You Tube - last for about 8 minutes and gave me the skills I needed (thanks Harry!). Search for Harry Page, DBE, Pixinsight on Youtube.

[harry page]

Hi

your flats do not appear not to be working well as I can still see a lot of vignetting in your stack

also ABE does not work well when there is a lot of " stuff " about , DBE is what you need

If you can supply the raw stacks for inspection I could have a look

 

Harry

[Astroboy239]

Yes sure

I'll post in a while bad net at the moment 

[Astroboy239]

https://goo.gl/photos/zyfFuPsaeX1Q1JaTA here are the raw files

[wimvb]

Sorry, but all I see in your linked folder is 3 jpeg images. These are not RAW images. Did you have your camera in RAW mode? For Canon the file extension is .CR2 and for Nikon it is .NEF I believe.

[Astroboy239]

I clicked in both jpeg and raw my phone doesn't support raw yet I'll get the raw from the computer ASAP 

[Astroboy239]

I just figured out  the problem it's with the lights idk how but it's really weird to get a dark path in the center. I think I should get my camera checked