selmslie Loc: Fernandina Beach, FL, USA

How can you say that I misunderstood it if I already made that point in the past. That's not logical.

But I did point out that if the WB is not too far off it can be fixed in the JPEG.

But if you think that using a ColorChecker is going to bring precision to your white balance you are sadly mistaken. Look at the two images below. I used a different white/gray reference for each of them. The RGB values for the selected target are precisely equal. But they are visibly different. The same thing would have happened if you had been working with the raw file for reasons I have already explained.

You are not too good at that as we have already seen. Precision only counts in the studio under controlled lighting. Elsewhere WB only needs to look reasonable and credible.

As I said before, WB is not your forte. You need to move on to another subject.

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Ysarex Loc: St. Louis

Fair enough but then it's also not too logical that you've downloaded that JPEG and are clicking all over it with a white balance dropper making a fool of yourself.

And my only point in this thread is that it can't be fixed "in a snap" -- it will take some effort.
I have never said that in the context of working with RGB images that already have the WB set.

Actually what we have already seen given this topic are hilarious failures on your part over and over again as your nonsense claims resulted in one disaster after another.
https://www.uglyhedgehog.com/t-619877-2.html#10697552
https://www.uglyhedgehog.com/t-597734-18.html#10364890

And now you want to do it again? Awesome!

selmslie Loc: Fernandina Beach, FL, USA

The only one who is making a fool of himself is you.

The eyedropper can be used with a raw image or with a JPEG. It's just as easy to use in either case.

What it does is to alter the overall cast of the image to try and render the spot on which you are clicking as neutral (red=green=blue). It doesn't matter if you are looking at a JPEG that was already saved or the raster image created from a raw file.

The difference is that when you are doing it during the raw conversion it is called White Balance and you have more control over the image. If you are doing it to a JPEG your range is more limited because each color has already been rendered in a 0-255 range. It's harder to make large changes.

So why use a color checker? The WB was set in the image when you clicked the shutter. If it's close, the eyedropper can be used on the raw file if the lighting is not totally screwed up.

But it can also be used on the JPEG if the initial image is not too far off.

You don't even need a color checker. Below I neutralize different parts of the JPEG where I thought it could be rendered neutral. All three of them worked fine but one of them might seem more natural than the others.

So it's not a matter of WB precision. It's an opinion - a matter of taste. But since you have no taste your opinion is worthless.

Precision has nothing to do with it.

I clicked on the white paper on the left

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... the right edge of the newspaper

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... the top edge of the half&half carton

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Ysarex Loc: St. Louis

And that's what I've been saying. Seems you agree and you've done a splendid job of proving me right and proving BigDaddy wrong.

The colorchecker is useful here because it helps verify the severity of your botch job. The bin alone does that but the colorchecker reinforces it. In this case the auto-WB error wasn't severe but it doesn't really take much before you can click yourself silly all around the JPEG and the only way you're really going to get the colors accurate is if you go in there swatch by swatch on the checker and on major objects like the bin and mask them and change them separately. And that's of course assuming you know what to change them to which you probably don't -- not BigDaddy's "snap."

You did great getting neutral white/grey neutral but that didn't bring all the other colors in the image where they should be -- doesn't work the same way when the image has already been white-balanced. This is of course exactly the same screw-up you accomplished previously in these two threads:
https://www.uglyhedgehog.com/t-619877-2.html#10697552
https://www.uglyhedgehog.com/t-597734-18.html#10364890

Maybe you'll learn on the third strike? In the meantime thanks for giving me seven, yahoo seven! more examples to use in class when I teach this topic.

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selmslie Loc: Fernandina Beach, FL, USA

You are still deluding yourself.

What I have proven is that you don’t understand the significance or purpose of WB, only the mechanics.

BigDaddy and I both understand more about WB than you do.