![]() It works on extreme WB problem images as well. I personally find the above exercise a bit of a waste, as you can nearly always get a better result doing it by eye. Select the mid tone eye dropper, and click on your colour sampling points.Turn off the 50% grey and Threshold layers, and add a curves layer.Mark that position with the Colour Sampling tool.Add a Threshold adjustment layer (unclipped) and move the slider to the left until you have the last vestiges of black in the image.Add a layer, fill with 50% grey, and set its blend mode to Difference.There is a trick, (actually there are several) ways to find the mid point. You can fine tune it after your first click on the image gets things close, so you can see more clearly what should a neutral midtone. ![]() ![]() Plus 1 for using the middle 'neutral' eye dropper in a curves layer.
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