What does ~= means in image segmentation??

Hello...

What does this error means? How to resolve it?? Please help this is related to MRF segmentation

Error message:

Subscripted assignment dimension mismatch.
Error in EnergyOfLabelField 
    E(:,i)=sum(Nei8~=i,2);

I don't know how to resolve it....Please help me and solve this issue.. I am attaching my code too so that you can check. Please reply asap.

[Stephen23]

https://www.mathworks.com/help/matlab/matlab_prog/array-comparison-with-relational-operators.html

Answer 1

[Image Analyst]

~ means "not", so "Nei8~=i" means "Nei8 not equal to i".

[begginer01]

how can i resolve..do u want to give an idea about that? what type of value should i use?

[Walter Roberson]

The code

E=zeros(n,class_number);
for i=1:class_number
    E(:,i)=sum(Nei8~=i,2);
end

assumes that the result of sum(Nei8~=i,2) is a vector of length n. That would happen if Nei8 is a column vector of length n rows, or if it is a 2D array with n rows. It would not be the case if Nei8 is a 3 or more dimensional array, and it would not be the case if Nei8 is empty.

You should give the command

dbstop if error

and run your code. When it stops, ask it to display n and to display size(Nei8): if Nei8 is not n x something then you have a problem.

[Image Analyst]

It will throw an error on this line first:

Nei8=imstack2vectors(NeiX(segmentation));

because NeiX was not passed in or defined within the function. Who wrote this weird code for you anyway? Can't you ask the author?