OpenCV_Apply_Color_Map.java
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*;
import java.awt.image.BufferedImage;
public class OpenCV_Apply_Color_Map {
static {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
}
private JFrame frmjavaSwing;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
OpenCV_Apply_Color_Map window = new OpenCV_Apply_Color_Map();
window.frmjavaSwing.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public OpenCV_Apply_Color_Map() {
initialize();
System.out.println( "Imgproc.COLORMAP_AUTUMN="+Imgproc.COLORMAP_AUTUMN);
System.out.println( "Imgproc.COLORMAP_BONE="+Imgproc.COLORMAP_BONE);
System.out.println( "Imgproc.COLORMAP_COOL="+Imgproc.COLORMAP_COOL);
System.out.println( "Imgproc.COLORMAP_HOT="+Imgproc.COLORMAP_HOT);
System.out.println( "Imgproc.COLORMAP_HSV="+Imgproc.COLORMAP_HSV);
System.out.println( "Imgproc.COLORMAP_JET="+Imgproc.COLORMAP_JET);
System.out.println( "Imgproc.COLORMAP_OCEAN="+Imgproc.COLORMAP_OCEAN);
System.out.println( "Imgproc.COLORMAP_PARULA="+Imgproc.COLORMAP_PARULA);
System.out.println( "Imgproc.COLORMAP_PINK="+Imgproc.COLORMAP_PINK);
System.out.println( "Imgproc.COLORMAP_RAINBOW="+Imgproc.COLORMAP_RAINBOW);
System.out.println( "Imgproc.COLORMAP_SPRING="+Imgproc.COLORMAP_SPRING);
System.out.println( "Imgproc.COLORMAP_SUMMER="+Imgproc.COLORMAP_SUMMER);
System.out.println( "Imgproc.COLORMAP_WINTER="+ Imgproc.COLORMAP_WINTER);
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
final Mat source = Imgcodecs.imread(
"D:\\projects\\Java\\OpenCV_Samples\\resource\\imgs\\clean.jpg ", Imgcodecs.CV_LOAD_IMAGE_GRAYSCALE);
//BufferedImage image=matToBufferedImage(applyColorMap(source,alpha));
frmjavaSwing = new JFrame();
frmjavaSwing.setTitle("Java Swing window");
frmjavaSwing.setBounds(100, 100, 520, 550);
frmjavaSwing.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frmjavaSwing.getContentPane().setLayout(null);
final JLabel showAlphaValue = new JLabel("2");
showAlphaValue.setBounds(311, 20, 46, 15);
frmjavaSwing.getContentPane().add(showAlphaValue);
final JLabel lblNewLabel = new JLabel("");
lblNewLabel.setBounds(10, 68, 438, 438);
//lblNewLabel.setIcon(new ImageIcon(image));
frmjavaSwing.getContentPane().add(lblNewLabel);
final JSlider slider_alpha = new JSlider();
slider_alpha.setMaximum(12);
slider_alpha.setValue(2);
slider_alpha.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent arg0) {
//System.out.println(slider_alpha.getValue());
showAlphaValue.setText(slider_alpha.getValue()+"");
BufferedImage newImage=matToBufferedImage(applyColorMap(source,slider_alpha.getValue()));
lblNewLabel.setIcon(new ImageIcon(newImage));
}
});
slider_alpha.setBounds(101, 10, 200, 25);
frmjavaSwing.getContentPane().add(slider_alpha);
JLabel lblAlpha = new JLabel("ColorMap");
lblAlpha.setBounds(10, 20, 92, 15);
frmjavaSwing.getContentPane().add(lblAlpha);
}
public Mat applyColorMap(Mat source,int colormap){
Mat destination=new Mat(source.rows(),source.cols(),source.type());
Imgproc.applyColorMap(source, destination, colormap);
return destination;
}
public BufferedImage matToBufferedImage(Mat matrix) {
int cols = matrix.cols();
int rows = matrix.rows();
int elemSize = (int)matrix.elemSize();
byte[] data = new byte[cols * rows * elemSize];
int type;
matrix.get(0, 0, data);
switch (matrix.channels()) {
case 1:
type = BufferedImage.TYPE_BYTE_GRAY;
break;
case 3:
type = BufferedImage.TYPE_3BYTE_BGR;
// bgr to rgb
byte b;
for(int i=0; i<data.length; i=i+3) {
b = data[i];
data[i] = data[i+2];
data[i+2] = b;
}
break;
default:
return null;
}
BufferedImage image2 = new BufferedImage(cols, rows, type);
image2.getRaster().setDataElements(0, 0, cols, rows, data);
return image2;
}
}
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