2.1.22.2.1.22 fft_fft_2d_correlation

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

Perform 2d correlation on 2 matrices.

Syntax

int fft_fft_2d_correlation( int iRows, int iCols, double * mSig1, double * mSig2 )

Parameters

iRows: [input] the number of rows in the source matrices
iCols: [input] the number of columns in the source matrices
mSig1: [modify] the real matrices of size (iRows * iCols) for input, and contains the correlation matrix in the output
mSig2: [modify] the real matrices of size (iRows * iCols) for input, and contains the fourier transform of the correlation matrix for output

Return

Retrun 0 for success or error codes.

Examples

EX1

#include <..\OriginLab\fft.h>
void fft_fft_2d_correlation_ex1()
{
    matrix sig1 = {{0, 0, 0},
                   {0, 1, 0},
                   {0, 0, 0}};
    matrix sig2 = {{1, 0, 1},
                   {0, 0, 0},
                   {1, 0, 1}};
    fft_fft_2d_correlation(3, 3, sig1, sig2);
    for (int ii=0; ii<3; ii++)
    {
        for (int jj=0; jj<3; jj++)
            printf ("%lf\t", sig1[ii][jj]);
        printf ("\n");
    }
    for (ii=0; ii<3; ii++)
    {
        for (int jj=0; jj<3; jj++)
            printf ("%lf\t", sig2[ii][jj]);
        printf ("\n");
    }
}