Facemorph.oesf
Class OESF

java.lang.Object
  Facemorph.oesf.OESF

public class OESF
extends java.lang.Object

Implementation of Optimal Synthetic Exact Filters

Constructor Summary

OESF()

Method Summary

FloatImage[]	buildFilter(java.lang.String file, HaarReader haar, boolean orientation, int[] plist) Build a set of OESF filters
FloatImage	buildFilter(java.lang.String file, HaarReader haar, int[] plist) Build an OESF filter
static FloatImage	centre(FloatImage fimg) Shift the origin to centre for easier human veiwing / interpretation
static FloatImage	convert(Complex[] a, int w, int h) Converts an array of Complex back into a FloatImage, discarding imaginary components
static Complex[]	convert(FloatImage fimg) Scan converts a FloatImage to an array of Complex
static Complex[]	convert(FloatImage[] fimg) Converts a pair of FloatImages {real, imaginary} into a Complex array
static FloatImage[]	convertComplex(Complex[] a, int w, int h) Convert a Complex array into a pair of FloatImages {real, imaginary}
static java.awt.Rectangle	detectFace(java.awt.image.BufferedImage bimg, HaarReader haar) Detect a face
static java.awt.Rectangle	detectFace(java.awt.image.BufferedImage bimg, HaarReader haar, java.awt.Rectangle prevRect) Detect a face
static FloatImage	filter(FloatImage fimg, Complex[] filt, int[] dim) Apply a filter to an image
static FloatImage[]	filterComplex(FloatImage fimg, Complex[] filt, int[] dim) Filters a real image with a complex filter
static Complex[]	getMultiResponse(Template tem, int[] plist, int[] dim) Get an idealised response image for all listed features in the Template
static Complex[]	getResponse(float x, float y, double angle, int[] dim) Get the response image with orientation information (trying to detect orientation doesn't seem to work all that well)
static Complex[]	getResponse(float x, float y, int[] dim) Create an idealised response image
static boolean	hasNextQuotedString(java.util.Scanner sc) Returns true if the next token is the beginning of a quoted string value.
static void	main(java.lang.String[] args) Main method used for testing
static java.lang.String	nextQuotedString(java.util.Scanner sc) Scans a quoted string value from the scanner input.
static void	preprocess(FloatImage fimg) Preprocess the image using a log transform (y=log(1+x)), normalis mean and sd and sine window
void	read(java.lang.String dir) Read an OESF filter from file
static void	testFilter(java.lang.String file, java.util.ArrayList<FloatImage> filters, FloatImage prior, HaarReader haar) Test the filter
static void	testFilterComplex(java.lang.String file, java.util.ArrayList<FloatImage[]> filters, FloatImage prior, HaarReader haar) Test the complex filter
void	write(java.lang.String dir) Writes the filters and prior data to file

Methods inherited from class java.lang.Object

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

Constructor Detail

OESF

public OESF()

Method Detail

convert

public static Complex[] convert(FloatImage fimg)

Scan converts a FloatImage to an array of Complex

Parameters:

fimg - the FloatImage to convert

Returns:

returns an array of Complex

convert

public static Complex[] convert(FloatImage[] fimg)

Converts a pair of FloatImages {real, imaginary} into a Complex array

Parameters:

fimg - the pair of images to convert

Returns:

returns an array of Complex

convert

public static FloatImage convert(Complex[] a,
                                 int w,
                                 int h)

Converts an array of Complex back into a FloatImage, discarding imaginary components

Parameters:

a - the complex array of data

w - the output width

h - the output height

Returns:

returns the real part as a FloatImage

convertComplex

public static FloatImage[] convertComplex(Complex[] a,
                                          int w,
                                          int h)

Convert a Complex array into a pair of FloatImages {real, imaginary}

Parameters:

a - the Complex array

w - the output width

h - the output height

Returns:

returns 2 FloatImages, one for the real parts and one for the complex

preprocess

public static void preprocess(FloatImage fimg)

Preprocess the image using a log transform (y=log(1+x)), normalis mean and sd and sine window

Parameters:

fimg - the image to preprocess

getResponse

public static Complex[] getResponse(float x,
                                    float y,
                                    int[] dim)

Create an idealised response image

Parameters:

x - the x-coord of the feature

y - the y-coord of the feature

dim - the dimensions of the Complex array, should be {128, 128}

Returns:

returns the complex array

getMultiResponse

public static Complex[] getMultiResponse(Template tem,
                                         int[] plist,
                                         int[] dim)

Get an idealised response image for all listed features in the Template

Parameters:

tem - the Template

plist - the list of points from the Template to use

dim - the dimension (should be {128, 128}

Returns:

return the response image for all the features

getResponse

public static Complex[] getResponse(float x,
                                    float y,
                                    double angle,
                                    int[] dim)

Get the response image with orientation information (trying to detect orientation doesn't seem to work all that well)

Parameters:

x - the x-coord

y - the y-coord

angle - the angle of the feature rotation

dim - the dimensionality should be {128, 128}

Returns:

returns the response image

buildFilter

public FloatImage buildFilter(java.lang.String file,
                              HaarReader haar,
                              int[] plist)
                       throws java.io.FileNotFoundException,
                              java.io.IOException

Build an OESF filter

Parameters:

file - list of images in a file

haar - face detector

plist - list of points to use from each template (only the first point is returned)

Returns:

returns the optimal filter

Throws:

java.io.FileNotFoundException

java.io.IOException

buildFilter

public FloatImage[] buildFilter(java.lang.String file,
                                HaarReader haar,
                                boolean orientation,
                                int[] plist)
                         throws java.io.FileNotFoundException,
                                java.io.IOException

Build a set of OESF filters

Parameters:

file - the name of the file containing the list of images and template

haar - the face detector

orientation - idicates that we want to try and learn detectors that give us the orientation

plist - the list of points to use from the templates

Returns:

return the set of filters, one for each point

Throws:

java.io.FileNotFoundException

java.io.IOException

write

public void write(java.lang.String dir)
           throws java.io.IOException

Writes the filters and prior data to file

Parameters:

dir - the folder to write to (filter.fimg, prior.fimg and data.txt are written to this file)

Throws:

java.io.IOException

read

public void read(java.lang.String dir)
          throws java.io.IOException

Read an OESF filter from file

Parameters:

dir - the directory to read from (reads filter.fimg, prior.fimg and data.txt)

Throws:

java.io.IOException

centre

public static FloatImage centre(FloatImage fimg)

Shift the origin to centre for easier human veiwing / interpretation

Parameters:

fimg - the filter image to centre

Returns:

returns the fiter image centred on its midpoint

filter

public static FloatImage filter(FloatImage fimg,
                                Complex[] filt,
                                int[] dim)

Apply a filter to an image

Parameters:

fimg - the image to apply the filter to

filt - the FFT of the filter

dim - the dimensionality data {128, 128}

Returns:

return the filtered image (spatial domain)

filterComplex

public static FloatImage[] filterComplex(FloatImage fimg,
                                         Complex[] filt,
                                         int[] dim)

Filters a real image with a complex filter

Parameters:

fimg - the image to filter

filt - the FFT of the complex filter

dim - the dimensionality

Returns:

returns the real and imaginary components of the filtered image

detectFace

public static java.awt.Rectangle detectFace(java.awt.image.BufferedImage bimg,
                                            HaarReader haar)

Detect a face

Parameters:

bimg - the image to look for faces in

haar -

Returns:

return the biggest face detected or null

detectFace

public static java.awt.Rectangle detectFace(java.awt.image.BufferedImage bimg,
                                            HaarReader haar,
                                            java.awt.Rectangle prevRect)

Detect a face

Parameters:

bimg - the image to look for faces in

haar - the face detector

prevRect - the previous rectangle, if not null it is added to list of candidate rectangles

Returns:

return the biggest face detected or null

testFilter

public static void testFilter(java.lang.String file,
                              java.util.ArrayList<FloatImage> filters,
                              FloatImage prior,
                              HaarReader haar)
                       throws java.io.FileNotFoundException,
                              java.io.IOException

Test the filter

Parameters:

file - the file to read image and template names from

filters - the filters to use

prior - the prior data

haar - the face detector

Throws:

java.io.FileNotFoundException

java.io.IOException

testFilterComplex

public static void testFilterComplex(java.lang.String file,
                                     java.util.ArrayList<FloatImage[]> filters,
                                     FloatImage prior,
                                     HaarReader haar)
                              throws java.io.FileNotFoundException,
                                     java.io.IOException

Test the complex filter

Parameters:

file - the file to read image and template names from

filters - the filters to use

prior - the prior data

haar - the face detector

Throws:

java.io.FileNotFoundException

java.io.IOException

main

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

Main method used for testing

Parameters:

args - the program args, args[0] = list of images and template to build from, args[1] = test list

Throws:

java.io.FileNotFoundException

java.io.IOException

hasNextQuotedString

public static boolean hasNextQuotedString(java.util.Scanner sc)

Returns true if the next token is the beginning of a quoted string value.

Parameters:

sc - the Scanner to read from

Returns:

returns true if the Scanner has a next quoted string

nextQuotedString

public static java.lang.String nextQuotedString(java.util.Scanner sc)

Scans a quoted string value from the scanner input.

Parameters:

sc - the Scanner to read from

Returns:

returns the next quoted string