Changing origin in Structuring element in octave/matlab (image processing)

Question

I am trying to apply morphological operations on image in octave/matlab. I need to use structuring elements for using operations like dialate, erode. The origin of structuring elements is set by default using this:

origin = floor((size(nhood)+1)/2)

reference : http://www.mathworks.in/help/images/ref/strel.html

i need to change this origin to some other element of the structuring element. FYI I am using flat structuring element.

I couldn't find any document for this. Any help is welcome.

Thanks

Answer 1

If I got your question right you can shift the structuring element using translate .

Example from the help page:

se = strel(ones(3))

%// Translate it 2 rows up and 2 columns to the left

se2 = translate(se,[-2 -2])

Giving this:

Is this what you had in mind?