Research and Development 1/^Archief/2008-2009/Gezichts detectie/Onderzoek/NNBFD/bestanden/Matrix.java

<source lang=java> /**

* 
*/

package nl.ru.rd.facedetection.nnbfd;

import java.awt.image.BufferedImage; import java.awt.image.WritableRaster;

/**

* A mathematical object generally represented as an array of numbers.
* 
* @author Christiaan Thijssen s0814970
* @author Kevin Reintjes s0814954
* @author Wouter Geraedts (s0814857 - wgeraedts) PGP 66AA5935
*/

public class Matrix { /** * Internal matrix storage. */ // Because of design choices in Java, we're using short and not bytes (no unsigned bytes) private short[][] matrix;

/** * Creates a matrix with a specified width and height Method does not instantiate cells. * * @param width * @param height */ public Matrix(int width, int height) { this.matrix = new short[width][height]; }

/** * Makes a 1:1 copy of the specified source matrix. * * @param source * The matrix to be copied. */ public Matrix(Matrix source) { int height = source.getHeight(); int width = source.getWidth();

this.matrix = new short[width][height]; for(int x = 0; x < width; x++) for(int y = 0; y < height; y++) this.matrix[x][y] = source.getValue(x, y); }

/** * @return Height of the matrix. */ public int getHeight() { if(this.getWidth() == 0) return 0;

return this.matrix[0].length; }

/** * @return Width of the matrix. */ public int getWidth() { return this.matrix.length; }

/** * Gets the value of the specified matrixcell. * * @param x * Column of the cell from which to get the value. * @param y * Row of the cell from which to get the value. * @return The value of the specified cell. */ public short getValue(int x, int y) { return this.matrix[x][y]; }

/** * Sets the value of the specified matrixcell * * @param x * Column of the cell from which to set the value. * @param y * Row of the cell from which to set the value. * @param value * The value for the specified cell. */ public void setValue(int x, int y, short value) { this.matrix[x][y] = value; }

/** * Convert the matrix to a grayscale BufferedImage. * * @return A grayscale bufferdImage created from the cellvalues of this Matrix. */ public BufferedImage toImage() { int width = this.getWidth(); int height = this.getHeight();

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY); WritableRaster raster = image.getRaster();

for(int x = 0; x < width; x++) for(int y = 0; y < height; y++) raster.setSample(x, y, 0, this.getValue(x, y));

return image; } }

</source>