What toolbox need to be installed for using circlular structuring element?

Can some one help as of what toolbox should I have to use for using circular structuring element? Also help with an example for the use of the same.

Answer 1

[Walter Roberson]

Use the "disk" structuring element. http://www.mathworks.com/help/images/ref/strel-class.html

[rcjr15]

Will that work same way as the circle structuring element?

[Walter Roberson]

It is the circle structuring element, in binary form (which is the form required by the operators)

I suggest using N = 0 or N = 6.

Answer 2

[Image Analyst]

I assume you mean for morphology, like imerode(), imclose(), imopen(), imdilate(), etc. For that you need the Image Processing Toolbox.

[Image Analyst]

rcjr15's reply moved from an "Answer" to here:

ya in those morphological operation if I want to use a circular structural element should that require any other toolbox? for. eg. to use strel('circle',radius)??

[Image Analyst]

Then my answer is definitely confirmed - you need the Image Processing Toolbox.

Answer 3

[Ravi Dange]

hello rcjr15.. have you found out the answer for ring or circular structural element? if you have found so... please post that for me too...

[Walter Roberson]

Are you looking for a solid ring or an outline?

If you are looking for an outline, you could do something like,

R = 10;  %radius. Final size will be (2*R-1)x(2*R-1)

%create a disk
t1 = strel('disk', R);

%put a row of 0 around it
t2 = false(2*R+1, 2*R+1);
t2(2:end-1, 2:end-1) = t1.Neighborhood;

%take the outline
t3 = logical(t2 - imerode(t2,strel(ones(3,3))));

%and trim the padding
strel_circ = t3(2:end-1,2:end-1);