Facemorph.multifilter
Class FourierDecompose

java.lang.Object
  Facemorph.multifilter.FourierDecompose

public class FourierDecompose
extends java.lang.Object

Decompose an image using Fourier based filtering with a filter bank

Constructor Summary

FourierDecompose(int w, int h, int l, double scaleFactor)
Constructor builds filters of size wxh

Method Summary

java.util.ArrayList<Complex[]>	analyse(Complex[] data) Analyse the image as a Complex array and return the result as a set of Complex responses
java.util.ArrayList<FloatImage>	analyse(FloatImage fimg) Analyse an image using the filter bank
java.util.ArrayList<FloatImage>	analyseExhaustive(FloatImage fimg) Exhaustive search for best filter components Adds components until sum squared errors is > 30000 or 1000 iterations exceeded
void	imposeSymmetry(Complex[] response) Impose conjugate symmetry on the complex response
static void	main(java.lang.String[] args) Main method used for testing
FloatImage	reconstruct(java.util.ArrayList<FloatImage> responses) Reconstruct fom a set of FloatImage responses
Complex[]	reconstructComplex(java.util.ArrayList<Complex[]> responses) Reconstruct in the Fourier domain

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FourierDecompose

public FourierDecompose(int w,
                        int h,
                        int l,
                        double scaleFactor)

Constructor builds filters of size wxh

Parameters:

w - width

h - height

l - levels

scaleFactor - the scale change between pyramid levels

Method Detail

analyse

public java.util.ArrayList<FloatImage> analyse(FloatImage fimg)

Analyse an image using the filter bank

Parameters:

fimg - the image to analyse

Returns:

returns the filter responses

analyse

public java.util.ArrayList<Complex[]> analyse(Complex[] data)

Analyse the image as a Complex array and return the result as a set of Complex responses

Parameters:

data - the image (Fourier domain)

Returns:

returns the responses in the Fourier domain

imposeSymmetry

public void imposeSymmetry(Complex[] response)

Impose conjugate symmetry on the complex response

Parameters:

response -

reconstruct

public FloatImage reconstruct(java.util.ArrayList<FloatImage> responses)

Reconstruct fom a set of FloatImage responses

Parameters:

responses - the response to rebuild the image from

Returns:

returns the reconstructed image (spatial domain)

reconstructComplex

public Complex[] reconstructComplex(java.util.ArrayList<Complex[]> responses)

Reconstruct in the Fourier domain

Parameters:

responses - the FFT responses

Returns:

return the reconstruction in the Fourier domain

analyseExhaustive

public java.util.ArrayList<FloatImage> analyseExhaustive(FloatImage fimg)

Exhaustive search for best filter components Adds components until sum squared errors is > 30000 or 1000 iterations exceeded

Parameters:

fimg - the image to analyse

Returns:

returns the set of approximating response images

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Main method used for testing

Parameters:

args - args[0] = name of file

Throws:

java.io.IOException