I am trying to figure out if there is a certain color of light I can use to set the white balance on my digital camera so that it will preserve the color casts caused by the current lighting.
The other day I walked into a grove of trees and the lighting was very nice and I wanted to take a picture of that scene. However if I take a white balance, that would remove the attractive color of the light, I wanted to preserve that color. I want the scene I see in the camera display to match what I see with my eyes.
I’d like to bring my pda/pocket pc with me and display a .jpg of a “neutral” color on it to take a white balance from so the camera will preserve the color of the lighting when I take a picture.
As a first step: are there any rgb values such that if I display that color on my calibrated computer monitor and then take a white balance with my digital camera, the camera will take pictures that preserve what ever color casts may be present when a picture is taken?
If I display a test pattern on my computer screen and take a white balance off the white portion of the screen the colors r,g,b,c,m,y look the same to my eyes when I look directly at the computer monitor or look at the camera display with the camera pointing at the computer monitor.
However if I then point the camera around the room, everything looks too yellow. So I add a bit of yellow to the white swatch on the computer screen and take a white balance so that the camera will remove a little yellow from it’s pictures. Then I point the camera around the room and things look similar when I look directly or look through the camera.
However if I point the camera back at the computer monitor it looks too blue - which is exactly what you’d expect, actually, if you take a white balance from a yellowish light.
Can anyone suggest a “neutral” color rgb values or explain why this won’t work?
Are any of the camera presets, ie sunny, cloudy, flash, incandescent, flourescent likely to do this?