在java中捕获来自网络摄像头的图像？

如何从网络摄像头连续捕获图像？

我想尝试对象识别(可能使用java媒体框架).

我在考虑创建两个线程

一个帖子:

节点1:捕获实时图像

节点2:将图像保存为"1.jpg"

节点3:等待5秒

节点4:重复......

其他线程:

节点1:等到捕获图像

节点2:使用"1.jpg"获取每个像素的颜色

节点3:将数据保存在数组中

节点4:重复......

gtiwari333.. 46

这个JavaCV实现工作正常.

码:

import org.bytedeco.javacv.*;

import static org.bytedeco.javacpp.opencv_core.IplImage;
import static org.bytedeco.javacpp.opencv_core.cvFlip;
import static org.bytedeco.javacpp.opencv_imgcodecs.cvSaveImage;


/**
 * Created by gtiwari on 1/3/2017.
 */

public class Test implements Runnable {
    final int INTERVAL = 100;///you may use interval
    CanvasFrame canvas = new CanvasFrame("Web Cam");

    public Test() {
        canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
    }

    public void run() {

        FrameGrabber grabber = new VideoInputFrameGrabber(0); // 1 for next camera
        OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage();
        IplImage img;
        int i = 0;
        try {
            grabber.start();
            while (true) {
                Frame frame = grabber.grab();

                img = converter.convert(frame);

                //the grabbed frame will be flipped, re-flip to make it right
                cvFlip(img, img, 1);// l-r = 90_degrees_steps_anti_clockwise

                //save
                cvSaveImage((i++) + "-aa.jpg", img);

                canvas.showImage(converter.convert(img));

                Thread.sleep(INTERVAL);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        Test gs = new Test();
        Thread th = new Thread(gs);
        th.start();
    }
}

还有关于JavaCV的配置文章

您可以修改代码并能够定期保存图像并执行所需的其余处理.

1> gtiwari333..：

---

这个JavaCV实现工作正常.

码:

import org.bytedeco.javacv.*;

import static org.bytedeco.javacpp.opencv_core.IplImage;
import static org.bytedeco.javacpp.opencv_core.cvFlip;
import static org.bytedeco.javacpp.opencv_imgcodecs.cvSaveImage;


/**
 * Created by gtiwari on 1/3/2017.
 */

public class Test implements Runnable {
    final int INTERVAL = 100;///you may use interval
    CanvasFrame canvas = new CanvasFrame("Web Cam");

    public Test() {
        canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
    }

    public void run() {

        FrameGrabber grabber = new VideoInputFrameGrabber(0); // 1 for next camera
        OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage();
        IplImage img;
        int i = 0;
        try {
            grabber.start();
            while (true) {
                Frame frame = grabber.grab();

                img = converter.convert(frame);

                //the grabbed frame will be flipped, re-flip to make it right
                cvFlip(img, img, 1);// l-r = 90_degrees_steps_anti_clockwise

                //save
                cvSaveImage((i++) + "-aa.jpg", img);

                canvas.showImage(converter.convert(img));

                Thread.sleep(INTERVAL);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        Test gs = new Test();
        Thread th = new Thread(gs);
        th.start();
    }
}

还有关于JavaCV的配置文章

您可以修改代码并能够定期保存图像并执行所需的其余处理.

---

+1你摇滚!我一直在寻找一个良好的开源,并支持JMF替代Windows和Linux中的网络摄像头捕获.这就像一个魅力!谢谢 :)

---

对我不起作用,它说线程"main"中的异常java.lang.UnsatisfiedLinkError:C:\ Users\steve\AppData\Local\Temp\javacpp213892357885346\jniopencv_core.dll:找不到依赖库

2> Bartosz Firy..：

---

前段时间我创建了通用的Java库,可用于通过PC网络摄像头拍照.API非常简单,不会过度使用,可以独立工作,但也支持其他网络摄像头驱动程序,如OpenIMAJ,JMF,FMJ,LTI-CIVIL等,以及一些IP摄像头.

该项目的链接是https://github.com/sarxos/webcam-capture

示例代码(拍照并保存在test.jpg中):

Webcam webcam = Webcam.getDefault();
webcam.open();
BufferedImage image = webcam.getImage();
ImageIO.write(image, "JPG", new File("test.jpg"));

它也可以在Maven Central Repository中使用,也可以作为单独的ZIP包含所有必需的依赖项和第三方JAR.

---

@JavaMan,您可以通过设置自定义Painter实例在显示来自摄像头(WebcamPanel)的视图的面板上绘图,或者使用WebcamImageTransformer功能直接在来自摄像头的图像上绘制.有关详细信息,请在Github上的Webcam Capture项目页面上打开票证,因为我不想在Stack Overflow上详细解释这一点(写入太多而在评论中使用的字符太少).该项目可以在这里找到https://github.com/sarxos/webcam-capture

3> 小智..：

---

JMyron非常简单易用. http://webcamxtra.sourceforge.net/

myron = new JMyron();
myron.start(imgw, imgh);
myron.update();
int[] img = myron.image();

4> rics..：

---

这是一个类似的问题,有些 - 但尚未接受 - 答案.其中一人提到FMJ是JMF的Java替代品.

5> syb0rg..：

---

这种使用JavaCV取决于gt_ebuddy的答案,但我的视频输出质量远高于他的答案.我还添加了一些其他的随机改进(如倒闭程序时ESC和CTRL+C被按下,并确保关闭该程序使用正确的资源).

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;

import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;

import com.googlecode.javacv.CanvasFrame;
import com.googlecode.javacv.OpenCVFrameGrabber;
import com.googlecode.javacv.cpp.opencv_core.IplImage;

public class HighRes extends JComponent implements Runnable {
    private static final long serialVersionUID = 1L;

    private static CanvasFrame frame = new CanvasFrame("Web Cam");
    private static boolean running = false;
    private static int frameWidth = 800;
    private static int frameHeight = 600;
    private static OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0);
    private static BufferedImage bufImg;

    public HighRes()
    {
        // setup key bindings
        ActionMap actionMap = frame.getRootPane().getActionMap();
        InputMap inputMap = frame.getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);

        for (Keys direction : Keys.values())
        {
            actionMap.put(direction.getText(), new KeyBinding(direction.getText()));
            inputMap.put(direction.getKeyStroke(), direction.getText());
        }

        frame.getRootPane().setActionMap(actionMap);
        frame.getRootPane().setInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW, inputMap);

        // setup window listener for close action
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent e)
            {
                stop();
            }
        });
    }

    public static void main(String... args)
    {
        HighRes webcam = new HighRes();
        webcam.start();
    }

    @Override
    public void run()
    {
        try
        {

            grabber.setImageWidth(frameWidth);
            grabber.setImageHeight(frameHeight);
            grabber.start();
            while (running)
            {

                final IplImage cvimg = grabber.grab();
                if (cvimg != null)
                {

                    // cvFlip(cvimg, cvimg, 1); // mirror

                    // show image on window
                    bufImg = cvimg.getBufferedImage();
                    frame.showImage(bufImg);
                }
            }
            grabber.stop();
            grabber.release();
            frame.dispose();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    public void start()
    {
        new Thread(this).start();
        running = true;
    }

    public void stop()
    {
        running = false;
    }

    private class KeyBinding extends AbstractAction {

        private static final long serialVersionUID = 1L;

        public KeyBinding(String text)
        {
            super(text);
            putValue(ACTION_COMMAND_KEY, text);
        }

        @Override
        public void actionPerformed(ActionEvent e)
        {
            String action = e.getActionCommand();
            if (action.equals(Keys.ESCAPE.toString()) || action.equals(Keys.CTRLC.toString())) stop();
            else System.out.println("Key Binding: " + action);
        }
    }
}

enum Keys
{
    ESCAPE("Escape", KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0)),
    CTRLC("Control-C", KeyStroke.getKeyStroke(KeyEvent.VK_C, KeyEvent.CTRL_DOWN_MASK)),
    UP("Up", KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0)),
    DOWN("Down", KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0)),
    LEFT("Left", KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0)),
    RIGHT("Right", KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0));

    private String text;
    private KeyStroke keyStroke;

    Keys(String text, KeyStroke keyStroke)
    {
        this.text = text;
        this.keyStroke = keyStroke;
    }

    public String getText()
    {
        return text;
    }

    public KeyStroke getKeyStroke()
    {
        return keyStroke;
    }

    @Override
    public String toString()
    {
        return text;
    }
}