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Add example to list in README, clean file format, refs #350
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@sarxos
sarxos committed Jul 20, 2015
1 parent 3eafb77 commit 36e1138
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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -129,6 +129,7 @@ Below are the very pretty basic examples demonstrating of how Webcam Capture API
* [How to save captured image in PNG / JPG / GIF / BMP etc](https://github.com/sarxos/webcam-capture/blob/master/webcam-capture/src/example/java/DifferentFileFormatsExample.java)
* [How to capture with many parallel threads](https://github.com/sarxos/webcam-capture/blob/master/webcam-capture/src/example/java/ConcurrentThreadsExample.java)
* [How to detect motion (text mode only)](https://github.com/sarxos/webcam-capture/blob/master/webcam-capture/src/example/java/DetectMotionExample.java)
* [How to perform multipoint motion detection](https://github.com/sarxos/webcam-capture/blob/master/webcam-capture/src/example/java/MultipointMotionDetectionExample.java)
* [How to display images from multiple IP cameras exposing pictures in JPG format](https://github.com/sarxos/webcam-capture/blob/master/webcam-capture-drivers/driver-ipcam/src/examples/java/JpegDasdingStudioExample.java)
* [How to display image from IP camera exposing MJPEG stream](https://github.com/sarxos/webcam-capture/blob/master/webcam-capture-drivers/driver-ipcam/src/examples/java/MjpegLignanoBeachExample.java)
* [How to use composite driver to display both, build-in and IP camera images](https://github.com/sarxos/webcam-capture/blob/master/webcam-capture-drivers/driver-ipcam/src/examples/java/DualNativeAndMjpegWebcamExample.java)
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241 changes: 131 additions & 110 deletions webcam-capture/src/example/java/MultipointMotionDetectionExample.java
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@@ -1,142 +1,163 @@
package com.github.sarxos.webcam;

import javax.swing.*;
import java.awt.*;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Stroke;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

public class MultipointMotionDetectionExample implements WebcamMotionListener, WebcamPanel.Painter {

public static void main(String[] args) throws InterruptedException {
new MultipointMotionDetectionExample();
}

private static final int INTERVAL = 100; // ms

public static Webcam webcam;
public static WebcamPanel.Painter painter = null;

public MultipointMotionDetectionExample(){
webcam = Webcam.getDefault();
webcam.setViewSize(WebcamResolution.VGA.getSize());

WebcamPanel panel = new WebcamPanel(webcam);
panel.setPreferredSize(WebcamResolution.VGA.getSize());
panel.setPainter(this);
panel.setFPSDisplayed(true);
panel.setFPSLimited(true);
panel.setFPSLimit(20);
panel.setPainter(this);
panel.start();

painter = panel.getDefaultPainter();
import javax.swing.JFrame;

JFrame window = new JFrame("Multipoint-motion detection");
window.add(panel);
window.setResizable(true);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.pack();
window.setVisible(true);
import com.github.sarxos.webcam.Webcam;
import com.github.sarxos.webcam.WebcamMotionDetector;
import com.github.sarxos.webcam.WebcamMotionEvent;
import com.github.sarxos.webcam.WebcamMotionListener;
import com.github.sarxos.webcam.WebcamPanel;
import com.github.sarxos.webcam.WebcamResolution;


WebcamMotionDetector detector = new WebcamMotionDetector(webcam);

//Sets the max amount of motion points to 300 and the minimum range between them to 40
detector.setMaxMotionPoints(300);
detector.setPointRange(40);

detector.setInterval(INTERVAL);
detector.addMotionListener(this);

detector.start();
}


//A HashMap to store all the current points and the current amount of times it has been rendered
//Time rendered is used to remove the point after a certain amount of time
public static HashMap<Point, Integer> motionPoints = new HashMap<Point, Integer>();

//Gets the motion points from the motion detector and adds it to the HashMap
@Override
public void motionDetected(WebcamMotionEvent wme) {
for(Point p : wme.getPoints()){
motionPoints.put(p, 0);
}
}
/**
* This is example demonstrating how to use multipoint motion detection feature.
*
* @author tm1990 (https://github.com/tm1990)
*/
public class MultipointMotionDetectionExample implements WebcamMotionListener, WebcamPanel.Painter {

@Override
public void paintPanel(WebcamPanel panel, Graphics2D g2) {
if (painter != null) {
painter.paintPanel(panel, g2);
}
}
public static void main(String[] args) throws InterruptedException {
new MultipointMotionDetectionExample();
}

private static final int INTERVAL = 100; // ms

public static Webcam webcam;
public static WebcamPanel.Painter painter = null;

//Used to render the effect for the motion points
private static final Stroke STROKE = new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1.0f, new float[] { 1.0f }, 0.0f);
public MultipointMotionDetectionExample() {

webcam = Webcam.getDefault();
webcam.setViewSize(WebcamResolution.VGA.getSize());

//The amount of time each point should be rendered for before being removed
public static final int renderTime = 3;
WebcamPanel panel = new WebcamPanel(webcam);
panel.setPreferredSize(WebcamResolution.VGA.getSize());
panel.setPainter(this);
panel.setFPSDisplayed(true);
panel.setFPSLimited(true);
panel.setFPSLimit(20);
panel.setPainter(this);
panel.start();

//The actual size of the rendered effect for each point
public static final int renderSize = 20;
painter = panel.getDefaultPainter();

@Override
public void paintImage(WebcamPanel panel, BufferedImage image, Graphics2D g2) {
JFrame window = new JFrame("Multipoint-motion detection");
window.add(panel);
window.setResizable(true);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.pack();
window.setVisible(true);

WebcamMotionDetector detector = new WebcamMotionDetector(webcam);

if (painter != null) {
painter.paintImage(panel, image, g2);
}
// Sets the max amount of motion points to 300 and the minimum range between them to 40
detector.setMaxMotionPoints(300);
detector.setPointRange(40);

//Gets all the points and updates the amount of time they have been rendered for
//And removes the ones that exceed the renderTime variable
detector.setInterval(INTERVAL);
detector.addMotionListener(this);

ArrayList<Point> rem = new ArrayList<Point>();
detector.start();
}

for (Map.Entry<Point, Integer> ent : motionPoints.entrySet()) {
Point p = ent.getKey();
/**
* A HashMap to store all the current points and the current amount of times it has been
* rendered. Time rendered is used to remove the point after a certain amount of time.
*/
public static HashMap<Point, Integer> motionPoints = new HashMap<Point, Integer>();

if (ent.getValue() != null) {
int tt = ent.getValue();
if (tt >= renderTime) {
rem.add(ent.getKey());
// Gets the motion points from the motion detector and adds it to the HashMap
@Override
public void motionDetected(WebcamMotionEvent wme) {
for (Point p : wme.getPoints()) {
motionPoints.put(p, 0);
}
}

} else {
int temp = ent.getValue() + 1;
motionPoints.put(p, temp);
}
@Override
public void paintPanel(WebcamPanel panel, Graphics2D g2) {
if (painter != null) {
painter.paintPanel(panel, g2);
}
}

}
}
/**
* Used to render the effect for the motion points.
*/
private static final Stroke STROKE = new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1.0f, new float[] { 1.0f }, 0.0f);

for(Point p : rem){
motionPoints.remove(p);
}
/**
* The amount of time each point should be rendered for before being removed.
*/
public static final int renderTime = 3;

/**
* The actual size of the rendered effect for each point.
*/
public static final int renderSize = 20;

//Gets all the remaining points after removing the exceeded ones and then renders the current ones as a red square
for(Map.Entry<Point, Integer> ent : motionPoints.entrySet()){
Point p = ent.getKey();
@Override
public void paintImage(WebcamPanel panel, BufferedImage image, Graphics2D g2) {

int xx = p.x - (renderSize / 2), yy = p.y - (renderSize / 2);
if (painter != null) {
painter.paintImage(panel, image, g2);
}

Rectangle bounds = new Rectangle(xx, yy, renderSize, renderSize);
// Gets all the points and updates the amount of time they have been rendered for
// And removes the ones that exceed the renderTime variable

int dx = (int) (0.1 * bounds.width);
int dy = (int) (0.2 * bounds.height);
int x = (int) bounds.x - dx;
int y = (int) bounds.y - dy;
int w = (int) bounds.width + 2 * dx;
int h = (int) bounds.height + dy;
ArrayList<Point> rem = new ArrayList<Point>();

g2.setStroke(STROKE);
g2.setColor(Color.RED);
g2.drawRect(x, y, w, h);
for (Map.Entry<Point, Integer> ent : motionPoints.entrySet()) {
Point p = ent.getKey();

}
if (ent.getValue() != null) {
int tt = ent.getValue();
if (tt >= renderTime) {
rem.add(ent.getKey());

}
} else {
int temp = ent.getValue() + 1;
motionPoints.put(p, temp);
}

}
}

for (Point p : rem) {
motionPoints.remove(p);
}

// Gets all the remaining points after removing the exceeded ones and then renders the
// current ones as a red square

for (Map.Entry<Point, Integer> ent : motionPoints.entrySet()) {

Point p = ent.getKey();
int xx = p.x - (renderSize / 2), yy = p.y - (renderSize / 2);

Rectangle bounds = new Rectangle(xx, yy, renderSize, renderSize);

int dx = (int) (0.1 * bounds.width);
int dy = (int) (0.2 * bounds.height);
int x = bounds.x - dx;
int y = bounds.y - dy;
int w = bounds.width + 2 * dx;
int h = bounds.height + dy;

g2.setStroke(STROKE);
g2.setColor(Color.RED);
g2.drawRect(x, y, w, h);
}
}
}

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