Hi all,
Recently I’ve noticed a problem with my flats not correcting properly and leaving the remnants of the large dust mote on my lights!! It’s only a single dust mote along the top edge but that’s besides the point!!
Now in WBPP I load all the frames required, add relevant keywords (generally *NIGHT* and filter names) then manually link each filter and corresponding flat frame
Execute WBPP everything runs smoothly
Once WBPP has finished and you end back up in the original window, I notice on my light frames in the calibration tab some of the chain links have disappeared in the flats column
Anyone know what’s going on here or is this a potential bug??
When I get to the computer and it happens again I’ll attach screenshots
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Seti Astro has Blur exterminator !!! He has amazing scripts. You can make it go away! I have saved images and you will be amazed.
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I have been having a problem with WBPP correctly identifying the dark and flat masters, I've needed to manually assign them in the calibration tab (and also requires restarts of WBPP as dark and flat masters are generated, the next step is not finding the newly created master). Sounds like you are having a similar issue if the linking icon is going away.
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Dan Kohn:
I have been having a problem with WBPP correctly identifying the dark and flat masters, I've needed to manually assign them in the calibration tab (and also requires restarts of WBPP as dark and flat masters are generated, the next step is not finding the newly created master). Sounds like you are having a similar issue if the linking icon is going away. Like I only see the one specific dust mote and it only becomes a pain after background extraction!! Yeah I could use clone stamp (not blurXterminator) to get rid of it but I’d rather not!! It does sound like we have a similar issue, I might run WBPP in two stages and see the results!! 1- no lights, generate master calibration frames and inspect 2- add lights, link master calibration frames, run WBPP
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Since 1.9.3 they did some changes in the keyword handling and automatic linking of master flats and darks. Especially when you define your proper keyword FILTER. It seems to be used internally by some specific logic and seems to collide with a custom keyword FILTER. Give it a different name or rely completely on the internal mechanism on determining the filter from FITS header keywords in the file.
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Sam Badcock:
Hi all,
Recently I’ve noticed a problem with my flats not correcting properly and leaving the remnants of the large dust mote on my lights!! It’s only a single dust mote along the top edge but that’s besides the point!!
Now in WBPP I load all the frames required, add relevant keywords (generally *NIGHT* and filter names) then manually link each filter and corresponding flat frame
Execute WBPP everything runs smoothly
Once WBPP has finished and you end back up in the original window, I notice on my light frames in the calibration tab some of the chain links have disappeared in the flats column
Anyone know what’s going on here or is this a potential bug??
When I get to the computer and it happens again I’ll attach screenshots I had the same problem. Flats were two days old, new flats fixed it.
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Since my last PI upgrade, I'm having the same issue as Dan: WBPP not finding the path to the newly created masters, so requiring restarts with the new masters loaded directly. But this doesn't sound like Sam's problem, as WBPP is running to completion without failure, just not calibrating properly.
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Christoph Nieswand:
Since 1.9.3 they did some changes in the keyword handling and automatic linking of master flats and darks. Especially when you define your proper keyword FILTER. It seems to be used internally by some specific logic and seems to collide with a custom keyword FILTER. Give it a different name or rely completely on the internal mechanism on determining the filter from FITS header keywords in the file. Ahhh that could be the cause!! I’ll look into this and see if there’s a difference between the FILTER naming in the FITS header and Filename
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Tony Barlow:
Sam Badcock:
Hi all,
Recently I’ve noticed a problem with my flats not correcting properly and leaving the remnants of the large dust mote on my lights!! It’s only a single dust mote along the top edge but that’s besides the point!!
Now in WBPP I load all the frames required, add relevant keywords (generally *NIGHT* and filter names) then manually link each filter and corresponding flat frame
Execute WBPP everything runs smoothly
Once WBPP has finished and you end back up in the original window, I notice on my light frames in the calibration tab some of the chain links have disappeared in the flats column
Anyone know what’s going on here or is this a potential bug??
When I get to the computer and it happens again I’ll attach screenshots
I had the same problem. Flats were two days old, new flats fixed it. Stacking multiple nights and the flats were taken straight away at the end of the imaging session so I don’t think that’s the case
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Rick Schneider:
Since my last PI upgrade, I'm having the same issue as Dan: WBPP not finding the path to the newly created masters, so requiring restarts with the new masters loaded directly. But this doesn't sound like Sam's problem, as WBPP is running to completion without failure, just not calibrating properly. What if …. Hear me out ….. it’s the same problem or atleast similar BUT WBPP doesn’t always throw and error??
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Sam Badcock:
Rick Schneider:
Since my last PI upgrade, I'm having the same issue as Dan: WBPP not finding the path to the newly created masters, so requiring restarts with the new masters loaded directly. But this doesn't sound like Sam's problem, as WBPP is running to completion without failure, just not calibrating properly.
What if …. Hear me out ….. it’s the same problem or atleast similar BUT WBPP doesn’t always throw and error?? Could be - easy to check - just load WBPP with your already created calibration masters and run again, and see if it fixes your problem
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Rick Schneider:
Sam Badcock:
Rick Schneider:
Since my last PI upgrade, I'm having the same issue as Dan: WBPP not finding the path to the newly created masters, so requiring restarts with the new masters loaded directly. But this doesn't sound like Sam's problem, as WBPP is running to completion without failure, just not calibrating properly.
What if …. Hear me out ….. it’s the same problem or atleast similar BUT WBPP doesn’t always throw and error??
Could be - easy to check - just load WBPP with your already created calibration masters and run again, and see if it fixes your problem As mentioned above I’ll give it a whirl in two stages
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Have you tried different exposure levels for your flats? I find I need lower exposures for flats when using a tri-band filter for instance. I also find auto exposures for flats with ASIAIRs are far too bright.
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Terry Doran:
Have you tried different exposure levels for your flats? I find I need lower exposures for flats when using a tri-band filter for instance. I also find auto exposures for flats with ASIAIRs are far too bright. Yeah my exposure times do vary for all my flats!!
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Hi, I am not an expert yet ;-) but what I had was remnants of donuts in my master light after WBPP that disappeared when I decided to have new flats for each imaging session. Even the slighest rotation of your imaging system or a slight move in focus will change the correspondance of previous flats with subframes and it will be more sensitive depending on the focal length. At least it was my problem. IMHO, If you are using previous flats even close in time this would be my first track to follow.
CS Frédéric
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Im having the same issues. It seems calibrated images are not flat corrected. Do you think the new version of PI requires Flats every session? In the past I would reuse flats for many sessions where the general perameters were the same. So, if I have good flats whatsoever the best way to add the files? In the past I simply use the ADD Flts in WBPP. Are you suggesting I should ADD Custom and select the flats there? Sorry Im confused, but my Flats are not being calibrating into the final light frames as they once were. Very frustrated..
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From GROK: Summary - New Flats Per Session?: Not required if your ASI2600MM Pro setup is stable (no optical changes, clean filters/sensor). Reuse master flats for weeks or months, but capture new flats if you adjust the rig, notice dust, or change filters.
- Verification: Test reused flats by checking calibrated lights for artifacts. If issues arise, take new flats (20–50 per filter, ~25,000 ADU).
- WBPP: Load master flats or new flats in WBPP, match with bias or flat darks, and verify calibration links.
If you have specific setup details (e.g., filter changes, dust issues, or flat exposure times), or encounter WBPP errors, provide them, and I’ll refine the guidance. For further help, consult the PixInsight Forum or ZWO’s ASI2600MM Pro documentation. Version 1.9 Lockhart Notes - Stability: Update to 1.9.3 for WBPP bug fixes (e.g., alignment, calibration issues). Check via Resources > Updates.
- Metadata: Ensure flats and lights have consistent FITS headers (FILTER, EXPTIME, GAIN, OFFSET) to avoid grouping errors in WBPP’s XISF-based metadata handling.
- Performance: 1.9.3’s thread optimization speeds up flat calibration but doesn’t affect flat frequency requirements.
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Jeff Bennett:
From GROK:
Summary
- New Flats Per Session?: Not required if your ASI2600MM Pro setup is stable (no optical changes, clean filters/sensor). Reuse master flats for weeks or months, but capture new flats if you adjust the rig, notice dust, or change filters.
- Verification: Test reused flats by checking calibrated lights for artifacts. If issues arise, take new flats (20–50 per filter, ~25,000 ADU).
- WBPP: Load master flats or new flats in WBPP, match with bias or flat darks, and verify calibration links.
If you have specific setup details (e.g., filter changes, dust issues, or flat exposure times), or encounter WBPP errors, provide them, and I’ll refine the guidance. For further help, consult the PixInsight Forum or ZWO’s ASI2600MM Pro documentation.
Version 1.9 Lockhart Notes
- Stability: Update to 1.9.3 for WBPP bug fixes (e.g., alignment, calibration issues). Check via Resources > Updates.
- Metadata: Ensure flats and lights have consistent FITS headers (FILTER, EXPTIME, GAIN, OFFSET) to avoid grouping errors in WBPP’s XISF-based metadata handling.
- Performance: 1.9.3’s thread optimization speeds up flat calibration but doesn’t affect flat frequency requirements.
In my opinion people rely on AI opinions too much I believe you should be shooting that’s every session regardless
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Yes, you are likely right. I have my gear permanently installed in my observatory, so the only changes each night are temperature and focus fluctuations. Ive decided to try adding flats to each session, using the same file name perameters and see how it goes. But I still think there's an issue in pixinsight since I upgraded to the new Lockhart version.
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My cameras get rotated for composition on almost every target I capture so always just take new flats. Sometimes I won’t if I’m shooting the same target over multiple nights close together, but I’ve even been burned a couple of times doing that. Unfortunately dust never sleeps.
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Do it the old way, I calibrate my files manually and use WBPP oly for normalisation and stacking. You have more control what you do and you see if something is wrong after a few calibration. Putting your flatdarks in your bias can help with issues whet not correcting flats on your frames.
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Vandewattyne:
Do it the old way, I calibrate my files manually and use WBPP oly for normalisation and stacking. You have more control what you do and you see if something is wrong after a few calibration. Putting your flatdarks in your bias can help with issues whet not correcting flats on your frames. I was going to do a manual stack tonight but it’s way past my bedtime and I’m still on here so will do that another time haha Ahh okay, I’ll give the flat darks in bias trick a go as well I did manage to have a look at the master flats of my recent project and the dust mote in question is visible in each one so it should’ve been corrected out but the master light shows that dust mote
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I have this same issue too. Once you load 150 frames I think, WBPP switches to 'Automatic integration mode' under Lights > Image Integration. You also want to ensure 'Fast Integration' is unchecked under Post-Calibration. I was loading 1,000 images from 5 nights and thought that was surely my issue. Someone else had posted on their forums recently and the same suggestion was made. But… still no luck. I also do multiple nights by keyword like you do too with no issues in the past.
The interesting part is if I just do calibration in WBPP (load all lights, dark, bias, flat and uncheck everything under Lights except 'Subframe Weighting'), then manually run Star Alignment against the calibrated images, then Local Normalization, and optionally Image Integration, then everything works fine! I'm not fully convinced WBPP is bug-free at the moment. I've also stacked the same data fine in APP and Siril.
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Create your calibrated master_flat and your Master_dark and run your lights through image calibration and cosmetic correction followed by a quick blink through the calibrated lights to see if the dust mote has been addressed. WBPP isn't really needed for this.
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