Is there any way to set the white balance for a shot with light from two different light temperatures?

To make the photo look like it only has one light temperature?

If you mean can it be fixed in post, yes, it often can. But it depends on the image.

OP   Can you show us a shot of what you mean?

Here is a small part of the image in question, there are actually a batch of these all with the same problem:


I think there are actually 4 temps; sunlight, florescent, and incandescent, and the camera's flash.

Plus there is a lot of blur too.

It was taken with a Canon EOS Rebel T1i, here is the EXIF:

IDF    0
Manufacturer    Canon
Model    Canon EOS REBEL T1i
Orientation    left - bottom
x-Resolution    72.00
y-Resolution    72.00
Resolution Unit    Inch
Date and Time    2012:12:02 17:26:54
Artist   
YCbCr Positioning    co-sited
Copyright    [None] (Photographer) - [None] (Editor)
ThumbnailSize    9446

IDF    1
Compression    JPEG compression
x-Resolution    72.00
y-Resolution    72.00
Resolution Unit    Inch
ThumbnailSize    9446

IDF    EXIF
Exposure Time    1/25 sec.
FNumber    f/1.8
Exposure Program    Creative program (biased toward fast shutter speed)
ISO Speed Ratings    1600
Exif Version    Exif Version 2.21
Date and Time (original)    2012:12:02 17:26:54
Date and Time (digitized)    2012:12:02 17:26:54
Components Configuration    Y Cb Cr -
Shutter speed    4.62 EV (1/24 sec.)
Aperture    1.62 EV (f/1.8)
Exposure Bias    0.00 EV
Metering Mode    Pattern
Flash    Flash did not fire, compulsory flash mode
Focal Length    85.0 mm
Maker Note    7290 bytes undefined data
User Comment   
SubsecTime    97
SubSecTimeOriginal    97
SubSecTimeDigitized    97
FlashPixVersion    FlashPix Version 1.0
Color Space    sRGB
PixelXDimension    4752
PixelYDimension    3168
Focal Plane x-Resolution    5315.44
Focal Plane y-Resolution    5342.33
Focal Plane Resolution Unit    Inch
Custom Rendered    Normal process
Exposure Mode    Auto exposure
White Balance    Auto white balance
Scene Capture Type    Standard
ThumbnailSize    9446

IDF    GPS
GPS tag version    2.2.0.0
ThumbnailSize    9446

IDF    Interoperability
Interoperability Index    R98
Interoperability Version    0100
ThumbnailSize    9446

It would be easier if you had shot in raw... Best thing to do is use a correction gel on the flash and or only use sun/flash and incandescent or florescent but try to stay away from multiple temps in the future. At this point I am not even sure what you could do to fix it without playing with it. Hopefully some of the others here can help get you close... I also shoot with a T1i but can't say I've had this issue yet.

Also, you should go into the software and register your name in the camera so that it stays imbedded with the file as long as the exif data is attached.
Best of luck,

Tom

When using flash and ambient light, use a gel on the flash to match tne ambient....when there are two lightsources you can't adjust, (daylight and artificial light in one shot), you can do a double rawconversion and use masking

I didn't take that shot and it wasn't my camera, I was working with a photographer who was new and part time.

I was just wondering if there were any "filters" or "plugins" (I use GIMP) to automate corrections like multiple light temperatures.

That does sound kind of manual?

I use GIMP and I used a brush with a hue and then a color merge mode to adjust the hue and then color so both sides of the object (the arms) match the same color temp.

Is that the same approach?

Convert to Black and White