Module imagingbook.spectral

Package imagingbook.spectral.dct

Interface Dct2d.Double

All Superinterfaces:

Dct2d

All Known Implementing Classes:

Dct2dDirect.Double, Dct2dFast.Double

Enclosing interface:

Dct2d

public static interface Dct2d.Double
extends Dct2d

Sub-interface for 2D DCT implementations operating on double data.

Nested Class Summary

Nested classes/interfaces inherited from interface imagingbook.spectral.dct.Dct2d

Dct2d.Double, Dct2d.Float

Method Summary

Modifier and Type	Method	Description
default void	checkSize(double[][] A)
default void	extractCol(double[][] data, int u, double[] column)
default void	extractRow(double[][] data, int v, double[] row)
default void	forward(double[][] g)	Performs an "in-place" 2D DCT forward transformation on the supplied data.
Dct1d.Double	get1dDct(int size)	Returns a suitable 1D DCT of the specified size (double).
default void	insertCol(double[][] data, int u, double[] column)
default void	insertRow(double[][] data, int v, double[] row)
default void	inverse(double[][] G)	Performs an "in-place" 2D DCT inverse transformation on the supplied spectrum.
default void	transform(double[][] data, boolean forward)	Transforms the given 2D array 'in-place'.

Methods inherited from interface imagingbook.spectral.dct.Dct2d

getHeight, getWidth

Method Details

get1dDct

Dct1d.Double get1dDct(int size)

Returns a suitable 1D DCT of the specified size (double).

Parameters:

size - the size of the DCT

Returns:

a Dct1d.Double instance

forward

default void forward(double[][] g)

Performs an "in-place" 2D DCT forward transformation on the supplied data. The input signal is replaced by the associated DCT spectrum.

Parameters:

g - the signal to be transformed (modified)

inverse

default void inverse(double[][] G)

Performs an "in-place" 2D DCT inverse transformation on the supplied spectrum. The input spectrum is replaced by the associated signal.

Parameters:

G - the spectrum to be transformed (modified)

transform

default void transform(double[][] data,
 boolean forward)

Transforms the given 2D array 'in-place'.

Parameters:

data - the input signal or spectrum (modified)

forward - forward transformation if true, inverse transformation if false

extractRow

default void extractRow(double[][] data,
 int v,
 double[] row)

insertRow

default void insertRow(double[][] data,
 int v,
 double[] row)

extractCol

default void extractCol(double[][] data,
 int u,
 double[] column)

insertCol

default void insertCol(double[][] data,
 int u,
 double[] column)

checkSize

default void checkSize(double[][] A)