Documentation of 'edu.emory.mathcs.jtransforms.dht.DoubleDHT_2D' Java class
DoubleDHT_2D
Skip navigation links
edu.emory.mathcs.jtransforms.dht

Class DoubleDHT_2D


  • public class DoubleDHT_2D
extends java.lang.Object
    Computes 2D Discrete Hartley Transform (DHT) of real, double precision data. The sizes of both dimensions can be arbitrary numbers. This is a parallel implementation 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

      Constructors 
      Constructor and Description
      DoubleDHT_2D(int rows, int column)
      Creates new instance of DoubleDHT_2D.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method and Description
      void forward(double[] a)
      Computes 2D real, forward DHT leaving the result in a.
      void forward(double[][] a)
      Computes 2D real, forward DHT leaving the result in a.
      void inverse(double[][] a, boolean scale)
      Computes 2D real, inverse DHT leaving the result in a.
      void inverse(double[] a, boolean scale)
      Computes 2D real, inverse DHT leaving the result in a.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • DoubleDHT_2D

        public DoubleDHT_2D(int rows,
                    int column)
        Creates new instance of DoubleDHT_2D.
        Parameters:
        rows - number of rows
        column - number of columns

    • Method Detail

      • forward

        public void forward(double[] a)
        Computes 2D real, forward DHT leaving the result in a. The data is stored in 1D array in row-major order.
        Parameters:
        a - data to transform

      • forward

        public void forward(double[][] a)
        Computes 2D real, forward DHT leaving the result in a. The data is stored in 2D array.
        Parameters:
        a - data to transform

      • inverse

        public void inverse(double[] a,
                    boolean scale)
        Computes 2D real, inverse DHT 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(double[][] a,
                    boolean scale)
        Computes 2D real, inverse DHT leaving the result in a. The data is stored in 2D array.
        Parameters:
        a - data to transform
        scale - if true then scaling is performed
Skip navigation links

DMelt 3.0 © DataMelt by jWork.ORG

You see the box below because you did not login.