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Chapter 3. Using Camera Raw > The Histogram and RGB Readout

The Histogram and RGB Readout

The histogram displays the histograms of the red, green, and blue channels that will be created by the current conversion settings, not the histogram of the raw image (which would look strange since digital cameras capture at linear gamma—all the image data would be scrunched over to the left).

The histogram lets you check for black and white, just like the histograms on the Histogram palette, but it also lets you check for clipping caused by colors you've captured that are outside the gamut of your chosen working space (see Figure 1-5 in Chapter 1, Digital Camera Raw). If you find that the chosen working space is clipping some colors, you can select a larger one—if your color is clipping in ProPhoto RGB, you're probably capturing something other than visible light!


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