skel_ACK3a.c File Reference

parallel 3D binary curvilinear, asymetric skeleton based on thin 1D isthmus More...

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Detailed Description

parallel 3D binary curvilinear, asymetric skeleton based on thin 1D isthmus

Usage: skel_ACK3a in.pgm nsteps [ndel [inhibit]] out.pgm

Description: Parallel 3D binary thinning or curvilinear, asymetric skeleton based on thin 1D isthmus. The parameter nsteps gives, if positive, the number of parallel thinning steps to be processed. If the value given for nsteps equals -1, the thinning is continued until stability.

During the first ndel steps (default value 0), detected curve points are marked: they are indicated by a value 127 (instead of 255) in the output image.

If the parameter inhibit is given and is a binary image name, then the points of this image will be left unchanged.

Warning:

When ndel is not set to 0, the output image may contain points with value 127.

The object must not have any point on the frame of the image.

Types supported: byte 3d

Category: topobin

Author:

Michel Couprie