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How to read the Histogram. A histogram is a graphical representation of the pixels exposed in your image. The left side of the graph represents the blacks or shadows, the right side represents the highlights or bright areas and the middle section is mid-tones (middle or 18% grey).
The scene: I feel this is important, and something I do not see discussed very much on the topic of exposure and histograms. If you take a night photograph of a building and half of your image is a sky as black as a ravenâs wing at midnight, you should expect to see a large spike on the left edge of your histogram.Conversely, if the sun is in your image, get ready for a right-side spike.ow to read it: The histogram basically shows you the brightness of an image. If you take an image and see the majority of the body of the graph toward the right, this means you have captured a âhigh-keyâ image that may appear overexposed.