edges colour change in an image

Hey I am trying make the edges in an image more thick I am doing a laplacian filtering and i get white edges with black background and add it to my image how do i change the edges to be black?

Answer 1

[Sean de Wolski]

 I(edges) = 0; %?

Also look at:

 doc imerode
 doc imdilate

[nonyt]

Sorry for late answer :

I was trying the following...

t: image

<768x1024x3 double>

for (i=1:size(t))

if (t[i]==0)

t[i]=1;

end

end

but I have some errors that I cant understand why is not working..

error:Unbalanced or unexpected parenthesis or bracket(in the second line)

Any help?

[Walter Roberson]

for i=1:size(t)

with no () around it.

if t(i)==0

with (i) instead of [i]

t(i)=1

instead of t[i]=1