More motion detection examples, refs #250

webcam-capture/src/example/java/DetectMotionEventsExample.java

@@ -0,0 +1,67 @@
+import java.io.IOException;
+
+import com.github.sarxos.webcam.Webcam;
+import com.github.sarxos.webcam.WebcamMotionDetector;
+import com.github.sarxos.webcam.WebcamResolution;
+
+
+/**
+ * The goal of this example is to demonstrate the idea behind detecting that
+ * motion has stopped.
+ * 
+ * @author Bartosz Firyn (sarxos)
+ */
+public class DetectMotionEventsExample {
+
+	Webcam webcam;
+	WebcamMotionDetector detector;
+
+	public DetectMotionEventsExample() {
+
+		webcam = Webcam.getDefault();
+		webcam.setViewSize(WebcamResolution.VGA.getSize());
+
+		detector = new WebcamMotionDetector(webcam);
+		detector.setInterval(200); // one check per 200 ms
+		detector.setInertia(2000); // keep "motion" state for 2 seconds
+		detector.start();
+
+		Thread t = new Thread("motion-printer") {
+
+			@Override
+			public void run() {
+
+				boolean motion = false;
+				long now = 0;
+
+				while (true) {
+					now = System.currentTimeMillis();
+					if (detector.isMotion()) {
+						if (!motion) {
+							motion = true;
+							System.out.println(now + " MOTION STARTED");
+						}
+					} else {
+						if (motion) {
+							motion = false;
+							System.out.println(now + " MOTION STOPPED");
+						}
+					}
+					try {
+						Thread.sleep(50); // must be smaller than interval
+					} catch (InterruptedException e) {
+						e.printStackTrace();
+					}
+				}
+			}
+		};
+
+		t.setDaemon(true);
+		t.start();
+	}
+
+	public static void main(String[] args) throws IOException {
+		new DetectMotionEventsExample();
+		System.in.read(); // keep program open
+	}
+}

webcam-capture/src/example/java/DetectMotionExample2.java

@@ -40,7 +40,7 @@ public void run() {
 	}
 
 	public static void main(String[] args) throws IOException {
-		new DetectMotionExample();
+		new DetectMotionExample2();
 		System.in.read(); // keep program open
 	}
 }

webcam-capture/src/example/java/DetectMotionExample3.java

@@ -10,6 +10,7 @@
 import com.github.sarxos.webcam.Webcam;
 import com.github.sarxos.webcam.WebcamMotionDetector;
 import com.github.sarxos.webcam.WebcamPanel;
+import com.github.sarxos.webcam.WebcamResolution;
 
 
 /**
@@ -24,18 +25,18 @@ public class DetectMotionExample3 extends JFrame implements WebcamPanel.Painter
 
 	private final Webcam webcam;
 	private final WebcamPanel panel;
-	private final WebcamPanel.Painter painter;
 	private final WebcamMotionDetector detector;
 
 	public DetectMotionExample3() {
 
-		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 		setTitle("Motion Detector Demo");
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 		webcam = Webcam.getDefault();
+		webcam.setViewSize(WebcamResolution.VGA.getSize());
+		webcam.open(true);
 
 		panel = new WebcamPanel(webcam, false);
-		painter = panel.getPainter(); // store default painter
 		panel.setPainter(this);
 		panel.start();
 
@@ -56,7 +57,7 @@ public static void main(String[] args) throws IOException {
 
 	@Override
 	public void paintPanel(WebcamPanel panel, Graphics2D g2) {
-		painter.paintPanel(panel, g2);
+		panel.getDefaultPainter().paintPanel(panel, g2);
 	}
 
 	@Override
@@ -80,6 +81,6 @@ public void paintImage(WebcamPanel panel, BufferedImage image, Graphics2D g2) {
 
 		g.dispose();
 
-		painter.paintImage(panel, image, g2);
+		panel.getDefaultPainter().paintImage(panel, image, g2);
 	}
 }