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Histograms are something that most new photographers have seen on their camera or in post processing software but many don’t really understand them.
The dictionary defines histograms as:
A bar graph of a frequency distribution in which the widths of the bars are proportional to the classes into which the variable has been divided and the heights of the bars are proportional to the class frequencies.
We’ve included some useful reading on histograms from our archives below but first here’s a helpful little histogram cheat sheet from Digital Camera World that shows 4 histogram types that can be worth knowing.