Extract Components

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Extracts shapes, i.e. connected regions, from input labelmaps or mask(s) based on the following properties:

Property	Description
Elongation	The ratio of the largest principal moment to the smallest principal moment. Its value is greater or equal to 1.
Equivalent Ellipsoid Diameter	The diameters of the ellipsoid with the same size and ratio of all the axes as the object. The value depends on the image spacing.
Equivalent Spherical Perimeter	The equivalent perimeter of a hypersphere with the same volume as the object. The value depends on the image spacing.
Equivalent Spherical Radius	The radius of a sphere with the same volume as the region.
Feret Diameter	The diameter of the sphere that inclues the region.
Flatness
Number of Pixels	Number of pixels in the region.
Number of Pixels on Border	Number of pixels adjacent to a pixel with value FALSE.
Perimeter
Perimeter on Border
Perimeter on Border Ratio
Physical Size	The volume of the region in physical units.
Principal Axes	The principal axes of the region.
Principal Moments	The principal moments of the region.
Roundness	The roundness of the object.

Inputs

Input

Input.

Type: Mask, Image, List, Required, Single

Outputs

Output

Output.

Type: Mask, Image, List

Settings

Filter By Selection

Select which shape statistic should be used for extracting a connected component from the input.

Values: Elongation, Equivalent Spherical Perimeter, Equivalent Spherical Radius, Feret Diameter, Flatness, Number of Pixels, Number of Pixels on Border, Perimeter, Perimeter on Border, Perimeter on Border Ratio, Physical Size, Roundness

Order By Selection

Order the connected components according to a shape statistic either Ascending (smallest value first) or Descending (largest value first).

Values: Ascending, Descending

Keep num of Components Integer

How many of the connected components to keep from the ordered shape statistic. To keep the largest component in an input, choose “Filter By: Physical Size”, “Order: Physical Size” and “Keep num of Components: 1”.

Connectivity Selection

Set whether the connected components are defined strictly by face connectivity or by face+edge+vertex (full) connectivity.

Values: Face Connectivity, Full Connectivity