edu.umn.cs.spatialHadoop.visualization

Class FrequencyMapRasterLayer

java.lang.Object

edu.umn.cs.spatialHadoop.visualization.RasterLayer

edu.umn.cs.spatialHadoop.visualization.FrequencyMapRasterLayer

public class FrequencyMapRasterLayer
extends RasterLayer

A frequency map that can be used to visualize data as heat maps

Author:

Ahmed Eldawy

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FrequencyMapRasterLayer.GradientType
static class	FrequencyMapRasterLayer.SmoothType

Field Summary

Fields

Modifier and Type	Field and Description
protected float[]	brightnesses
protected java.awt.Color[]	colors
protected float[][]	frequencies Frequencies
protected FrequencyMapRasterLayer.GradientType	gradientType
protected float[]	hues
protected float[][]	kernel The kernel to use for stamping points
protected float[]	saturations

Fields inherited from class edu.umn.cs.spatialHadoop.visualization.RasterLayer

height, inputMBR, width

Constructor Summary

Constructors

Constructor and Description
FrequencyMapRasterLayer() Initialize an empty frequency map to be used to deserialize
FrequencyMapRasterLayer(Rectangle inputMBR, int width, int height, int radius, FrequencyMapRasterLayer.SmoothType smoothType) Initializes a frequency map with the given dimensions

Method Summary

Methods

Modifier and Type	Method and Description
void	addPoint(int cx, int cy) Adds a point to the frequency map
java.awt.image.BufferedImage	asImage()
protected java.awt.Color	calculateColor(float value, float minValue, float maxValue)
int	getHeight()
int	getWidth()
protected void	initKernel(int radius, FrequencyMapRasterLayer.SmoothType smoothType) Initialize a frequency map with the given radius and kernel type
void	mergeWith(FrequencyMapRasterLayer another)
void	readFields(java.io.DataInput in)
void	setGradientInfor(java.awt.Color color1, java.awt.Color color2, FrequencyMapRasterLayer.GradientType gradientType)
void	setValueRange(float min, float max) Sets the range of value to be used while drawing the heat map
void	write(java.io.DataOutput out)

Methods inherited from class edu.umn.cs.spatialHadoop.visualization.RasterLayer

getInputMBR, projectToImageSpace

Methods inherited from class java.lang.Object

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

Field Detail

kernel

protected float[][] kernel

The kernel to use for stamping points

frequencies

protected float[][] frequencies

Frequencies

colors

protected java.awt.Color[] colors

hues

protected float[] hues

saturations

protected float[] saturations

brightnesses

protected float[] brightnesses

gradientType

protected FrequencyMapRasterLayer.GradientType gradientType

Constructor Detail

FrequencyMapRasterLayer

public FrequencyMapRasterLayer()

Initialize an empty frequency map to be used to deserialize

FrequencyMapRasterLayer

public FrequencyMapRasterLayer(Rectangle inputMBR,
                       int width,
                       int height,
                       int radius,
                       FrequencyMapRasterLayer.SmoothType smoothType)

Initializes a frequency map with the given dimensions

Parameters:

width -

height -

Method Detail

initKernel

protected void initKernel(int radius,
              FrequencyMapRasterLayer.SmoothType smoothType)

Initialize a frequency map with the given radius and kernel type

Parameters:

radius -

smoothType -

setValueRange

public void setValueRange(float min,
                 float max)

Sets the range of value to be used while drawing the heat map

Parameters:

min -

max -

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Overrides:

write in class RasterLayer

Throws:

java.io.IOException

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Overrides:

readFields in class RasterLayer

Throws:

java.io.IOException

mergeWith

public void mergeWith(FrequencyMapRasterLayer another)

asImage

public java.awt.image.BufferedImage asImage()

addPoint

public void addPoint(int cx,
            int cy)

Adds a point to the frequency map

Parameters:

cx -

cy -

getWidth

public int getWidth()

Overrides:

getWidth in class RasterLayer

getHeight

public int getHeight()

Overrides:

getHeight in class RasterLayer

setGradientInfor

public void setGradientInfor(java.awt.Color color1,
                    java.awt.Color color2,
                    FrequencyMapRasterLayer.GradientType gradientType)

calculateColor

protected java.awt.Color calculateColor(float value,
                            float minValue,
                            float maxValue)