本文整理了Java中com.github.sarxos.webcam.Webcam.isOpen()方法的一些代码示例，展示了Webcam.isOpen()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Webcam.isOpen()方法的具体详情如下：
包路径：com.github.sarxos.webcam.Webcam
类名称：Webcam
方法名：isOpen

Webcam.isOpen介绍

[英]Is webcam open?
[中]网络摄像头开着吗？

代码示例

代码示例来源：origin: sarxos/webcam-capture

@Override
  protected Void doInBackground() throws Exception {
    try {
      if (webcam.isOpen()) {
        errored = !webcam.close();
      }
    } catch (WebcamException e) {
      errored = true;
      throw e;
    } finally {
      repaintPanel();
    }
    return null;
  }
};

代码示例来源：origin: sarxos/webcam-capture

@Override
  protected Void doInBackground() throws Exception {
    try {
      if (!webcam.isOpen()) {
        errored = !webcam.open();
      }
    } catch (WebcamException e) {
      errored = true;
      throw e;
    } finally {
      starting = false;
      repaintPanel();
    }
    return null;
  }
};

代码示例来源：origin: sarxos/webcam-capture

@Override
  public void run() {
    running.set(true);
    while (running.get() && webcam.isOpen()) {
      try {
        detect();
        Thread.sleep(interval);
      } catch (InterruptedException e) {
        break;
      } catch (Exception e) {
        WebcamExceptionHandler.handle(e);
      }
    }
    running.set(false);
  }
}

代码示例来源：origin: sarxos/webcam-capture

/**
   * Perform single panel area update (repaint newly obtained image).
   */
  private void update() {
    // do nothing when updater not running, when webcam is closed, or
    // panel repainting is paused
    if (!running.get() || !webcam.isOpen() || paused) {
      return;
    }
    // get new image from webcam
    BufferedImage tmp = supplier.get();
    boolean repaint = true;
    if (tmp != null) {
      // ignore repaint if image is the same as before
      if (image == tmp) {
        repaint = false;
      }
      errored = false;
      image = tmp;
    }
    if (repaint) {
      repaintPanel();
    }
  }
}

代码示例来源：origin: sarxos/webcam-capture

if (webcam.isOpen()) {

代码示例来源：origin: sarxos/webcam-capture

public static final void capture(Webcam webcam, File file, String format) {
  if (!webcam.isOpen()) {
    webcam.open();
  }
  try {
    ImageIO.write(webcam.getImage(), format, file);
  } catch (IOException e) {
    throw new WebcamException(e);
  }
}

代码示例来源：origin: sarxos/webcam-capture

public static final void capture(Webcam webcam, File file) {
  if (!webcam.isOpen()) {
    webcam.open();
  }
  try {
    ImageIO.write(webcam.getImage(), ImageUtils.FORMAT_JPG, file);
  } catch (IOException e) {
    throw new WebcamException(e);
  }
}

代码示例来源：origin: sarxos/webcam-capture

if (!webcam.isOpen() || socket.isInputShutdown() || socket.isClosed()) {
  br.close();
  bos.close();

代码示例来源：origin: sarxos/webcam-capture

protected void detect() {
  if (!webcam.isOpen()) {
    motion = false;
    return;
  }
  BufferedImage currentOriginal = webcam.getImage();
  if (currentOriginal == null) {
    motion = false;
    return;
  }
  final BufferedImage currentFiltered = algorithm.filter(currentOriginal);
  final boolean motionDetected = algorithm.detect(previousFiltered, currentFiltered);
  if (motionDetected) {
    motion = true;
    lastMotionTimestamp = System.currentTimeMillis();
    notifyMotionListeners(currentOriginal);
  }
  previousOriginal = currentOriginal;
  previousFiltered = currentFiltered;
}

代码示例来源：origin: sarxos/webcam-capture

private void tick() {
  if (!webcam.isOpen()) {
    return;
  if (webcam.isOpen()) {
    try {
      executor.schedule(this, delay, TimeUnit.MILLISECONDS);

代码示例来源：origin: stackoverflow.com

Webcam webcam = Webcam.getDefault(); // non-default (e.g. USB) webcam can be used too
webcam.open();

Result result = null;
BufferedImage image = null;

if (webcam.isOpen()) {
  if ((image = webcam.getImage()) == null) {
    continue;
  }

  LuminanceSource source = new BufferedImageLuminanceSource(image);
  BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
  try {
    result = new MultiFormatReader().decode(bitmap);
  } catch (NotFoundException e) {
    // fall thru, it means there is no QR code in image
  }
}

if (result != null) {
  System.out.println("QR code data is: " + result.getText());
}

代码示例来源：origin: io.rhiot/camel-webcam

private Webcam openWebcam(Webcam webcam, Dimension dimension) {
  
  //Once started another endpoint may want to change from low res to high res, for example
  if (webcam.isOpen() && isStarted() && !dimension.equals(webcam.getViewSize())) {
    webcam.close();
  } 
  
  if (!webcam.isOpen() && dimension != null) {
    webcam.setCustomViewSizes(new Dimension[]{dimension});
    webcam.setViewSize(dimension);
    webcam.open(true);
  } else if (!webcam.isOpen()) {
    webcam.open(true);
  }
  
  return webcam;
}

代码示例来源：origin: io.rhiot/camel-webcam

@Override
public void process(Exchange exchange) throws Exception {
  Webcam webcam = getEndpoint().getWebcam();
  if (webcam == null) {
    throw new WebcamNotFoundException("No webcams found");
  } else if (!webcam.isOpen() && !webcam.open()) {
    throw new IllegalStateException("Unable to open webcam");
  } 
  
  BufferedImage image = webcam.getImage();
  if (image != null) {
    exchange.getIn().setBody(ImageUtils.toByteArray(image, getEndpoint().getFormat()));
  }
}

代码示例来源：origin: stackoverflow.com

BufferedImage image = null;
if (webcam.isOpen()) {

代码示例来源：origin: org.activecomponents.jadex/jadex-applications-micro

public static void main(String[] args) throws Exception
  {
    Webcam webcam = Webcam.getDefault();
    webcam.setViewSize(WebcamResolution.VGA.getSize());
    if(webcam.isOpen()) 
      webcam.close();
    webcam.open();
    
    SequenceEncoder enc = new SequenceEncoder(new File("out.ts"));
    
    for(int i=0; i<100; i++)
    {
      enc.encodeImage(webcam.getImage());
      try
      {
        Thread.sleep(100);
      }
      catch(Exception e)
      {
      }
    }
    enc.finish();
  }
}

代码示例来源：origin: io.rhiot/camel-webcam

@Override
protected int poll() throws Exception {
  if (getEndpoint().getWebcam() != null && getEndpoint().getWebcam().isOpen()) {
    Webcam webcam = getEndpoint().getWebcam();
    BufferedImage image = webcam.getImage();
    if (image != null) {
      WebcamHelper.consumeBufferedImage(image, getProcessor(), getEndpoint(), getExceptionHandler());
      return 1;
    } else {
      log.debug("No image returned from the webcam poll.");
      return 0;
    }
  } else {
    return 0;
  }
}