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Digital Exposures > Digital Exposures - Pg. 65

Chapter 4 Camera Settings and Digital Exposure 65 Figure 4-1: A histogram is a bar graph that represents all of the different tones of brightness in the image. I manipulated the histogram on the right to pull the bars apart so you can see them better. When you look at the histogram as a bar graph, all of the white or light-toned objects in the image are represented by the bars on the right side of the graph, while the darker tones are represented by the bars on the left of the graph. Each bar represents a level of brightness; the higher the bar, the more pixels there are in the image that share the same level of brightness. As you can see in Figure 4-2, if there are a lot of darker tones in the image, the histogram rises up on the left side; if there are a lot of average tones, the histogram rises in the middle; and if there are a lot of lighter tones, the histogram rises up on the right side.