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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).
You can analyze your data and display it in a histogram (a column chart that displays frequency data) by using the Histogram tool of the Analysis ToolPak in Microsoft Office Excel. To create a histogram, you must organize the data in two columns on the worksheet.These columns must contain input data and bin numbers.nput data is the data that you want to analyze by using the Histogram tool. Bin numbers are the numbers that represent the intervals that you want the Histogram tool to use for measuring the input data in the data analysis. When you use the Histogram tool, Excel counts the number of data points in each data bin.