mpi/fruitfly/general/ArrayConverter.java

   1 package mpi.fruitfly.general;
   2
   3 /**
   4  * <p>Title: </p>
   5  *
   6  * <p>Description: </p>
   7  *
   8  * <p>Copyright: Copyright (c) 2006</p>
   9  *
  10  * <p>Company: </p>
  11  *
  12  * @author not attributable
  13  * @version 1.0
  14  */
  15
  16 public class ArrayConverter
  17 {
  18     public static float[] twoDimArrayToOneDimArray(float[][] filter)
  19     {
  20         float[] result = new float[filter.length * filter[0].length];
  21
  22         for (int y = 0; y < filter[0].length; y++)
  23             for (int x = 0; x < filter.length; x++)
  24                 result[x + filter.length*y] = filter[x][y];
  25
  26         return result;
  27     }
  28
  29     public static double[] twoDimArrayToOneDimArray(double[][] filter)
  30     {
  31         double[] result = new double[filter.length * filter[0].length];
  32
  33         for (int y = 0; y < filter[0].length; y++)
  34             for (int x = 0; x < filter.length; x++)
  35                 result[x + filter.length*y] = filter[x][y];
  36
  37         return result;
  38     }
  39
  40     public static double[][] oneDimArrayToTwoDimArray(double[] filter, int width, int height)
  41     {
  42         double[][] result = new double[width][height];
  43
  44         for (int y = 0; y < height; y++)
  45             for (int x = 0; x < width; x++)
  46                 result[x][y] = filter[x + width*y];
  47
  48         return result;
  49     }
  50
  51     // needed because matrix dimension is [row][column] which is the opposite of [x][y]!!!
  52     //
  53     public static double[][] oneDimArrayToTwoDimArrayInvert(double[] filter, int width /*columns*/, int height /*rows*/)
  54     {
  55         //                             row     column
  56         double[][] result = new double[height][width];
  57
  58         for (int row = 0; row < height; row++)
  59             for (int column = 0; column < width; column++)
  60                 result[row][column] = filter[column + width*row];
  61
  62         return result;
  63     }
  64
  65 }