cz.cuni.jagrlib.piece
Class DCT

java.lang.Object
  cz.cuni.jagrlib.DefaultProperty
      cz.cuni.jagrlib.Piece
          cz.cuni.jagrlib.DefaultDiscreteTransform
              cz.cuni.jagrlib.piece.DCT

All Implemented Interfaces:

Breakable, DiscreteTransform, PersistentParamsBinary, Property, Template

public class DCT
extends DefaultDiscreteTransform

Discrete cosine transform (can process 1D or 2D data of arbitrary size).

Since:

0.25

See Also:

DCT.java

Field Summary

protected double[][]	base Transform bases for last computed transform sizes (accelerator).
protected int	last Last cache to be recycled (0 or 1.
protected int[]	len Last computed transform sizes (accelerator).
static RegPiece	reg Static registration instance for this class.
protected double[]	tmpD Temporary array for in-place transforms.

Fields inherited from class cz.cuni.jagrlib.DefaultDiscreteTransform

CATEGORY, TEMPLATE_NAME

Fields inherited from class cz.cuni.jagrlib.Piece

channels, info, pl, plugs, TEMPLATE_TYPE, userBreak

Fields inherited from interface cz.cuni.jagrlib.iface.Property

LOGGING, STATISTICS, TEXT_DESCRIPTION

Fields inherited from interface cz.cuni.jagrlib.Template

ALL_PLUGS, C_1D, C_2D, C_3D, C_ALPHA, C_BINARY, C_BREP, C_CAMERA, C_CIRCLE, C_CLIP, C_COMPRESSION, C_CURVE, C_DATA, C_DRAW, C_EDITOR, C_ELLIPSE, C_FILL, C_FILTER, C_FLOAT, C_FUNCTION, C_IMAGE, C_INTEGER, C_IO, C_LIGHT, C_LINE, C_METRIC, C_POLYGON, C_PROJECTION, C_RADIOSITY, C_RASTER, C_RENDER, C_SAMPLE, C_SCENE, C_SET, C_SOLID, C_TEXT, C_TRANSFORM, C_VECTOR, C_VIEWER, C_WORKER, CAT_EMPTY, EMPTY, IFACE, JAGRLIB, JAGRLIB2, MANIPULATOR_COMBO, MANIPULATOR_CUSTOM, MANIPULATOR_DEFAULT, MANIPULATOR_MULTILINE, PL_ALPHAMASK, PL_BITMASK, PL_CAUSTIC, PL_CODEC, PL_COLORMAP, PL_COMPARE, PL_DATA, PL_DIRECT, PL_EDITOR, PL_FILTER, PL_FUNCTION, PL_IMAGE, PL_IMPORT, PL_INPUT, PL_INTERSECTION, PL_LIGHTSOURCE, PL_ORDER, PL_OUTPUT, PL_PALETTE, PL_PHOTON, PL_PROPERTY, PL_QUANTIZER, PL_RASTER, PL_RENDER, PL_SHADOW, PL_STREAM, PL_TRANSFORM, PL_TRIGGER, PL_VOLUME, PL_WINDOW, TYPE_BOOLEAN, TYPE_DOUBLE, TYPE_FLOAT, TYPE_INTEGER, TYPE_LONG, TYPE_OBJECT, TYPE_STRING

Constructor Summary

DCT()

Method Summary

protected double[]	assertBase(int l) Computes base matrix for the given size.
boolean	getSizeBounds(int[] bounds) Get extreme domain (source) ranges.
int	inverse1D(double[] coef, int len, double[] sample, int start) Inverse 1D transform (floating-point form).
static int	setTemplate(Template t, int ord) General-purpose registration routine.
int	transform1D(double[] sample, int start, int len, double[] coef) Forward 1D transform (floating-point form).

Methods inherited from class cz.cuni.jagrlib.DefaultDiscreteTransform

inverse1D, inverse2D, inverse2D, loadData, storeData, transform1D, transform2D, transform2D

Methods inherited from class cz.cuni.jagrlib.Piece

className, connect, findPlug, findPlug, getInfo, getInterface, getInterface, getPlug, getReg, init, isCompatible, isCompatible, isConnected, logError, logWarning, myInterface, newInputPlug, newOptOutputPlug, newOutputPlug, newPlug, noTemplates, propBegin, propBounds, propDefault, propEnd, propEnum, propManipulator, propManipulator, setProgressListener, setRegStrings, setTemplateDynamic, stop

Methods inherited from class cz.cuni.jagrlib.DefaultProperty

booleanProperty, booleanProperty, colorDoubleProperty, colorProperty, commit, doubleProperty, doubleProperty, doubleProperty, enumProperty, floatProperty, floatProperty, floatProperty, get, intProperty, intProperty, intProperty, longProperty, longProperty, longProperty, set, set, stringProperty

Methods inherited from class java.lang.Object

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

Methods inherited from interface cz.cuni.jagrlib.iface.Property

commit, get, set

Field Detail

base

protected double[][] base

Transform bases for last computed transform sizes (accelerator).

len

protected int[] len

Last computed transform sizes (accelerator).

last

protected int last

Last cache to be recycled (0 or 1.

tmpD

protected double[] tmpD

Temporary array for in-place transforms.

reg

public static final RegPiece reg

Static registration instance for this class. Automatically initialized in class-loading time.

Constructor Detail

DCT

public DCT()

Method Detail

assertBase

protected double[] assertBase(int l)

Computes base matrix for the given size.

getSizeBounds

public boolean getSizeBounds(int[] bounds)

Get extreme domain (source) ranges.

Specified by:

getSizeBounds in interface DiscreteTransform

Overrides:

getSizeBounds in class DefaultDiscreteTransform

Parameters:

bounds - Pre-allocated array to hold extreme ranges:
bounds[0] .. minimum size in 1st dim,
bounds[1] .. maximum size in 1st dim,
bounds[2] .. minimum size in 2nd dim,
bounds[3] .. maximum size in 2nd dim, etc.

Returns:

true if arbitrary lengths are allowed (even non-powers-ow-two).

transform1D

public int transform1D(double[] sample,
                       int start,
                       int len,
                       double[] coef)

Forward 1D transform (floating-point form). Has to be used if source and/or target data are floating-point!

Specified by:

transform1D in interface DiscreteTransform

Overrides:

transform1D in class DefaultDiscreteTransform

Parameters:

sample - Source array (containing sample data).

start - Starting index of the transformed segment.

len - Source segment length.

coef - Pre-allocated array to hold transformed data (coefficients).

Returns:

Number of coefficients (0 in case of error).

See Also:

inverse1D(double[],int,double[],int), DefaultDiscreteTransform.transform1D(int[],int,int,int[])

inverse1D

public int inverse1D(double[] coef,
                     int len,
                     double[] sample,
                     int start)

Inverse 1D transform (floating-point form). Inverse mapping to transform1D(double[],int,int,double[]).

Specified by:

inverse1D in interface DiscreteTransform

Overrides:

inverse1D in class DefaultDiscreteTransform

Parameters:

coef - Source array (holding coefficients).

len - Number of coefficients.

sample - Pre-allocated array to hold reconstructed sample data.

start - Starting index of the reconstructed sample data.

Returns:

Sample data length (0 in case of error).

See Also:

transform1D(double[],int,int,double[]), DefaultDiscreteTransform.inverse1D(int[],int,int[],int)

setTemplate

public static int setTemplate(Template t,
                              int ord)

General-purpose registration routine. Sets all plugs, strings, etc. to the given Template.