Thank you, this is a start. I seems that there are more issues to resolve. I am trying to make a general frame that would enable one to write filters using this iterator.
Nadav -----Original Message----- From: [email protected] on behalf of David Warde-Farley Sent: Mon 23-Nov-09 03:21 To: Discussion of Numerical Python Subject: Re: [Numpy-discussion] neighborhood iterator On 22-Nov-09, at 12:50 PM, Nadav Horesh wrote: > > I wonder if the neighbourhood iterator can be used as a more > efficient replacement for ndimage.generic_filter. Is there a way to > use it from cython? Yes, using the NumPy C API, called like any other C function is from Cython. Something like: ###################### import numpy as np cimport numpy as np cdef extern from "numpy/arrayobject.h": object PyArray_NeighborhoodIterNew(object iter, np.npy_intp bounds, int mode, object, np.ndarray fill_value) int PyArrayNeighborhoodIter_Next(object iter) int PyArrayNeighborhoodIter_Reset(object iter) ###################### should do the trick. Note that you'll need to call np.import_array() before using any of these functions to initialize the C API, I think. David _______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
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