WBPP Stacking generates Black and White result from OSC Light frames

4 replies•70 views
Aloke Palsikar avatar

Have faced a peculiar issue during WBPP Stacking in Pixinsight for two sets of of light frames . Others seem to work fine

I have a OSC ASI 533 MC Pro along with Askar SQA 55 and my recent exposures of M42 and NGC 1499 have generated a black and white result after stacking the frames through WBPP in PI. The same Light frames have stacked correctly in Siril and the result is a proper color image.

I have checked up all the settings in WBPP including CFA and Debayer options in Calibration and Post Calibration tabs and these settings seem to be fine. The same settings give proper result when I stack my Light frames from other objects

Is there something missing . Any suggestions welcome

Helpful Engaging
Craig Towell avatar

I think there is a CFA checkbox on the lights tab too, is that checked? Have you tried both setting the bayer pattern to auto, and also setting it to the correct pattern?

Helpful
Aloke Palsikar avatar

Have checked the settings and all the above as you indicated are in place. Not sure what is the issue. Plan to check the Light Frames individually to see if any bad frame is causing this issue. Thanks anyway for the response

Craig Towell avatar

Have you had a look through the WBPP log file that is produced at the end of the stacking process? It should state what is happening and if the debayering was attempted or not

Well Written Helpful Concise Engaging
andrea tasselli avatar
No WBPP, no cry… (to paraphrase…)
Related discussions
WBPP experiencing "Unknown exception" errors during "Measurements"
I have been having issues with Pixinsight WBPP failing to measure a significant number of sub-exposures during the Measurements step with the reason as “Unknown exception. I have posted this issue to the PI forum and this time been told to use FBPP b...
WBPP troubleshooting; may help diagnose measurement or processing issues.
Sep 28, 2025
Latest WBPP Results with ASI2600 MCP (Celestron 9.25" Edge HD) seem to Indicate a Problem - What am I doing wrong?
Hello- I am imaging at F10 with Celestron 9.25" Edge HD, ASI2600 MCP and EQ6 R Pro mount with Celestron OAG from Bortle 4-5 skies. I use ASIAir Plus, a camera gain of 100 and BIN 3 normally with this set up. Previously I had no issues with the a...
WBPP stacking problems with calibration frames causing image quality issues.
May 31, 2025
Flats adding to images instead of subtracting in PixInsight WBPP
Astro Friends, I have been imaging for about 5 years and have been successful using refractors and mono imaging. I have branched out this year and now have an SCT and mono setup. I am seeking help with my flats which seem to add themselves to my imag...
Directly relevant; addresses WBPP calibration problems affecting color output.
Jan 2, 2026
Comet Lemmon Data Up for Review – Banding / Pixelation Issue
I’m returning to DSO astrophotography after nearly eight years away, and needless to say, my PixInsight skills needed quite a bit of refreshing. I’m using the same setup as before, but I’ve switched to a Sony A7 IV DSLR for imaging because of its ver...
Author uses PixInsight for processing; candidate addresses WBPP stacking issues in PixInsight.
Oct 14, 2025
Flats undercorrecting vignetting
Hello all! I'm facing issues trying to calibrate my light frames with flats, they seem to be undercorrecting the vignetting on the frame: The equipment I'm using is the following: - Modificated Sky-Watcher Quattro 250P OTA - Sharpstar 1x GPU ...
Related to calibration issues; vignetting problems could affect stacking results.
Aug 6, 2025