Can someone explain why I am getting the following error in my code?
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function [g]=EdgeDetector_procedure(f)
[M,N]=size(f);
g=f;
m = 3;
n = 3;
a0 = (m-1)/2;
b0 = (n-1)/2;
for y = b0+1 : N-b0;
for x = a0+1 : M-a0;
sum1 = 0;
for k=-b0:b0;
for j=-a0:a0;
if ( f(x,y) == f (x+j,y+k) )
sum1=sum1+1;
end;
end;
end;
p=sum1/9;
H=-plog(p);
d=log(1/9);
if(H<-d/9)
g(x,y)=0;
else
g(x,y)=1;
end;
end;
end;
?? Undefined function or method 'plog' for input arguments of type 'double'.
Error in ==> EdgeDetector_procedure at 20 H=-plog(p);
1 commentaire
Daniel Shub
le 29 Avr 2013
You get the error because MATLAB you use plog, but MATLAB doesn't know what it is.
Réponses (1)
Image Analyst
le 29 Avr 2013
Modifié(e) : Image Analyst
le 29 Avr 2013
Try
H = -p .* log(p); % Calculate entropy.
By the way, there is an entropyfilt() entropy filter that you may want to check out.
1 commentaire
Daniel Shub
le 29 Avr 2013
I thought plog(p) was a typo of plot at first, but now I see that it is p.*log(p). Nice catch.
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