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java.lang.Objectmath.jtransforms.dct.FloatDCT_3D
public class FloatDCT_3D
Computes 3D Discrete Cosine Transform (DCT) of single precision data. The
sizes of all three dimensions can be arbitrary numbers. This is a parallel
implementation of split-radix and mixed-radix algorithms optimized for SMP
systems.
Part of code is derived from General Purpose FFT Package written by Takuya Ooura
(http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html)
Constructor Summary | |
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FloatDCT_3D(int slices,
int rows,
int columns)
Creates new instance of FloatDCT_3D. |
Method Summary | |
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void |
forward(float[][][] a,
boolean scale)
Computes the 3D forward DCT (DCT-II) leaving the result in a
. |
void |
forward(float[] a,
boolean scale)
Computes the 3D forward DCT (DCT-II) leaving the result in a
. |
void |
inverse(float[][][] a,
boolean scale)
Computes the 3D inverse DCT (DCT-III) leaving the result in a . |
void |
inverse(float[] a,
boolean scale)
Computes the 3D inverse DCT (DCT-III) leaving the result in a . |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public FloatDCT_3D(int slices, int rows, int columns)
slices
- number of slicesrows
- number of rowscolumns
- number of columnsMethod Detail |
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public void forward(float[] a, boolean scale)
a
. The data is stored in 1D array addressed in slice-major, then
row-major, then column-major, in order of significance, i.e. the element
(i,j,k) of 3D array x[slices][rows][columns] is stored in a[i*sliceStride
+ j*rowStride + k], where sliceStride = rows * columns and rowStride =
columns.
a
- data to transformscale
- if true then scaling is performedpublic void forward(float[][][] a, boolean scale)
a
. The data is stored in 3D array
a
- data to transformscale
- if true then scaling is performedpublic void inverse(float[] a, boolean scale)
a
. The data is stored in 1D array addressed in slice-major,
then row-major, then column-major, in order of significance, i.e. the
element (i,j,k) of 3D array x[slices][rows][columns] is stored in
a[i*sliceStride + j*rowStride + k], where sliceStride = rows * columns
and rowStride = columns.
a
- data to transformscale
- if true then scaling is performedpublic void inverse(float[][][] a, boolean scale)
a
. The data is stored in 3D array.
a
- data to transformscale
- if true then scaling is performed
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