MATLAB Answers

1

i was writing a code for mathematical morphology dilation operation for a 1D signal but did not get proper output. Kindly help me with the proper code

Asked by pavan sunder on 6 Oct 2016
Latest activity Answered by M E
on 13 Jul 2019
the code i wrote:
function y_dil=dilation(x,se)
L=length(se)
x=[zeros(1,L) x];
N=length(x)
k=1+L;
y_dil=zeros(1,N);
for n=k:N
for i=1:L
r(i)=max(x(n-i)+se(i))
end
Y_dil(k-L)=max(r);
k=k+1;
end
end

  0 Comments

Sign in to comment.

2 Answers

Answer by Massimo Zanetti on 6 Oct 2016

Use imdilate function which is already in Matlab. https://it.mathworks.com/help/images/ref/imdilate.html
For example, if your signal is SIGNAL matrix (1xN matrix), and your structuring element is SE=[1,1,1], try this:
DIL_SIGNAL = imdilate(SIGNAL,SE)

  4 Comments

Show 1 older comment
Mmm, it should work. See my outputs:
S=[1,1,1,0,0,0,0,1,1,1,0,0];
DIL = imdilate(S,[1,1,1]);
%then I get (as expected)
%DIL=[1,1,1,1,0,0,1,1,1,1,1,0]
Try this on your machine and tell if works.

Sign in to comment.


Answer by M E
on 13 Jul 2019

Supporting the solution provided by Massimo, You can make costum length structuring elements:
DIL = imdilate(S,strel('line',Len,0))

  0 Comments

Sign in to comment.