how to Understand image histograms
Understanding image histograms is probably the single most important
concept to become familiar with when working with pictures from a digital
camera TONES
region where most of the brightness values are present is called
the "tonal range." image is an example which contains a very broad tonal range,
with markers to illustrate where regions in the scene map to
brightness levels on the histogram HIGH AND LOW KEY IMAGES
underexposure is usually more forgiving than
overexposure (although this compromises your
signal to noise ratio). Detail can never be recovered when a region
becomes so overexposed The histogram is a good tool for knowing whether clipping has
occurred since you can readily see when the highlights are pushed CONTRAST
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