Tool Name	Connectivity Analysis
Tool ID	14
Library ID	grid_filter
Version	1.0
Author(s)	HfT Stuttgart (c) 2013

Description

Connectivity analysis of a binary input image according to
Burger, W., Burge, M.: Digitale Bildverarbeitung. Springer Verlag 2006, p.208.
Output consists in a symbolic image of the connected foreground regions and a shape of the borders of the foreground regions (outer and inner borders). The shape may contain alternatively the centers or the corners of the border pixels. Optionally, the regions which have contact with the image borders can be removed together with their border shapes.
In addition, an optional morphological filter (erosion-binary reconstruction) can be applied to the input image first.

Parameters

Name	Type	Identifier	Description	Constraints
Input
Input Binary Grid	grid, input	INPUT_GRID	Binary input image for the connectivity analysis
Output
Filtered Image	grid, output, optional	FILTERED_MASK	Morphologically filtered binary mask
Symbolic Image	grid, output	SYMBOLIC_IMAGE	The final symbolic image
Outlines	shapes, output	OUTLINES	Polygon outlines of object regions
Options
Apply Filter?	boolean	FILTER	Apply a filter (erosion - binary reconstruction) to the input image	Default: 1
Filter Size (Radius)	integer number	SIZE	Filter size (radius in grid cells)	Default: 3
Pixel Centers?	boolean	BORDER_PIXEL_CENTERS	Should the output shapes contain the centers of the border pixels instead of the corners?	Default: 0
Remove Border Regions?	boolean	REMOVE_MARGINAL_REGIONS	Remove regions which have contact with (are adjacent to) the image borders?	Default: 0