[SciPy-user] ndimage convolve vs. RAM issue...
fred
fredmfp at gmail.com
Tue Jan 20 06:22:17 EST 2009
Gael Varoquaux a écrit :
> On Tue, Jan 20, 2009 at 11:33:53AM +0100, fred wrote:
>> I really need some help, since ndimage.convolve is _very_ efficient ;-)
>
> Did you try fftconvolve?
Yep.
On a smaller kernel:
data: 600x800x720
kernel: 361
ndimage.convolve: 184 s
signal.fftconvolve: MemoryError
Another one :
data: 300x400x360
kernel: 361
ndimage.convolve: 22 s
signal.fftconvolve: 37 s
Besides this, ndimage.convolve can handle NaN, not signal.fftconvolve.
Cheers,
--
Fred
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