two lines skeletonization

Hai, I am trying to get a nice skeleton, plotted as one line. After the use of ‘skel’ of the function bwmorph I get a nicely one pixel line. But drawing a line through these pixels with: [B,L] = bwboundaries(image); for k=1:length(B) b = B{k}; plot(b(:,2),b(:,1),'g','LineWidth',1); end

, I get at some points two lines, showed over here http://dl.dropbox.com/u/13969758/skeleton.tif . Has someone a solution to remove these extra formed lines between two skew pixels?

[Image Analyst]

Why are you using bwboundaries??? The skeleton is already the coordinates of the line location. Call find() on the binary skeleton image if you want a list of (x,y) coordinates, but I wouldn't necessarily to that - it depends on what you want to accomplish by this plotting of the line (again). No need to call bwboundaries at all. So that totally gets rid of your problem.

Answer 1

[priscilla]

just again skeletonization gives the solution.

Answer 2

[Sean de Wolski]

Perhaps you could just change the connectivity for bwboundaries?

Could you please post the (small) matrix that yielded the above result.

[priscilla]

Hai,

With 4 connectivity, you just get points, see over here:

http://dl.dropbox.com/u/13969758/skeleton_2.tif

By making a line between these points again it gives the same result as before (two lines).