``border of binary vol'' - find borders in a binary volume

VFX name:

iBinBordDetect

IMPROMPTU Equivalent:

Binary_border_detection

purpose:

Locate the outer borders of objects in a binary-valued volume.

The border-detection operation is done via the mathematical morphology operation

$$\rm set\_difference\left\{ volume,\ eroded\ volume\right\} \rightarrow volume$$

where volume is the input binary-valued volume. The connectivity selected (parameter ``conectivity'') determines the connectivity property of border points.

input:

An 8-bit binary-valued volume.

output:

An 8-bit binary-valued volume.

parameters:

Default parameters menu is

connectivity = 6

When ``connectivity = 6'', all ``1'' points in the input volume that are 6-connected to a ``0'' (points in the background) are singled out as border points. A similar interpretation applies to the case ``connectivity = 26''.

comments:

See below.

1.

A moderately fast operation, taking slightly longer than an erosion.