Package org.eclipse.imagen.media.util

Class InterpAverage

Object

Interpolation

InterpAverage

All Implemented Interfaces:

Serializable

public class InterpAverage
extends Interpolation

An Interpolation class which performs simple averaging of all pixels within a specified neighborhood. It is used by the "SubsampleAverage" operation implementations.

See Also:

• Serialized Form

Field Summary

Fields inherited from class Interpolation

INTERP_BICUBIC, INTERP_BICUBIC_2, INTERP_BILINEAR, INTERP_NEAREST

Constructor Summary

Constructors

Constructor	Description
InterpAverage(int blockX, int blockY)	Creates an InterpAverage instance having the supplied dimensions.

Method Summary

Modifier and Type	Method	Description
double	interpolateH(double[] samples, float xfrac)	Returns the average of all elements in samples; xfrac is ignored.
float	interpolateH(float[] samples, float xfrac)	Returns the average of all elements in samples; xfrac is ignored.
int	interpolateH(int[] samples, int xfrac)	Returns the average of all elements in samples; xfrac is ignored.

Methods inherited from class Interpolation

getBottomPadding, getHeight, getInstance, getLeftPadding, getRightPadding, getSubsampleBitsH, getSubsampleBitsV, getTopPadding, getWidth, interpolate, interpolate, interpolate, interpolate, interpolate, interpolate, interpolate, interpolate, interpolate, interpolateH, interpolateH, interpolateH, interpolateH, interpolateH, interpolateH, interpolateV, interpolateV, interpolateV, interpolateV, interpolateV, interpolateV, interpolateV, interpolateV, interpolateV, isSeparable

Methods inherited from class Object

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

Constructor Details

InterpAverage

public InterpAverage(int blockX,
 int blockY)

Creates an InterpAverage instance having the supplied dimensions. The left and top padding are (blockX - 1)/2 and (blockY - 1)/2, respectively. The subsampleBitsH and subsampleBitsV instance variables are set to 32.

Parameters:

blockX - The width of the interpolation block.

blockY - The height of the interpolation block.

Throws:

IllegalArgumentException - if either parameter is non-positive.

Method Details

interpolateH

public int interpolateH(int[] samples,
 int xfrac)

Returns the average of all elements in samples; xfrac is ignored.

Specified by:

interpolateH in class Interpolation

Parameters:

samples - an array of ints.

xfrac - the subsample position, multiplied by 2^{(subsampleBitsH)}.

Returns:

the interpolated value as an int.

interpolateH

public float interpolateH(float[] samples,
 float xfrac)

Returns the average of all elements in samples; xfrac is ignored.

Specified by:

interpolateH in class Interpolation

Parameters:

samples - an array of floats.

xfrac - the X subsample position, in the range [0.0F, 1.0F).

Returns:

the interpolated value as a float.

interpolateH

public double interpolateH(double[] samples,
 float xfrac)

Returns the average of all elements in samples; xfrac is ignored.

Specified by:

interpolateH in class Interpolation

Parameters:

samples - an array of doubles.

xfrac - the X subsample position, in the range [0.0F, 1.0F).

Returns:

the interpolated value as a double.