Understanding Histograms by Example

As you might expect, the histogram on an underexposed image shows precisely the opposite.

Adobe Photoshop Tutorial - Understanding Histograms by Example - Fig. 3

Our whites and lighter mid-tones are non-existent and there’s a heavy bias toward the left hand side of the histogram. This is right in line with what we see when we look at the image-a lot of dark tones and blacks, but no bright, vibrant colors or whites.

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