ITK/Release 4/Refactor Numerical Libraries/Inventory/Fourier Transforms: Difference between revisions
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(Created page with "= The Problem = ITK obtains Fast Fourier Transform (FFT) functionalities from * VXL - as software included as third party library * FFTW - as a configuration time option == Wh...") |
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* VXL - as software included as third party library | * VXL - as software included as third party library | ||
* FFTW - as a configuration time option | * FFTW - as a configuration time option | ||
To choose between these two options you use, at CMake configuration time, the following variable | |||
== Where is the Code == | == Where is the Code == | ||
| Line 26: | Line 29: | ||
== VXL == | == VXL == | ||
The FFT | The FFT code in VXL is in the directory | ||
ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/algo | |||
and include the following files | |||
* vnl_fft_1d.h | |||
* vnl_fft_1d.txx | |||
* vnl_fft_2d.h | |||
* vnl_fft_2d.txx | |||
* vnl_fft_base.h | |||
* vnl_fft_base.txx | |||
* vnl_fft.cxx | |||
* vnl_fft.h | |||
* vnl_fft_prime_factors.h | |||
* vnl_fft_prime_factors.txx | |||
The code acepts images whose number of pixels is a multiple of powers of the following prime numbers: | |||
* 2 | |||
* 3 | |||
* 5 | |||
= Benchmark Test = | = Benchmark Test = | ||
= Options = | = Options = | ||
Revision as of 22:20, 25 August 2011
The Problem
ITK obtains Fast Fourier Transform (FFT) functionalities from
- VXL - as software included as third party library
- FFTW - as a configuration time option
To choose between these two options you use, at CMake configuration time, the following variable
Where is the Code
ITK classes that provide FFT filters can be found in the Module:
ITK/Modules/Filtering/FFT
They include
- itkFFTShiftImageFilter.h
- itkFFTWForwardFFTImageFilter.h
- itkFFTWInverseFFTImageFilter.h
- itkForwardFFTImageFilter.h
- itkInverseFFTImageFilter.h
- itkVnlForwardFFTImageFilter.h
- itkVnlInverseFFTImageFilter.h
- vnl_fft_3d.h
VXL
The FFT code in VXL is in the directory
ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/algo
and include the following files
- vnl_fft_1d.h
- vnl_fft_1d.txx
- vnl_fft_2d.h
- vnl_fft_2d.txx
- vnl_fft_base.h
- vnl_fft_base.txx
- vnl_fft.cxx
- vnl_fft.h
- vnl_fft_prime_factors.h
- vnl_fft_prime_factors.txx
The code acepts images whose number of pixels is a multiple of powers of the following prime numbers:
- 2
- 3
- 5
