10th Feb 2020 - APP 1.076 beta 3 is available... check the release notes !

APP 1.076 beta 3 download links (Windows, MacOS, Linux RPM&DEB) are here (must be logged in !)

2019 November: Complete LRGB Tutorial of NGC292, The Small Magellanic Cloud by Christian Sasse, Astronomer in Charge of

2019 September: Astro Pixel Processor and celebrate a new Partnership!

Bad Pixel Map  


Molecular Cloud Customer
Joined: 2 years ago
Posts: 3
April 3, 2019 23:12  

I am trying to figure out what files are needed to create a bad pixel map.  In Sara Wager's video she only uses darks and flats.  But when I try doing that I get an error message saying that a Master Flat cannot be created without an appropriate bias frame.  Or something to that effect. 

Certainly the interface has changed since Sara's video.

What is really required?

Also, if I have a OSC camera I assume I need to have the "Force Bayer CFA" box checked in the Raw/FITS settings?




This topic was modified 11 months ago by astrojoe
This topic was modified 11 months ago by Vincent Groenewold - Moderator

Topic Tags
Quasar Admin
Joined: 3 years ago
Posts: 1244
April 4, 2019 10:50  

For a BPM you need Bias and Dark signal (preferably a long dark) and flats to be able to detect cold pixels. I'm not sure if your darks already had bias substracted or that it was changed since the video, but to be safe you can just add the bias separately.

You shouldn't have to use the force option, APP normally sees this automatically.