provide code for diamond filter with value 3 using dilation

f=imread('gee.jpg');
se=strel(0 1 0, 0 1 0, 1 0 1);
b=imdilate(f,se);
imshow(b);

Answer 1

[Guillaume]

Not sure what your question is. If your question is about the usage of strel, why don't you read the documentation? If you want a 3x3 diamond:

se = strel('diamond', 1); %1 is (width - 1)/ 2, with width = 3