Batch White Balance using a reference pixel?

Question

Hi,
I have shot a time lapse image sequence that includes change from day to night & vice versa. The automatic white balance produces unsatisfying results.
Since it's always the same scene, what I would like to do is this: Select one pixel in one of the images and have Lightroom (3.3) use this pixel on each of the images as a reference for white balancing them.
Is this possible?
A solution for Camera Raw or Photoshop (CS5) would also be okay.
Thanks a lot!
Mike

Answer 1

Hi clvrmnky,
hi BDLImagery,
thanks for your replies.
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The dropper will use an average from that selection to choose a neurtal, shifting all colours to match that new neutral. I suspect this is not what you want.
I do have some snow in foreground which imho makes a nice reference for white balancing since I don't want the snow to be blue, pink or whatever I've got at the moment. Same goes for the clouds. So my idea is to use each pic's snow at the same pixel position for white balancing.
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Only way I can think of is to create an Action in Photoshop, tie this action with the Lightroom export function and check the "add to this catalog" in the Export window to import the modified photo back in the catalog.
Thought of something like that, too, but the problem is that applying a white balance after import (which this would be) would already work on corrupted data by the previous in-app (camera raw or lightroom) white balance. I tried it on a pic that comes out of the default white balance as completely blue, and you cant rescue that after import to photoshop since by then the original info is lost.
I think I'll now go something like this:
Select all ~5000 images in camera raw, perform white balance on the first one & propagate to the others, then browse forwards to the first one that does not work with these settings, select from that one to the end & do white-balace on those & repeat until done. And to avoid sharp cut-overs do some more or less smooth transitions on the surrounding images.
Kind regards
Mike