package ac.essex.ecj.util; 
 
import ac.essex.ecj.imaging.PixelLoader; 
 
/** 
 * <p/> 
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License 
 * as published by the Free Software Foundation; either version 2 
 * of the License, or (at your option) any later version, 
 * provided that any use properly credits the author. 
 * This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
 * GNU General Public License for more details at http://www.gnu.org 
 * </p> 
 * 
 * @author Olly Oechsle, University of Essex, Date: 18-Aug-2006 
 * @version 1.0 
 */ 
public class TrainingData { 
 
    public PixelLoader image; 
    public PixelLoader truth; 
 
    /** 
     * Initialises the Training Data with two images, one the actual training image itself 
     * and the second a truth "map" of 'correct' and 'incorrect' pixels. For the sake of 
     * simplicity, the map represents incorrect pixels as black (RGB: 0,0,0), and correct 
     * pixels as non-black pixels (although preferably white!) 
     * 
     * Both the images should be of the same dimensions, otherwise an exception is thrown, 
     */ 
    public TrainingData(PixelLoader image, PixelLoader truth) { 
 
        this.image = image; 
        this.truth = truth; 
 
        if ((image.getWidth() != truth.getWidth()) || (image.getHeight() != truth.getHeight())) { 
            throw new RuntimeException("Truth image and test image are not the same size."); 
        } 
 
    } 
 
    /** 
     * Returns whether a given pixel is correct or not. 
     */ 
    public boolean isExpected(int x, int y) { 
        return truth.getPixel(x, y) > 0; 
    } 
 
}