import java.lang.*; import java.util.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.io.*; import java.awt.image.*; import java.awt.color.*; public class histogram extends operator1DInt{ /** * This class is used to display the histogram of an image with * horizontal and vertical axis */ public class HistCanvas extends NoScaleImageCanvas { int w; int h; public HistCanvas (Image i, int width, int height) { super(i); w = width; h = height; } public void paint(Graphics graphics) { super.paint(graphics); // Vertical line graphics.setColor(Color.red); graphics.drawLine(0,0,0,255); graphics.drawLine(0,0,10,0); graphics.drawLine(0,64,5,64); graphics.drawLine(0,128,10,128); graphics.drawLine(0,192,5,192); graphics.drawLine(0,256,10,256); int a = 0; int b = h/4; int c = b+b; int d = b+c; int e = h; graphics.drawString(Integer.toString(e),0,15); //graphics.drawString(Integer.toString(d),0,74); graphics.drawString(Integer.toString(c),10,140); //graphics.drawString(Integer.toString(b),0,202); graphics.drawString(Integer.toString(a),5,250); // Horizontal line graphics.setColor(Color.red); graphics.drawLine(0,255,255,255); graphics.drawLine(0,255,0,245); graphics.drawLine(64,255,64,250); graphics.drawLine(128,255,128,245); graphics.drawLine(192,255,192,250); graphics.drawLine(256,255,256,245); int aa = 0; int bb = w/4; int cc = bb+bb; int dd = bb+cc; int ee = w; graphics.drawString(Integer.toString(aa),5,240); //graphics.drawString(Integer.toString(bb),58,240); graphics.drawString(Integer.toString(cc),123,240); //graphics.drawString(Integer.toString(dd),180,240); graphics.drawString(Integer.toString(ee),230,240); } } image1DInt temp; static int number=0; String type = new String("IntensityHistogram"); HistCanvas dest_canvas; JButton applyButton; JLabel maxLabel; JLabel peakLabel; JPanel bottompanel; JLabel rescaleLabel; JTextField rescaleText; JLabel spaceText; int histpeak; double histmaximum; int scaleMax; int val; //histogram label. A bit artificial for 256x256 images... JLabel hist_range = new JLabel("0 64"+ " 128"+ " 192"+ " 256"); Histogram histogramAlgorithm = new Histogram();; int [] hist_1d; Image hist; public histogram(){ } public histogram(JPanel panel, linkData links){ ++number; setName(type+"_"+number); setParameters(); setType(type); setBox(panel,links,1,1); } /** * Returns a String representing all the parameters for this operator * for the purpose of saving the system setup (and being able to load * it again at a future date). */ public String saveParameters(){ String saveData = new String(); //Add any parameters to the string saveData = rescaleText.getText(); return saveData; } /** *Used to load all the parameters for this particular operator and reset the *interface so that it contains these loaded parameters */ public void loadParameters(StreamTokenizer tokenizer) throws IOException{ //Grab the parameters int tokenType; tokenType = tokenizer.nextToken(); scaleMax = (int) tokenizer.nval; rescaleText.setText(String. valueOf(scaleMax)); //Repack the components in the interface parameters.pack(); parameters.setVisible(false); } void setParameters(){ /** *This function is used to set up the parameters window. This window *should contain enough parameters to be able to run the operator *although parameters like scaling and offset are not required as there *is an operator already defined to do this. The interface components *should be added to the parameters frame. In this example a single panel *is created which is used to hold a label saying there are no paramters. *In general this will not be true of most operators. */ parameters = new JFrame(name); panel = new JPanel(); panel.setLayout(new BorderLayout()); bottompanel = new JPanel(); bottompanel.setLayout(new BorderLayout()); panel.add(bottompanel,"South"); rescaleLabel = new JLabel("New maximum for histogram scaling:"); rescaleText = new JTextField(5); rescaleText. setText("-1"); spaceText = new JLabel(" "); panel.add(spaceText, "West"); JPanel topPanel = new JPanel(); JButton applyButton = new JButton("Apply scaling"); topPanel.add(rescaleLabel); topPanel.add(rescaleText); topPanel.add(applyButton); applyButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ scale(); } }); panel.add(topPanel,"North"); //Add the main panel parameters.getContentPane().add(panel); parameters.pack(); parameters.setVisible(false); } public void go(){ System.out.println(name); if(getInput1()!=null){ // analyse image int [] rawpixels; rawpixels = imageConversions.gs2pix(input1.getValues()); histpeak = histogramAlgorithm.peak(rawpixels, input1.getWidth(),input1.getHeight()); histmaximum = histogramAlgorithm.maximum(rawpixels, input1.getWidth(),input1.getHeight()); //System.out.println("peak+max: "+histpeak+" "+histmaximum); // reset image scaling if nothing previously set if (new Double(rescaleText.getText()).doubleValue() < 0) { // need to find max for first scaling scaleMax = (int) histmaximum; rescaleText. setText(String. valueOf(scaleMax)); } // make histogram int [] histpixels; histpixels = histogramAlgorithm.histogramScale(rawpixels, input1.getWidth(),input1.getHeight(),scaleMax); hist = parameters.createImage(new MemoryImageSource(256,256,histpixels,0,256)); updateDisplay(); output1 = new image1DInt(input1.getWidth(),input1.getHeight(), input1.getValues()); System.out.println("Output Width 1 "+getOutput1().getWidth()); propagate(); } } void updateDisplay(){ if (dest_canvas != null) { panel.remove(dest_canvas); } dest_canvas = new HistCanvas(hist,256,scaleMax); panel.add(dest_canvas, "Center"); if (peakLabel != null) { bottompanel.remove(peakLabel); } peakLabel = new JLabel("Peak position: "+histpeak); bottompanel.add(peakLabel,"North"); if (maxLabel != null) { bottompanel.remove(maxLabel); } maxLabel = new JLabel("Maximum value: "+(int)histmaximum); bottompanel.add(maxLabel,"South"); parameters.pack(); updateParameters(); } void scale() { int [] pixels; // get rescale parameter try { scaleMax = (int) new Double(rescaleText.getText()).doubleValue(); } catch(NumberFormatException e){ JOptionPane.showMessageDialog(null,("Wrong Format for scale"),("Error!"), JOptionPane.WARNING_MESSAGE); return; } if (scaleMax <= 0) { JOptionPane.showMessageDialog(null,("Scale value must be positive"),("Error!"), JOptionPane.WARNING_MESSAGE); return; } pixels = histogramAlgorithm.histogramScale(imageConversions.gs2pix(input1.getValues()),input1.getWidth(),input1.getHeight(),scaleMax); hist = parameters.createImage(new MemoryImageSource(256,256,pixels,0,256)); if (dest_canvas != null) { panel.remove(dest_canvas); } dest_canvas = new HistCanvas(hist,256,scaleMax); panel. add(dest_canvas,"Center"); parameters.pack(); updateParameters(); } }