edu.umich.eecs.april.image

Class FloatImage

java.lang.Object

edu.umich.eecs.april.image.FloatImage

public class FloatImage
extends java.lang.Object

An image backed by a floating point data.

Field Summary

Fields

Modifier and Type	Field and Description
float[]	d
int	height
(package private) static java.util.Random	r
int	width

Constructor Summary

Constructors

Constructor and Description
FloatImage(java.awt.image.BufferedImage im)
FloatImage(java.awt.image.BufferedImage im, int rightshift)
FloatImage(int width, int height)
FloatImage(int width, int height, byte[] d) Make FloatImage from byte array, scaling inputs to range (0,1)
FloatImage(int width, int height, double[] d)
FloatImage(int width, int height, float[] d)

Method Summary

Modifier and Type	Method and Description
FloatImage	abs()
void	addNoise(double stddev)
FloatImage	clamp(float minv, float maxv) Perform 2D convolution using 2D filter.
FloatImage	copy()
FloatImage	decimate()
FloatImage	decimateAvg()
FloatImage	decimateMax()
FloatImage	filterFactoredCentered(float[] fhoriz, float[] fvert) Perform 2D convolution using f as the factor of a separable filter, shifting the output by -f.length/2 so there is no net shift.
FloatImage	filterFactoredCentered(float[] fhoriz, float[] fvert, float[] r) Perform 2D convolution using f as the factor of a separable filter, shifting the output by -f.length/2 so there is no net shift.
FloatImage	filterFactoredCenteredMax(float[] fhoriz, float[] fvert) Perform 2D convolution using f as the factor of a separable filter, shifting the output by -f.length/2 so there is no net shift.
FloatImage	filterHorizontalCentered(float[] f)
FloatImage	filterVerticalCentered(float[] f)
float	get(int x, int y)
byte[]	getByteData() Get byte data from FloatImage scaled from 0 to 255
static float[]	imageToFloats(java.awt.image.BufferedImage im)
static float[]	imageToFloats(java.awt.image.BufferedImage im, int rightshift)
static float[]	imageToFloats(java.awt.image.BufferedImage im, int rightshift, float[] f)
FloatImage	interpolate(double sigma, int size) Interpolate image, followed by a gaussian filter with given sigma.
java.util.ArrayList<float[]>	localMaxima()
java.util.ArrayList<float[]>	localMinima() Returns x, y, magnitude.
java.awt.image.BufferedImage	makeColorImage()
java.awt.image.BufferedImage	makeImage()
static java.awt.image.BufferedImage	makeImage(FloatImage rim, FloatImage gim, FloatImage bim)
FloatImage	normalize() Rescale all values so that they are between [0,1]
FloatImage	scale(double s)
void	set(int x, int y, float v)
FloatImage	subtract(FloatImage fim)
FloatImage	subtract(FloatImage fim, float[] r)

Methods inherited from class java.lang.Object

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

Field Detail

width

public int width

height

public int height

d

public float[] d

r

static java.util.Random r

Constructor Detail

FloatImage

public FloatImage(int width,
                  int height)

FloatImage

public FloatImage(int width,
                  int height,
                  float[] d)

FloatImage

public FloatImage(int width,
                  int height,
                  double[] d)

FloatImage

public FloatImage(int width,
                  int height,
                  byte[] d)

Make FloatImage from byte array, scaling inputs to range (0,1)

FloatImage

public FloatImage(java.awt.image.BufferedImage im)

FloatImage

public FloatImage(java.awt.image.BufferedImage im,
                  int rightshift)

Method Detail

copy

public FloatImage copy()

getByteData

public final byte[] getByteData()

Get byte data from FloatImage scaled from 0 to 255

get

public final float get(int x,
                       int y)

set

public final void set(int x,
                      int y,
                      float v)

filterFactoredCentered

public FloatImage filterFactoredCentered(float[] fhoriz,
                                         float[] fvert)

Perform 2D convolution using f as the factor of a separable filter, shifting the output by -f.length/2 so there is no net shift.

filterFactoredCentered

public FloatImage filterFactoredCentered(float[] fhoriz,
                                         float[] fvert,
                                         float[] r)

Perform 2D convolution using f as the factor of a separable filter, shifting the output by -f.length/2 so there is no net shift. Allows specifying the output buffer to prevent unnecessary data allocation.

filterFactoredCenteredMax

public FloatImage filterFactoredCenteredMax(float[] fhoriz,
                                            float[] fvert)

Perform 2D convolution using f as the factor of a separable filter, shifting the output by -f.length/2 so there is no net shift.

filterHorizontalCentered

public FloatImage filterHorizontalCentered(float[] f)

filterVerticalCentered

public FloatImage filterVerticalCentered(float[] f)

clamp

public FloatImage clamp(float minv,
                        float maxv)

Perform 2D convolution using 2D filter. The output is shifted by public FloatImage filterCentered(float f[][]) { return null; }

normalize

public FloatImage normalize()

Rescale all values so that they are between [0,1]

addNoise

public void addNoise(double stddev)

scale

public FloatImage scale(double s)

decimate

public FloatImage decimate()

decimateAvg

public FloatImage decimateAvg()

decimateMax

public FloatImage decimateMax()

interpolate

public FloatImage interpolate(double sigma,
                              int size)

Interpolate image, followed by a gaussian filter with given sigma.

abs

public FloatImage abs()

subtract

public FloatImage subtract(FloatImage fim)

subtract

public FloatImage subtract(FloatImage fim,
                           float[] r)

makeImage

public static java.awt.image.BufferedImage makeImage(FloatImage rim,
                                                     FloatImage gim,
                                                     FloatImage bim)

makeImage

public java.awt.image.BufferedImage makeImage()

makeColorImage

public java.awt.image.BufferedImage makeColorImage()

imageToFloats

public static float[] imageToFloats(java.awt.image.BufferedImage im)

imageToFloats

public static float[] imageToFloats(java.awt.image.BufferedImage im,
                                    int rightshift)

imageToFloats

public static float[] imageToFloats(java.awt.image.BufferedImage im,
                                    int rightshift,
                                    float[] f)

localMaxima

public java.util.ArrayList<float[]> localMaxima()

localMinima

public java.util.ArrayList<float[]> localMinima()

Returns x, y, magnitude.