binary mask

Good evening,

To obtain an optimal discrimination capability between two peaks from a correlation operation between a stage and a target, I apply a bit mask that blocks certain frequencies,

I wonder because I have no idea, how to mask and on what basis?

Thank you in advance

[Walter Roberson]

Please clarify the difference between this question and your earlier one, http://www.mathworks.com/matlabcentral/answers/6479-classification-of-a-matrix-and-binary-mask

Answer 1

[Voss]

A = magic(5)

A = 5×5

17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9

mask = logical(1-eye(5))

mask = 5×5 logical array
   0   1   1   1   1
   1   0   1   1   1
   1   1   0   1   1
   1   1   1   0   1
   1   1   1   1   0

A(~mask) = NaN

A = 5×5

NaN 24 1 8 15 23 NaN 7 14 16 4 6 NaN 20 22 10 12 19 NaN 3 11 18 25 2 NaN