| bwborder - border detection for binary images |
B = bwborder(Img) B = bwborder(Img, 4) B = bwborder(Img, 8) |
| Img |
| binary array, 1 for object and 0 for background (double precision) |
| B |
| binary(0-1) array (double), same size as Img |
| 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). |
initial_dir = PWD;
chdir (SIPDIR + 'images');
Img = imread('bin2.pbm')
xbasc()
imshow(Img,2);
B = bwborder(Img)
imshow(B,2);
chdir(initial_dir);
|
| Images are stored in double precision matrices. Hopefully, the next release will make usage of integer types. |
| Ricardo Fabbri <rfabbri@if.sc.usp.br> |
| The latest version of the Scilab Image Processing toolbox can be found at |
| http://siptoolbox.sourceforge.net |
| edge, follow, im2bw |