What need to be input for S in ordfilt2?

The coding are as follows:

>> I=imread('sample01.tif');

>> B = ordfilt2(I,1,ones(3,3),[3 3]);

??? Index exceeds matrix dimensions.

Error in ==> ordfilt2>ParseInputs at 132

s = s(find(domain));

Error in ==> ordfilt2 at 51

[A,order,domain,s,padopt,msg] = ParseInputs(varargin{:});

Do i need to input matrix dimension for S? (For references)

How do i know in terms of which parameter and value for ordfilt2 and other image enhancement method works besides the help section?

Answer 1

[Jan]

S must have the same size as the domain, see doc ordfilt2. So when your domain is ones(3,3), S must be a [3 x 3] matrix also.