/*
* Copyright 2004-2010 Information & Software Engineering Group (188/1)
* Institute of Software Technology and Interactive Systems
* Vienna University of Technology, Austria
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.ifs.tuwien.ac.at/dm/somtoolbox/license.html
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package at.tuwien.ifs.somtoolbox.visualization;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.StringTokenizer;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import at.tuwien.ifs.somtoolbox.SOMToolboxException;
import at.tuwien.ifs.somtoolbox.data.InputData;
import at.tuwien.ifs.somtoolbox.data.SOMVisualisationData;
import at.tuwien.ifs.somtoolbox.layers.LayerAccessException;
import at.tuwien.ifs.somtoolbox.layers.Unit;
import at.tuwien.ifs.somtoolbox.layers.quality.QualityMeasureNotFoundException;
import at.tuwien.ifs.somtoolbox.layers.quality.TopographicProduct;
import at.tuwien.ifs.somtoolbox.models.GrowingSOM;
/**
* Visualization of some aspects of the Topographic Product Quality Measure, computation in {@link TopographicProduct}<br>
* Notes: Only the measure relating to the Units will be drawn
*
* @author Gerd Platzgummer
* @version $Id: TopographicProductVisualizer.java 3587 2010-05-21 10:35:33Z mayer $
*/
public class TopographicProductVisualizer extends AbstractBackgroundImageVisualizer implements QualityMeasureVisualizer {
private TopographicProduct tp = null;
public TopographicProductVisualizer() {
NUM_VISUALIZATIONS = 1;
VISUALIZATION_NAMES = new String[] { "Topographic Product" };
VISUALIZATION_SHORT_NAMES = new String[] { "TopographicProduct" };
VISUALIZATION_DESCRIPTIONS = new String[] { "Topographic Product of a given k- Result mapped on the corresponding Map Units of the trained SOM.\n"
+ "H.U. Bauer and K.R. Pawelzik. Quantifying the neighborhood preservation of self- organizing feature maps\n"
+ "In: IEEE Transactions on Neural Networks 3, pages 570-579, 1992" };
neededInputObjects = new String[] { SOMVisualisationData.INPUT_VECTOR /* , SOMVisualisationData.QM_CACHE_FILE */};
}
@Override
public BufferedImage createVisualization(int index, GrowingSOM gsom, int width, int height)
throws SOMToolboxException {
// InputData data = null;
// String cachefile = fileNames[1]; // cachefile auslesen, kann auch null sein wenn nicht angegeben vom user
// fileNames[1] = null; // l�schen, damit das Popupfenster wieder kommt
// setFileName(1, null); // nouamoll
// if (cachefile == null) // kein Cachefile angegeben, daher neu berechnen
// {
// if (tp == null) {
// if (fileNames[0] != null) {
// InputData data = new SOMLibSparseInputData(fileNames[0], true, true, 1, 7);
String cachefile = null;
if (gsom.getSharedInputObjects().getData(neededInputObjects[0]) == null) {
throw new SOMToolboxException("You need to specify " + neededInputObjects[0]);
}
InputData data = gsom.getSharedInputObjects().getInputData();
tp = new TopographicProduct(gsom.getLayer(), data);
return createTPImage(gsom, width, height, cachefile);
}
private BufferedImage createTPImage(GrowingSOM gsom, int width, int height, String cachefile) {
double[][] unitquals = null;
if (cachefile == null) {
try {
String k = (String) JOptionPane.showInputDialog(null, "K=:\n", "Customized Dialog",
JOptionPane.PLAIN_MESSAGE, null, null, null);
unitquals = tp.getUnitQualities("TP_Unit|" + k);
} catch (QualityMeasureNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
unitquals = readFromCacheFile(gsom, cachefile);
}
return createImage(gsom, width, height, unitquals);
}
/** Generates a visualisation with a fixed k */
public BufferedImage createTPImage(GrowingSOM gsom, int width, int height, int k) {
double[][] unitquals = null;
tp = new TopographicProduct(gsom.getLayer(), gsom.getSharedInputObjects().getInputData());
try {
unitquals = tp.getUnitQualities("TP_Unit|" + k);
} catch (QualityMeasureNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return createImage(gsom, width, height, unitquals);
}
private BufferedImage createImage(GrowingSOM gsom, int width, int height, double[][] unitquals) {
double maxTP = Double.MIN_VALUE;
double minTP = Double.MAX_VALUE;
for (int j = 0; j < gsom.getLayer().getYSize(); j++) {
for (int i = 0; i < gsom.getLayer().getXSize(); i++) {
Unit u = null;
try {
u = gsom.getLayer().getUnit(i, j);
} catch (LayerAccessException e) {
Logger.getLogger("at.tuwien.ifs.somtoolbox").severe(e.getMessage());
System.exit(-1);
}
// if (u.getNumberOfMappedInputs()>0) {
if (unitquals[u.getXPos()][u.getYPos()] > maxTP) {
maxTP = unitquals[u.getXPos()][u.getYPos()];
}
if (unitquals[u.getXPos()][u.getYPos()] < minTP) {
minTP = unitquals[u.getXPos()][u.getYPos()];
}
// }
}
}
BufferedImage res = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = (Graphics2D) res.getGraphics();
int unitWidth = width / gsom.getLayer().getXSize();
int unitHeight = height / gsom.getLayer().getYSize();
double ci = 0;
for (int y = 0; y < gsom.getLayer().getYSize(); y++) {
for (int x = 0; x < gsom.getLayer().getXSize(); x++) {
Unit u = null;
try {
u = gsom.getLayer().getUnit(x, y);
} catch (LayerAccessException e) {
Logger.getLogger("at.tuwien.ifs.somtoolbox").severe(e.getMessage());
System.exit(-1);
}
// if (u.getNumberOfMappedInputs()>0) {
// ci = (int) (((unitquals[u.getXPos()][u.getYPos()]-minTP)/(maxTP-minTP))*255) ;
// g.setPaint (new Color(0, 255-ci, 255-ci));
ci = 1.0 - ((unitquals[u.getXPos()][u.getYPos()] - minTP) / (maxTP - minTP) * 0.6 + 0.2);
g.setPaint(new Color(Color.HSBtoRGB((float) 0.87, (float) 0.5, (float) ci)));// H-value==color==blue
// } else {
// g.setPaint(Color.WHITE);
// }
g.setColor(null);
g.fill(new Rectangle(x * unitWidth, y * unitHeight, unitWidth, unitHeight));
}
}
return res;
}
private double[][] readFromCacheFile(GrowingSOM gsom, String cachefile) {
double[][] unitquals;
unitquals = new double[gsom.getLayer().getXSize()][gsom.getLayer().getYSize()];
// aus Cachefile auslesen
try {
BufferedReader br = new BufferedReader(new FileReader(cachefile));
String line = null;
int y = 0;
while ((line = br.readLine()) != null) {
if (line.trim() != "") {
StringTokenizer st = new StringTokenizer(line);
int x = 0;
while (st.hasMoreTokens()) {
unitquals[x][y] = Double.parseDouble(st.nextToken());
x++;
}
y++;
}
}
br.close();
} catch (Exception ex) {
}
return unitquals;
}
// }
}