Rongnongno Loc: FL

Discovered through reading another way to correct a white balance.

Can you post a few samples that I can look at and test?

Thank you.

Bob Yankle Loc: Burlington, NC

Sure, here's one to play with.

(Download)

R.G. Loc: Scotland

You could always use an editor to shift the white balance in a way that suits your planned tests, then try your new technique to correct the images. And if you threw in a bit of extra noise, you'd be in your element :-) .

Rongnongno Loc: FL

And you introduce an element that is correctable.

Rongnongno Loc: FL

There is no WB problem here a bit of brightness and contrast, that's it.

DirtFarmer Loc: Escaped from the NYC area, back to MA

I agree it needs brightness and contrast, but I put it into Lightroom and used the WB eyedropper on one of the cards (bottom of image, at center). There was a shift in temperature and tint.

LR adjusts WB by looking at the R,G,and B values and adjusting temperature and tint to make them equal.

Rongnongno Loc: FL

Look at the original histogram...

There is true white in there that is not over exposed.

wowbmw Loc: Grant, Colorado

Hope these work for your project

Rongnongno Loc: FL

Original?

selmslie Loc: Fernandina Beach, FL, USA

You are not likely to get a satisfactory balance for this image because there are several light sources with different color characteristics shining on different parts of the image. To make matters worse, much of the light appears to be fluorescent, which is a discontinuous source.

Here is an adjusted version based on the assumption that the tiles are black and white checkerboard. I used the white tile in the lower right and the eyedropper in PSE. It took only one click.

There are several other places in the image where you are safe to assume that there is a pure white or gray color that could be used. For example, the "US" in the upper right or the background of the sign in the upper left. Maybe the vanity plate is supposed to have a white background. The vehicle itself is probably black and white but the light color varies all over it. If you base your white balance on any of them you will see the color shift according to the color of light shining on them.


To adjust the white balance you do not need the original. The thumb-nail is good enough for illustration purposes.

wowbmw Loc: Grant, Colorado

The child image was taken with my cell phone. Here is another "original" just converted from Raw to jpeg.

wowbmw Loc: Grant, Colorado

The child image was taken with my cell phone. Here is another "original" just converted from Raw to jpeg. I'll repost the original and check store original on one of the others or find another image that I have not yet white balanced in pp.

(Download)

selmslie Loc: Fernandina Beach, FL, USA

There is a similar problem here. The light is fluorescent (there is a green spike in its discontinuous spectrum) and, although there may be only one color of light source, once the light is reflected around the image after striking large colored objects (like the floor, the walls and the appliances on the right) the overall illumination becomes mixed. You can't even assume that the appliances on the left are pure white.

I tried to balance this one by pointing to the light source itself.

(Download)

wowbmw Loc: Grant, Colorado

Both of your corrections are certainly much better. Thank you. I shared these mostly because the op wanted some images to try out his solution. I have learned from you about the issues associated with this type of lighting. Since I moved around so quickly through this venue, I did not take the time to custom white balance. Think that would have helped. Sometimes there may not be short cuts.

Rongnongno Loc: FL

I am trying different methods.

So far ACR seems to give the more consistent results but that will also depend on your monitor being calibrated... When the other do not

Had to use JPG due to size :(

(Download)