Name
bwborder — Border detection for binary images
Calling Sequence
B = bwborder(Img)
B = bwborder(Img, 4)
B = bwborder(Img, 8)
Parameters
- Img
-
binary array, 1 for object and 0 for background (double precision)
- B
-
binary(0-1) array (double), same size as
Img
Description
Extracts contours from binary images, by detecting which pixel valued 1 has at least one neighbor valued 0. The second argument is 4 or 8 depending if the detection is to be made in 4- or 8-neighborhood. The final border will be 8-connected if 4-neighbors are used, and 4-connected if 8-neighbors are used.
- bwborder(Img)
-
equals
bwborder(Img, 8).
Examples
initial_dir = PWD;
chdir (SIPDIR + 'images');
Img = imread('bin2.pbm')
xbasc()
imshow(Img,2);
B = bwborder(Img)
imshow(B,2);
chdir(initial_dir);
Authors
| Ricardo Fabbri <ricardofabbri[at]users.sf.net> |
Availability
The latest version of SIP can be found at
http://siptoolbox.sf.net