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Convolve Class Reference
Tools_internal

Convolution of two real vectors (in 1D or 2D) using Fast Fourier Transform. More...

Public Types

enum  EConvolutionMode {
  FFTW_LINEAR_FULL , FFTW_LINEAR_SAME_UNPADDED , FFTW_LINEAR_SAME , FFTW_LINEAR_VALID ,
  FFTW_CIRCULAR_SAME , FFTW_CIRCULAR_SAME_SHIFTED , FFTW_UNDEFINED
}
 convolution modes use LINEAR_SAME or CIRCULAR_SAME_SHIFTED for maximum performance
 
typedef std::vector< double > double1d_t
 definition of 1d vector of double
 
typedef std::vector< double1d_t > double2d_t
 definition of 2d vector of double
 

Public Member Functions

void fftconvolve (const double1d_t &source, const double1d_t &kernel, double1d_t &result)
 convolution in 1D
 
void fftconvolve (const double2d_t &source, const double2d_t &kernel, double2d_t &result)
 convolution in 2D
 
void init (int h_src, int w_src, int h_kernel, int w_kernel)
 prepare arrays for 2D convolution of given vectors
 
void setMode (EConvolutionMode mode)
 Sets convolution mode.
 

Detailed Description

Convolution of two real vectors (in 1D or 2D) using Fast Fourier Transform.

Usage: std::vector<double> signal, kernel, result; Convolve cv; cv.fftconvolve(signal, kernel, result)

Given code rely on code from Jeremy Fix page, http://jeremy.fix.free.fr/spip.php?article15, see also "Efficient convolution using the Fast Fourier Transform, Application in C++" by Jeremy Fix, May 30, 2011

Definition at line 33 of file Convolve.h.

The documentation for this class was generated from the following files: