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by garik

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Imagine that there are 50-60 photos from a photosession. Their background color is white, and nearly every photo's background tone and brightness differs from each other. I want to equalize and get one tone and brightness for all backgrounds of photos.

Is that possible? Any suggestions?

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I know this doesn't help for your current problem, but in the future, set everything to manual and you won't have to worry about this. –  Eric May 10 '12 at 21:10

1 Answer 1

It depends how different your backgrounds are and how well they respond to equalization. Here, I've picked a background where I know what color it should be: white.

enter image description here

Then, I created a curves adjustment layer, pointed the white-point eyedropper at the location that should be white, and clicked.

enter image description here (Excuse the terrible circle and arrow art)

This image didn't respond badly to the change, but if you don't have an absolute, you may need to open up the info panel, note the settings at a given location, and then for each succeeding image, tweak until you get the same readings. If you note that the tweaks are very similar for each image, then save the curve and load it into each successive file and edit to taste.

By the way, doing this adjustment in Adobe Camera RAW may produce better results if you are shooting RAW simply because you are working with more data and the decision to change the luminance is done against more bits, reducing the probability of banding or other nasty artifacts.

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