Histogram Plot Histogram Plot
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A typical histogram plot is shown at left. This example shows the histogram of 5 images in an image set, over-plotted, with the second image shown in red. The binning and range of the histogram can be set beforehand using the Histogram preferences page of the Mira Preferences dialog (Ctrl+R). |
A histogram plot graphs the frequency distribution of image values. This plots the number of occurrences of values within a range of value, called a "bin". For the histogram plot, Mira samples pixels inside the rectangle defined by the Image Cursor. For luminance data (non RGB), Mira chooses the bin width and number of bins. For RGB data, Mira uses 256 bins.
Adjust the Image Cursor to enclose the sample region.
Use the Plot > Histogram menu command
or click the button.
