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# interfaces.slicer.filtering.thresholdscalarvolume

## ThresholdScalarVolume

Link to code

Wraps command **ThresholdScalarVolume **

title: Threshold Scalar Volume

category: Filtering

description: <p>Threshold an image.</p><p>Set image values to a user-specified outside value if they are below, above, or between simple threshold values.</p><p>ThresholdAbove: The values greater than or equal to the threshold value are set to OutsideValue.</p><p>ThresholdBelow: The values less than or equal to the threshold value are set to OutsideValue.</p><p>ThresholdOutside: The values outside the range Lower-Upper are set to OutsideValue.</p><p>Although all image types are supported on input, only signed types are produced.</p><p>

version: 0.1.0.$Revision: 2104 $(alpha)

documentation-url: http://wiki.slicer.org/slicerWiki/index.php/Documentation/4.1/Modules/Threshold

contributor: Nicole Aucoin (SPL, BWH), Ron Kikinis (SPL, BWH)

acknowledgements: This work is part of the National Alliance for Medical Image Computing (NAMIC), funded by the National Institutes of Health through the NIH Roadmap for Medical Research, Grant U54 EB005149.

Inputs:

    [Mandatory]
    terminal_output: ('stream' or 'allatonce' or 'file' or 'none')
            Control terminal output: `stream` - displays to terminal
            immediately, `allatonce` - waits till command is finished to display
            output, `file` - writes output to file, `none` - output is ignored

    [Optional]
    InputVolume: (an existing file name)
            Input volume
            flag: %s, position: -2
    OutputVolume: (a boolean or a file name)
            Thresholded input volume
            flag: %s, position: -1
    args: (a string)
            Additional parameters to the command
            flag: %s
    environ: (a dictionary with keys which are a value of type 'str' and
             with values which are a value of type 'str', nipype default value:
             {})
            Environment variables
    ignore_exception: (a boolean, nipype default value: False)
            Print an error message instead of throwing an exception in case the
            interface fails to run
    lower: (an integer)
            Lower threshold value
            flag: --lower %d
    outsidevalue: (an integer)
            Set the voxels to this value if they fall outside the threshold
            range
            flag: --outsidevalue %d
    threshold: (an integer)
            Threshold value
            flag: --threshold %d
    thresholdtype: ('Below' or 'Above' or 'Outside')
            What kind of threshold to perform. If Outside is selected, uses
            Upper and Lower values. If Below is selected, uses the
            ThresholdValue, if Above is selected, uses the ThresholdValue.
            flag: --thresholdtype %s
    upper: (an integer)
            Upper threshold value
            flag: --upper %d

Outputs:

    OutputVolume: (an existing file name)
            Thresholded input volume