CODEWITHSUNDEEP
c++3dcudaconvolution
user237147
user237147

Reputation: 31

3d convolution in c++

I'm looking for some source code implementing 3d convolution. Ideally, I need C++ code or CUDA code. I'd appreciate if anybody can point me to a nice and fast implementation :-)

Cheers

Upvotes: 3

Views: 5669

Answers (3)

Sayan Ghosh
Sayan Ghosh

Reputation: 261

Intel has a very good example - using SSE + OpenMP and a serial version of it. The code is primarily meant to profile the serial and a parallel approach, but is done in a nice way. http://software.intel.com/en-us/articles/16bit-3d-convolution-sse4openmp-implementation-on-penryn-cpu/

Upvotes: 0

Tom
Tom

Reputation: 21108

Are you a registered developer? If so you should download the 3.0 SDK and check out the FDTD3d sample which shows a 3d convolution as applied for an explicit finite differences app. In the 2.3 SDK there was a sample called 3dfd which was similar (and has now been replaced).

It may be more efficient to use this approach rather than FFT if your impulse response is short.

Upvotes: 0

andrew cooke
andrew cooke

Reputation: 46882

you understand that convolution is normally done by using an fft? see, for example, http://en.wikipedia.org/wiki/Convolution

so you need an fft library.

Fastest method to compute convolution suggests http://www.fftw.org/ (for a traditional cpu).

for cuda, use cufft - http://www.gsic.titech.ac.jp/~ccwww/tebiki/tesla_e/tesla6_e.html

Upvotes: 3

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