bwboundaries
Trace region boundaries in binary image
Syntax
Description
traces the
exterior boundaries of objects, as well as boundaries of
holes inside these objects, in the binary image
B
= bwboundaries(BW
)BW
.
bwboundaries
also descends into
the outermost objects (parents) and traces their children
(objects completely enclosed by the parents). The function
returns B
, a cell array of boundary
pixel locations.
Examples
Input Arguments
Output Arguments
Algorithms
The bwboundaries
function implements the Moore-Neighbor tracing algorithm
modified by Jacob's stopping criteria. This function is based on the
boundaries
function presented in the
first edition of Digital Image Processing Using
MATLAB
[1].
References
[1] Gonzalez, R. C., R. E. Woods, and S. L. Eddins, Digital Image Processing Using MATLAB, New Jersey, Pearson Prentice Hall, 2004.
Extended Capabilities
Version History
Introduced before R2006a