jigl.image
Class InterpolatedRealGrayImage

java.lang.Object
  |
  +--jigl.image.RealGrayImage
        |
        +--jigl.image.InterpolatedRealGrayImage

All Implemented Interfaces:

Image, InterpolatedImage

public class InterpolatedRealGrayImage

extends RealGrayImage

implements InterpolatedImage

An InterpolatedRealGrayImage is a RealGrayImage that can be accessed at other than integral locations. Supports nearest neighbor, bilinear, and bicubic interpolation.

Field Summary

static int	CUBIC
protected int	interpolationMethod
static int	LINEAR
static int	NEIGHBOR

Fields inherited from class jigl.image.RealGrayImage

data, X, Y

Constructor Summary

InterpolatedRealGrayImage()
Creates an empty InterpolatedRealGrayImage.

InterpolatedRealGrayImage(Image img)
Create an InterpolatedGrayImage from a Java image.

InterpolatedRealGrayImage(InterpolatedRealGrayImage img)
Deep copy

InterpolatedRealGrayImage(int x, int y)
Create an InterpolatedGrayImage with width x and height y.

InterpolatedRealGrayImage(RealGrayImage img)
Creates an InterpolatedRealGrayImage from a RealGrayImage.

Method Summary

void	accum(float x, float y, float value) Add value to the surrounding area of (x,y).
private static float	CatMull(float t, float y0, float y1, float y2, float y3) cubic interpolation using the CatMull-Rom method
Image	copy() Deep copy
int	getInterpolationMethod() Returns the interpolation method used.
float	interp(float x, float y) Returns the interpolated value at (x,y).
void	setInterpolationMethod(int m) Sets the interpolation method to be used.
void	splat(float x, float y, float value) Spread value to the surrounding area of (x,y).

Methods inherited from class jigl.image.RealGrayImage

absSum, add, add, add, add, add, add, addbuffer, addbuffer, addSum, byteSize, byteSize, clear, clear, clip, clip, copy, diff, divide, divide, divide, divide, divide, divide, get, getData, getJavaImage, max, max, median, median, min, min, multiply, multiply, multiply, multiply, multiply, multiply, set, set, sqrSum, subtract, subtract, subtract, subtract, subtract, subtract, toString, toString, X, Y

Methods inherited from class java.lang.Object

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

Methods inherited from interface jigl.image.Image

copy, getJavaImage, toString, X, Y

Field Detail

NEIGHBOR

public static final int NEIGHBOR

See Also:

Constant Field Values

LINEAR

public static final int LINEAR

See Also:

Constant Field Values

CUBIC

public static final int CUBIC

See Also:

Constant Field Values

interpolationMethod

protected int interpolationMethod

Constructor Detail

InterpolatedRealGrayImage

public InterpolatedRealGrayImage()

Creates an empty InterpolatedRealGrayImage.

InterpolatedRealGrayImage

public InterpolatedRealGrayImage(RealGrayImage img)

Creates an InterpolatedRealGrayImage from a RealGrayImage.

InterpolatedRealGrayImage

public InterpolatedRealGrayImage(int x,
                                 int y)

Create an InterpolatedGrayImage with width x and height y.

InterpolatedRealGrayImage

public InterpolatedRealGrayImage(InterpolatedRealGrayImage img)

Deep copy

InterpolatedRealGrayImage

public InterpolatedRealGrayImage(Image img)

Create an InterpolatedGrayImage from a Java image.

Method Detail

copy

public Image copy()

Deep copy

Specified by:

copy in interface Image

Overrides:

copy in class RealGrayImage

Returns:

a deep copy of RealGrayImage

getInterpolationMethod

public int getInterpolationMethod()

Returns the interpolation method used.

Specified by:

getInterpolationMethod in interface InterpolatedImage

setInterpolationMethod

public void setInterpolationMethod(int m)

Sets the interpolation method to be used. The edge cases of linear and cubic interpolation are treated differently to avoid ArrayIndexOutOfBoundsExceptions. Cubic uses linear interpolation when it is nest to the edge, and linear uses single-linear interpolation when it is right on the edge.

Specified by:

setInterpolationMethod in interface InterpolatedImage

interp

public float interp(float x,
                    float y)

Returns the interpolated value at (x,y).

accum

public void accum(float x,
                  float y,
                  float value)

Add value to the surrounding area of (x,y).

splat

public void splat(float x,
                  float y,
                  float value)

Spread value to the surrounding area of (x,y).

CatMull

private static float CatMull(float t,
                             float y0,
                             float y1,
                             float y2,
                             float y3)

cubic interpolation using the CatMull-Rom method