De-Bayering for extreme low light

[Uli Plank]

We did further tests on this subject, and I can now state clearly that it helps to do a full de-bayering if you are shooting under low light conditions with extended exposure. We observed erraneous white pixels if doing a half de-bayering which completely disappeared after a full de-bayering.

This is completely independent of a new black shading, which helps a bit for long time exposure but can't work wonders. The white pixels effect is not influenced by this.

 

[Hans-Georg Daun]

Uli,

Are there any simple rules for determining when you need a full debayer ?
Have you seen white pixels with "normal" shutter speeds (48-50-60/s) ?

Thanks for your work
Hans

 

[Antoine Fabi]

Hi Nomad,

In RedCine, what is the control name for full debayer ?

I must admit that i never had image problem though.

thanks

Antoine

 

[Uli Plank]

In REDCine it's "Process: Full".

No, there's no simple rule, but I'm quite happy with Half (High) from RR for most things HDTV if the scene was well lit. I've never seen such white pixels with standard exposure.

 

[Gunleik Groven]

Full de-bayer is always a nice option...

 

[Steve Freebairn]

you can get away with a 1/2 debayer like has been suggested, but unless your going to 720p, you'll probably want to process full, there is a visual difference.

 

[David Wilson]

Thank you Nomad, hot pixels as long exposure times have been a problem for us. Appreciate you input very much.

David