Package org.opentrafficsim.core.egtf

Class Convolution

  • public final class Convolution
extends java.lang.Object
    Utility class for convolution using fast fourier transformation. This utility is specifically tailored to EGTF and not for general fast fourier purposes.

    Copyright (c) 2013-2020 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
    BSD-style license. See OpenTrafficSim License.

    Version:
    $Revision$, $LastChangedDate$, by $Author$, initial version 31 okt. 2018
    Author:
    Alexander Verbraeck, Peter Knoppers, Wouter Schakel

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static double[][] convolution​(double[][] a, double[][] b)
      Convolution of two matrices using fast fourier transform.
      static void main​(java.lang.String... args)
      Program entry point.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • main

        public static void main​(java.lang.String... args)
        Program entry point.
        Parameters:
        args - String...; the command line arguments (not used)

      • convolution

        public static double[][] convolution​(double[][] a,
                                     double[][] b)
        Convolution of two matrices using fast fourier transform.
        Parameters:
        a - double[][]; the kernel matrix
        b - double[][]; the data matrix
        Returns:
        double[][]; convolution of a over b, same size as b