generic non-linear filtering that support selem and boundary handling

[Stéfan van der Walt]

Hi Chencan,

On Mon, May 26, 2014 at 8:50 AM, Chencan QIAN <qianchencan at gmail.com> wrote:
> I guess the absence of such a function must be due to some unresolved
> technical obstacle?

The main obstacle is: how would you specify such a filter?  If you
provide it as a function call, then we have to go through Python (not
Cython), which slows things down back to the speed that ndimage's
generic filter would give you.

Regards
Stéfan