0
$\begingroup$

Should kernel size always be a prime number? E.g. (3,3) (5,5) (7,7).

While tinkering with sklearn.preprocessing.KernelCenterer(), I noticed that I could only get it to work on a 3,3 array not 2,3 not 6,1.

Then I realized that in a square that is prime-by-prime, there is always a center - hence Centerer.

[ ][ ][ ]
[ ][X][ ]
[ ][ ][ ]


[ ][ ][ ][ ][ ]
[ ][ ][ ][ ][ ]
[ ][ ][X][ ][ ]
[ ][ ][ ][ ][ ]
[ ][ ][ ][ ][ ]
$\endgroup$
1
  • $\begingroup$ ha - most low odds are prime. yikes $\endgroup$
    – Kermit
    Commented Jan 11, 2021 at 1:56

1 Answer 1

3
$\begingroup$

Odd numbers, usually, but not necessarily. This can depend on the problem at hand. The odd length of the side of the kernel is used in order to emphasize the center of the kernel. For a more detailed discussion of the geometry of kernels and convnets have a look at this thesis.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.