FloatDCT_2D (math 11.1.0 API)

java.lang.Object
- de.gsi.math.spectra.dct.FloatDCT_2D

```
public class FloatDCT_2D
extends java.lang.Object
```
Computes 2D Discrete Cosine Transform (DCT) of single precision data. The sizes of both dimensions can be arbitrary numbers. This is a parallel implementation of split-radix and mixed-radix algorithms optimized for SMP systems.

Part of the code is derived from General Purpose FFT Package written by Takuya Ooura (http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html)

Author:

Piotr Wendykier (piotr.wendykier@gmail.com)

Constructor Summary

Constructors
Constructor Description

FloatDCT_2D(int rows, int columns)
Creates new instance of FloatDCT_2D.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`forward(float[][] a, boolean scale)`	Computes 2D forward DCT (DCT-II) leaving the result in `a`.
`void`	`forward(float[] a, boolean scale)`	Computes 2D forward DCT (DCT-II) leaving the result in `a`.
`void`	`inverse(float[][] a, boolean scale)`	Computes 2D inverse DCT (DCT-III) leaving the result in `a`.
`void`	`inverse(float[] a, boolean scale)`	Computes 2D inverse DCT (DCT-III) leaving the result in `a`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FloatDCT_2D
```
public FloatDCT_2D(int rows,
                   int columns)
```
    Creates new instance of FloatDCT_2D.
    
    Parameters:
    
    rows - number of rows
    
    columns - number of columns
- Method Detail
  - forward
```
public void forward(float[] a,
                    boolean scale)
```
    Computes 2D forward DCT (DCT-II) leaving the result in a. The data is stored in 1D array in row-major order.
    
    Parameters:
    
    a - data to transform
    
    scale - if true then scaling is performed
  - forward
```
public void forward(float[][] a,
                    boolean scale)
```
    Computes 2D forward DCT (DCT-II) leaving the result in a. The data is stored in 2D array.
    
    Parameters:
    
    a - data to transform
    
    scale - if true then scaling is performed
  - inverse
```
public void inverse(float[] a,
                    boolean scale)
```
    Computes 2D inverse DCT (DCT-III) leaving the result in a. The data is stored in 1D array in row-major order.
    
    Parameters:
    
    a - data to transform
    
    scale - if true then scaling is performed
  - inverse
```
public void inverse(float[][] a,
                    boolean scale)
```
    Computes 2D inverse DCT (DCT-III) leaving the result in a. The data is stored in 2D array.
    
    Parameters:
    
    a - data to transform
    
    scale - if true then scaling is performed