Reply To: APP 1.061 released!

Activity Forums Astrosoftware Astro Pixel Processor APP 1.061 released! Reply To: APP 1.061 released!

#19489
KeesScherer
Participant

Hoera en Joechei natuurlijk! Na het lezen van de Lanceer notities vraag ik me af of het verstandig is om alle masters opnieuw te maken. Ik denk dat het antwoord ja is en ik denk ook dat ik een aantal bewerkingen opnieuw ga doen.

Let op! De nieuwe calibratiemethode maakt het noodzakelijk om masters opnieuw te maken, met name Darks! (Dit wordt niet benadrukt in de “Lanceer notities”.) Zie ook de uitleg hier. B.v. deze passage: ”

In APP 1.060 and higher, the Masterbias is never subtracted from the darks if you create the MasterDark. That will ensure no vital calibration data is lost due to black clipping after MasterBias subtraction.

Then when the light frames (or flats) are calibrated, depending on wheter a MasterBias is present, the bias pixel is subtracted from the dark pixel before the dark pixel is subtracted from the light frame pixel (after which the light pixel is divided by the flat pixel). This will ensure that calibration always works as it should whatever masters that you load.

Unfortunately, this does mean that old MasterDarks that have the MasterBias already subtracted are suboptimal and probably less effective in calibration due to the clipped calibration data and need to be replaced if that’s still possible. (and otherwise, create a set of new darks and use APP’s new dark scaling function”

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