各位高手：在VC里如何实现傅里叶变换
我想用VC实现傅里叶变换，或者调用Matlab里的fft()函数也行，但要能不依赖Matlab独立运行。请各位高手帮帮忙，在下不胜感激！

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自己写吧 应该不算复杂
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C/C++ code

// Fourier.h: interface for the Fourier class.////////////////////////////////////////////////////////////////////////#if !defined(AFX_FOURIER_H__6939C9A4_8D93_41A3_9521_3B863957EB8E__INCLUDED_)#define AFX_FOURIER_H__6939C9A4_8D93_41A3_9521_3B863957EB8E__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000/* * fft.h * * loic fonteneau 15-feb-2001 * Perform discrete FFT * * Original code : Don Cross <dcross@intersrv.com> * http://www.intersrv.com/~dcross/fft.html * *//////////////////////////////  function prototypes  /////////////////////////////void fft_double(unsigned int p_nSamples, bool p_bInverseTransform, double *p_lpRealIn, double *p_lpImagIn, double *p_lpRealOut, double *p_lpImagOut);bool IsPowerOfTwo(unsigned int p_nX);unsigned int NumberOfBitsNeeded(unsigned int p_nSamples);unsigned int ReverseBits(unsigned int p_nIndex, unsigned int p_nBits);double Index_to_frequency(unsigned int p_nBaseFreq, unsigned int p_nSamples, unsigned int p_nIndex);///////////////////////////////  constantes-definition  ///////////////////////////////#define  PI  (3.14159265358979323846)#endif // !defined(AFX_FOURIER_H__6939C9A4_8D93_41A3_9521_3B863957EB8E__INCLUDED_)
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C/C++ code
// Fourier.cpp: implementation of the Fourier class.//////////////////////////////////////////////////////////////////////////#include "stdafx.h"#include "Fourier.h"#include <math.h>#ifdef _DEBUG#undef THIS_FILEstatic char THIS_FILE[]=__FILE__;#define new DEBUG_NEW#endif/* * fft.cpp * * loic fonteneau 15-feb-2001 * Perform discrete FFT * * Original code : Don Cross <dcross@intersrv.com> * http://www.intersrv.com/~dcross/fft.html * */#ifndef NULL#define NULL '\0'#endif//////////////////////////////////////////////////////////////////////////////////////// do the fft for double numbers//////////////////////////////////////////////////////////////////////////////////////void fft_double (unsigned int p_nSamples, bool p_bInverseTransform, double *p_lpRealIn, double *p_lpImagIn, double *p_lpRealOut, double *p_lpImagOut){    if(!p_lpRealIn || !p_lpRealOut || !p_lpImagOut) return;    unsigned int NumBits;    unsigned int i, j, k, n;    unsigned int BlockSize, BlockEnd;    double angle_numerator = 2.0 * PI;    double tr, ti;    if( !IsPowerOfTwo(p_nSamples) )    {        return;    }    if( p_bInverseTransform ) angle_numerator = -angle_numerator;    NumBits = NumberOfBitsNeeded ( p_nSamples );    for( i=0; i < p_nSamples; i++ )    {        j = ReverseBits ( i, NumBits );        p_lpRealOut[j] = p_lpRealIn[i];        p_lpImagOut[j] = (p_lpImagIn == NULL) ? 0.0 : p_lpImagIn[i];    }    BlockEnd = 1;    for( BlockSize = 2; BlockSize <= p_nSamples; BlockSize <<= 1 )    {        double delta_angle = angle_numerator / (double)BlockSize;        double sm2 = sin ( -2 * delta_angle );        double sm1 = sin ( -delta_angle );        double cm2 = cos ( -2 * delta_angle );        double cm1 = cos ( -delta_angle );        double w = 2 * cm1;        double ar[3], ai[3];        for( i=0; i < p_nSamples; i += BlockSize )        {            ar[2] = cm2;            ar[1] = cm1;            ai[2] = sm2;            ai[1] = sm1;            for ( j=i, n=0; n < BlockEnd; j++, n++ )            {                ar[0] = w*ar[1] - ar[2];                ar[2] = ar[1];                ar[1] = ar[0];                ai[0] = w*ai[1] - ai[2];                ai[2] = ai[1];                ai[1] = ai[0];                k = j + BlockEnd;                tr = ar[0]*p_lpRealOut[k] - ai[0]*p_lpImagOut[k];                ti = ar[0]*p_lpImagOut[k] + ai[0]*p_lpRealOut[k];                p_lpRealOut[k] = p_lpRealOut[j] - tr;                p_lpImagOut[k] = p_lpImagOut[j] - ti;                p_lpRealOut[j] += tr;                p_lpImagOut[j] += ti;            }        }        BlockEnd = BlockSize;    }    if( p_bInverseTransform )    {        double denom = (double)p_nSamples;        for ( i=0; i < p_nSamples; i++ )        {            p_lpRealOut[i] /= denom;            p_lpImagOut[i] /= denom;        }    }}//////////////////////////////////////////////////////////////////////////////////////// check is a number is a power of 2//////////////////////////////////////////////////////////////////////////////////////bool IsPowerOfTwo( unsigned int p_nX ){    if( p_nX < 2 ) return false;    if( p_nX & (p_nX-1) ) return false;    return true;}//////////////////////////////////////////////////////////////////////////////////////// return needed bits for fft//////////////////////////////////////////////////////////////////////////////////////unsigned int NumberOfBitsNeeded( unsigned int p_nSamples ){    int i;    if( p_nSamples < 2 )    {        return 0;    }    for ( i=0; ; i++ )    {        if( p_nSamples & (1 << i) ) return i;    }}//////////////////////////////////////////////////////////////////////////////////////// ?//////////////////////////////////////////////////////////////////////////////////////unsigned int ReverseBits(unsigned int p_nIndex, unsigned int p_nBits){    unsigned int i, rev;    for(i=rev=0; i < p_nBits; i++)    {        rev = (rev << 1) | (p_nIndex & 1);        p_nIndex >>= 1;    }    return rev;}//////////////////////////////////////////////////////////////////////////////////////// return a frequency from the basefreq and num of samples//////////////////////////////////////////////////////////////////////////////////////double Index_to_frequency(unsigned int p_nBaseFreq, unsigned int p_nSamples, unsigned int p_nIndex){    if(p_nIndex >= p_nSamples)    {        return 0.0;    }    else if(p_nIndex <= p_nSamples/2)    {        return ( (double)p_nIndex / (double)p_nSamples * p_nBaseFreq );    }    else    {        return ( -(double)(p_nSamples-p_nIndex) / (double)p_nSamples * p_nBaseFreq );    }} 
 
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http://hi.baidu.com/posinfo/blog/item/473ac04edb61593cafc3ab99.html
这里有一篇
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我的资源里面有一本书的图像处理编程的源代码，里面就有FFT，小波变换等算法
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fft网上有写好的库，调用一下就行，自己写的执行速度不行……