MATLAB: How can I use the function on 3*3 blocks

blockprocImage Processing Toolbox

hi I have a matrix ,I wanna use a function on 3*3 blocks. my function is: if in a block we watch just a one this block should return 1 but if all 9 elements of this block is zero this function should return 0 how can I do this in matlab?
…all the elements of this matrix is zero and one.

Best Answer

inputData=zeros(10,10);
inputData(randi(100,[15,1]))=1
inputData =
       0     0     0     0     0     0     0     1     0     0
       0     0     0     0     0     0     0     0     0     0
       0     0     0     0     0     0     0     0     0     0
       1     0     0     0     0     0     0     0     0     1
       1     0     0     0     0     0     0     1     1     0
       0     0     0     0     0     0     1     1     0     0
       0     0     0     0     0     0     0     0     0     0
       0     1     1     0     0     0     1     0     0     0
       0     0     0     0     0     0     0     0     0     0
       1     0     0     1     0     0     0     0     0     0
% this is what you are looking for
result=blockproc(inputData,[3,3],@(block) any(block.data(:)~=0))
result =
       0     0     1     0
       1     0     1     1
       1     0     1     0
       1     1     0     0
% and if you want both inputData and result matrix be the same size do this:
result=blockproc(inputData,[3,3],@(block) any(block.data(:)~=0)*ones(3,3))
result =
       0     0     0     0     0     0     1     1     1     0     0     0
       0     0     0     0     0     0     1     1     1     0     0     0
       0     0     0     0     0     0     1     1     1     0     0     0
       1     1     1     0     0     0     1     1     1     1     1     1
       1     1     1     0     0     0     1     1     1     1     1     1
       1     1     1     0     0     0     1     1     1     1     1     1
       1     1     1     0     0     0     1     1     1     0     0     0
       1     1     1     0     0     0     1     1     1     0     0     0
       1     1     1     0     0     0     1     1     1     0     0     0
       1     1     1     1     1     1     0     0     0     0     0     0
       1     1     1     1     1     1     0     0     0     0     0     0
       1     1     1     1     1     1     0     0     0     0     0     0
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