Examples of jfftw.FFTWReal.threeDimensionalForward()

jfftw.FFTWReal.threeDimensionalForward()

Method to take the three dimensional Forward DFT of a real cube held in one dimensional double array. the i,j,k pixel of the real cube is located in array element k * width * height + j * width + i

The Complex DFT is returned in a double array with real/imag parts in even/odd elements, with the i,j Complex components in

Real part located at 2(k * wft * height + j * wft + i)
Imag part located at 2(k * wft * height + j * wft + i) + 1
where wft = width/2 + 1. @param width the cube width @param height the cube height @param depth the cube depth @param realArray the cube data in array of length width*height*depth @param complexArray the output array, must be of length 2*depth*height*(width/2 + 1). If null or wrong length, a new array will be allocated. @return double[] DFT packed into one dimensional array @throws IllegalArgumentException ifwidth*height*depth is not equal the array length.

    FFTWReal fftw = new FFTWReal();


    //          Take out of place forward FFT, 
    //          return a double[] which hold Hermition 
    //          complex array in interleaved format.
    double ft[] = fftw.threeDimensionalForward(width,height,depth,d);
    
    //          Reconstruct, again out of place, back to real space
    double recon[] = fftw.threeDimensionalBackward(width,height,depth,ft);
    
    //          Scale the inverse by 1/N to (no scale in FFTW)

    FFTWReal fftw = new FFTWReal();


    //          Take out of place forward FFT, 
    //          return a double[] which hold Hermition 
    //          complex array in interleaved format.
    float ft[] = fftw.threeDimensionalForward(width,height,depth,d);
    
    //          Reconstruct, again out of place, back to real space
    float recon[] = fftw.threeDimensionalBackward(width,height,depth,ft);
    
    //          Scale the inverse by 1/N to (no scale in FFTW)

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