From the course: Photoshop CS5 One-on-One: Advanced

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How the Auto commands work

How the Auto commands work - Photoshop Tutorial

From the course: Photoshop CS5 One-on-One: Advanced

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How the Auto commands work

In this exercise, we are going to see and compare the effects of each of the three Auto commands. Notice that I have opened Father of our money.psd. I also have opened the Histogram panel and I have Source set to Selected layer, so that we are seeing the histograms for a single layer at a time. Now, we are going to start with the Auto Tone, so I have selected the auto tone layer here inside the Layers panel, that's the top-right fragment of money inside of the composition. What the Auto Tone command does incidentally, is it goes and reads the histogram for each channel and modifies it independently. It goes and stretches the histogram, across the entire width of the graph here, which enhances the contrast and absolutely annihilates the Color Caste as we are about to see. Now, the caste that's associated with this money happens to be indigenous, in other words, it wasn't added by the scanner. However, Photoshop doesn't know that and it goes ahead and gets rid of any color caste it…

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