Rank Filter

The Rank Filter replaces pixel values with a specific ranked percentile value identified in the local neighborhood. The Median Filter is a special rank filter which selects the median, or 50th percentile, value. Other special purpose rank filters are the Minimum Filter and Maximum Filter..

The Rank Filter command opens from the Image Window > Process > Filters menu and button on the Main Toolbar. The "immediate" form, shown first, opens when an image or image set is displayed in the top-most window. The general form can be used to select source images from folders, windows, or by matching templates.

Rank Filter Properties

Profile [\|>]	Selects the parameter profile for this command and allows you to save or work with existing presets.
[Select]	Opens the Select Source Images dialog to choose images from an image window, folder, files, name template, or a Mira File List.
Width	Specifies the width of the rank filter neighborhood in terms of pixels along the horizontal (row) direction.
Height	Specifies the height of the rank filter neighborhood in terms of pixels along the vertical (column) direction.
Rank	Specifies the rank percentile to be selected among pixel values in the neighborhood specified by Width and Height.
Source Region	Specifies the rectangular region to be processed. The options are as follows: Entire image: The entire image is processed. Image Cursor: The region to be processed is selected using the Image Cursor. Rectangle: The region specified by Min and Max limits for Column and Row coordinates is processed. Column and Row, Min and Max: When Rectangle is selected, these values specify the column and row limits to be processed.

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