How to dilate or erode image in Octave

• Make sure the image package for Octave is installed. It can be installed easily:

$ sudo apt-get install octave-image

• First create a structuring element to use for dilation or erosion:

$ se = strel("square", 3);
$ se
1 1 1
1 1 1
1 1 1

• Next, use the structuring element to perform dilation or erosion:

$ B = imdilate(A, se);
$ D = imerode(C, se);

These functions are from Matlab and so will work on it too.

Tried with: Octave 3.8.1 and Ubuntu 14.04