[HDR-photo] Multiple white balances in HDR imagery

[Jeremy Pronk]

Hi John,

This "problem" cannot be fully solved with white balance alone. WB is a 
simple global operator but the effects you describe are localized 
lighting differences. You could trade off and choose and WB setting half 
way otherwise you will need to invoke more advanced colour correction 
and possibly matting techniques. Maybe you could capture a HDR without 
the incandescent light and then tone map to get a good looking image 
using only the exterior light, obviously this wont work in all situations :)

good luck,
J

John Lloyd wrote:
>
>  
>
> Dear HDR group,
>
> I use HDR techniques for capturing real estate imagery. One particular 
> challenge that I run into is adjusting for multiple white balances. 
> For example, lets say I am photographing a room that has several 
> exterior windows. Using ExpoDisc I create a WB preset based on the 
> incandescent lighting in the room and then capture my series of 
> images. When assembling the final image using Photomatix Pro, I find 
> that the cooler daylight that floods the room through the windows has 
> a blue color cast, not only in the windows, but also in highlights 
> /reflections within the room that are caused by the daylight. I wonder 
> if members of the group have suggestions to help me to balance the two 
> distinct white balances. Thanks. John
>
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