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Forums > Digital Art and Retouching > Corrections for two light temps? Search   Reply
Model
Sandra Vixen
Posts: 971
Los Angeles, California, US


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?
Dec 19 12 07:59 pm  Link  Quote 
Retoucher
Peano
Posts: 4,106
Lynchburg, Virginia, US


If you mean can it be fixed in post, yes, it often can. But it depends on the image.
Dec 19 12 09:00 pm  Link  Quote 
Photographer
Innovative Imagery
Posts: 2,815
Los Angeles, California, US


OP   Can you show us a shot of what you mean?
Dec 19 12 09:11 pm  Link  Quote 
Model
Sandra Vixen
Posts: 971
Los Angeles, California, US


Here is a small part of the image in question, there are actually a batch of these all with the same problem:
http://www.fileden.com/files/2012/12/9/3374900/3temps.jpg

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
Dec 19 12 10:16 pm  Link  Quote 
Photographer
Thomas Sellberg
Posts: 140
Bloomington, Illinois, US


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
Dec 19 12 10:56 pm  Link  Quote 
Photographer
richy01
Posts: 153
Amsterdam, Noord-Holland, Netherlands


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
Dec 19 12 11:32 pm  Link  Quote 
Model
Sandra Vixen
Posts: 971
Los Angeles, California, US


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.
Dec 20 12 01:13 am  Link  Quote 
Retoucher
Sofia Zasheva
Posts: 154
Sofia, Sofija grad, Bulgaria


richy01 wrote:
you can do a double rawconversion and use masking

I'd suggest that too. Anyway, there's no easy fix for a problem like that. You can use local adjustments for the white part (acting as back light?), for example and then use adjustment for the whole image to lower the temperature, make it colder.
However, different temperatures can be cool because they can make an image look more natural, give more shape to certain volumes, think about what would happen if you even out everything, may be the problem is just on one part of the picture. Even one of the best photographers I know recommends shooting with slightly different temperatures of all light sources.

Dec 20 12 02:47 am  Link  Quote 
Photographer
Bernard Wolf
Posts: 21
Santa Monica, California, US


Sandra Vixen wrote:
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.

In Adobe Camera RawCS5 or6 or Lightroom 4 with either a raw, tiff or jpg you can use the adjustment brush and selectively brush the proper color tempeture into the areas that need adjusting.

Dec 20 12 01:34 pm  Link  Quote 
Model
Sandra Vixen
Posts: 971
Los Angeles, California, US


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?
Dec 20 12 02:21 pm  Link  Quote 
Photographer
Tahir SOYLU
Posts: 29
İstanbul, İstanbul, Turkey


Convert to Black and White tongue
Dec 20 12 11:51 pm  Link  Quote 
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