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Histogram Properties
Histogram Properties control histogram
plots. These properties can be changed globally, to make default
settings for new image windows, or locally, to affect histogram
plots only made from a specific window. The default properties
dialog uses a profile control to save and recall parameter sets for
use by future image windows. Local properties affect only the
specific
Image Window for which they are changed.
 
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Histogram Properties
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Profile [|>]
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Selects the parameter profile for this command and
allows you to save or work with existing presets.
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Bin Properties
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Priority
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Specifies which properties are given priority.
Automatic: Mira
chooses optimal settings for both the bin width and the number of
bins.
Bin Width: You
choose the bin width and Mira calculates the number of bins. There
is one setting for integer type images and another setting for real
type images, as integer type data should not be binned using a
non-integral bin width.
Bin Count: You
choose the number of bins and Mira calculates the bin width.
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Number
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Specify the number of bins when Bin Count priority is selected. Mira calculates
the bin width.
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Bin Width
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Specify the bin width when Bin Width priority is selected. Mira calculates
the number of bins. There is one setting for integer type images
and another setting for real type images, as integer type data
should not be binned using a non-integral bin width.
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Range Properties
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 Use Full Range
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The frequency distribution uses the full range of
values encountered in the sample. The number of bins and the bin
width are applied to the full range.
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Exclude Percentiles
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Upper: This setting
specifies the upper percentile of values to be excluded from the
binning process. For example, 1.0 specifies that the highest 1% of
the values are excluded.
Lower: This setting
specifies the lower percentile of values to be excluded from the
binning process. For example, 0.5 specifies that the lowest 0.5% of
the values are excluded.
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Setting the Histogram Bins
The histogram bin is the "quantum" of the x axis
data in the plot. Each bin spans a range of image value so that
pixels with value anywhere inside the limits of the bin are
assigned to that bin. Their detailed values are lost in the plot.
Choosing the bin width (or range of values) and the number of bins
affects the way the data are displayed. The bin setting is a
priority for generating the frequency distribution, because the
other aspects follows. For example, setting the bin width affects
the number of bins that are needed to span the range of the data.
Conversely, choosing the number of bins controls the width of the
bins. Mira provides 3 choices for setting the histogram bin
priority:
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Histogram Bin Priority Options
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Automatic
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Mira chooses optimal settings for both the bin
width and the number of bins.
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Bin Width
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You choose the bin width and Mira calculates the
number of bins. There is one setting for integer type images and
another setting for real type images, as integer type data should
not be binned using a non-integral bin width.
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Bin Count
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You choose the number of bins and Mira calculates
the bin width.
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Setting the Histogram Range
The histogram range refers to the range of data
values included in the histogram. Mira offers the option to use all
the data or to select a range of upper and lower percentiles to
exclude from the histogram. If the data are "well behaved" then you
might choose to see the full range of data. Otherwise, you can
exclude the extreme values to show more detail in a specific range
of the frequency distribution.
Related Topics
Setting Application Properties
Plotting Commands
Histogram Plot
Tutorial: Creating Plots from Images
Mira Pro x64 User's Guide, Copyright Ⓒ 2023 Mirametrics, Inc. All
Rights Reserved.
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