phomotopicskeletonization

Computes the homotopic skeleton of 3D objects.

Synopsis

phomotopicskeletonization connexity [-m mask] [im_in|-] [im_out|-]

Description

phomotopicskeletonization computes the skeleton of the binary objects in the 3D image im_in. Binary objects are regions with connected non null pixels.

The algorithm rests on a sequential suppression of the simple points. A simple points is a point whose suppression preserves the topology of the image.

Parameters

connexity specifies the number of neighbors for a pixel: 6 or 26.

Inputs

im_in: a 3D Uchar grayscale image.

Outputs

im_out: a 3D Uchar grayscale image.

Result

Returns SUCCESS or FAILURE.

Examples

Build the homotopic skeleton of a parallelepiped (it will be reduced to a point):

   pshapedesign 256 256 128 13 120 80 a.pan
   phomotopicskeletonization 26 a.pan out.pan

C++ prototype

Errc PHomotopicSkeletonization( const Img2duc &im_in, Img2duc &im_out, int connexity );

Author: Sébastien Fourey