Code covered by the BSD License
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conv2fft (h, X, shape, Xfft)
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dirup (dir)
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filter2fft (h, X, shape, Xfft...
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get_stack_trace (s)
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is_function_called (line, fun...
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myassert (observed, expected,...
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strend (str1, str2)
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test (varargin)
TODO: in stack information, replace pointers to temporary files with
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conv2fft_reuse
by Felipe G. Nievinski
06 Mar 2011
(Updated 07 Mar 2011)
Reuse intermediary results in multiple related convolutions with the same data but different kernels
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| File Information |
| Description |
Sometimes you have to perform multiple related convolutions, using the same data but different kernels. This function allows you to reuse intermediary results. When computing the convolution via multiplication in the frequency domain, we reuse the FFT of the data, and need to compute only the FFT of the kernel and the IFFT of their product. So this helps if the kernels are small and many and the data is large and unique. Matrix (not just vector) input is supported. Calling syntax is identical to Matlab's own conv2/filter2. If you need an FFT-based implementation of convolution without reuse, I'd recommend submission number 24504. Run test('filter2fft') to check your installation. |
| Acknowledgements |
The author wishes to acknowledge the following in the creation of this submission:
FFT-based convolution, testit
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| MATLAB release |
MATLAB 7.9 (2009b)
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| Updates |
| 07 Mar 2011 |
updated list of acknowledgements and list of incorporated submissions. |
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