v3vec − converts a 3D binary line image to 3D vectors

v3vec if=infile of=ofile [-sm] [ws=<value>] [-v]

V3vec computes all operations on an unsigned char image sequence or 3D image. The result is a V3D graph file of lines with a new ID for each line segment. The program is implemented as follows. First, the data is traversed and three-dimensional endpoints and junctions are identified. A three-dimensional endpoint is identified if it has less than 2 26-neighbors and a junction is identified if is has more than 2 26-neighbors. Two passes are performed through the data. In the first pass, segments are started at 3D endpoints and during the second pass segments are started at 3D junctions. A segment is terminated if either a junction or endpoint is reached.

Only unsigned byte images are accepted for input. For each pixel zero is considered to be "false" and any other value is considered to be "true".

if=<value>

3D image or image sequence.

of=<value>

V3D graph file containing the grouped line segments.

-sm

Flag to smooth vectors.

ws=<value>

Window size for smoothing when the ’-sm’ option is used. The default window size is <ws=5>.

-v

Verbose flag

Trina D. Russ

v3thin(1), v3prune(1)