webcamfacedetect.FaceDetect.java Source code

Introduction

Here is the source code for webcamfacedetect.FaceDetect.java

Source

package webcamfacedetect;

/*
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 */

/**
 *
 * @author duo
 */
/*  
 * Captures the camera stream with OpenCV  
 * Search for the faces  
 * Display a circle around the faces using Java
 */
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import javax.swing.*;
import org.opencv.core.Mat;

class FaceDetect extends JPanel {

    private static final long serialVersionUID = 1L;
    private BufferedImage image;

    // Create a constructor method  
    public FaceDetect() {
        super();
    }

    /**
     * Converts/writes a Mat into a BufferedImage.
     *
     * @param matrix Mat of type CV_8UC3 or CV_8UC1
     * @return BufferedImage of type TYPE_3BYTE_BGR or TYPE_BYTE_GRAY
     */
    public boolean MatToBufferedImage(Mat matBGR) {
        long startTime = System.nanoTime();
        int width = matBGR.width(), height = matBGR.height(), channels = matBGR.channels();
        byte[] sourcePixels = new byte[width * height * channels];
        matBGR.get(0, 0, sourcePixels);
        // create new image and get reference to backing data  
        image = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
        final byte[] targetPixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
        System.arraycopy(sourcePixels, 0, targetPixels, 0, sourcePixels.length);
        long endTime = System.nanoTime();
        //System.out.println(String.format("Elapsed time: %.2f ms", (float) (endTime - startTime) / 1000000));
        return true;
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        if (this.image == null) {
            return;
        }
        g.drawImage(this.image, 10, 10, this.image.getWidth(), this.image.getHeight(), null);
    }
}