15th Feb 2024: Astro Pixel Processor 2.0.0-beta29 released - macOS native File Chooser, macOS CMD-Q fixed, read-only Fits on network fixed and other bug fixes
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When imaging with narrowband filters from a dark sky (and even some broadband filters), I've found that adding a small pedestal of, say, 200 ADU ensures that there's no black clipping after subtracting dark frames (and/or bias frames) from lights. Currently, I'm adding that pedestal by first doing a batch modify and using the "add data" function.
I think it would make it simpler if there was a "Pedestal" or "Offset" box in 2) Calibrate to "Add ____ ADU to light frames before calibrating".
Scott - http://www.astronomersdoitinthedark.com/
Hi Scott,
Yes, I understand your proposal.
I'll add this to my priorities list as part of more serious work on the calibration engine.
https://www.astropixelprocessor.com/community/development-priorities/current-priorities/
It's important that no clipping occurs while calibrating. Currently, this can still happen like you indicate.
Mabula
