In photography, a histogram is a chart that depicts how many light and dark pixels are in an image. If the chart peaks towards the left, the image has a lot of dark hues. If the chart peaks to the right, the image has a lot of light hues. If those peaks are cut off at the edges, the image is underexposed (on the left edge) or overexposed (on the right edge). A histogram is something beginners should learn after they have a good understanding of manual modes.« Back to Glossary Index
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