Capturing live image from integrated Webcam using Labview

How can i capture live image from my laptop integrated webcam using LabVIEW ?
Even after installing all the IMAQ drivers, MAX is not displaying my integrated webcam ?
Why is it so ?
do i need to install some additional drivers for this ?
Thanks and Regards
Gaurav Pal

hi, you can use NI Vision Assistant
IDE ofNI Vision Assistant
..select acquire images
...select option 2
...select devices: CAM0 (default webcam), video mode resolution
...option 1 acquire single, option 2 acquire continuous
Atom
Certified LabVIEW Associate Developer

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Capturing an image from webcam

hi, i'm trying to capture a image from a webcam, but i don't have a clue of how to do this, could anyone help me with samples or books.
thanks.

hi
so as i understood u want to access the USB and make whats called camera interaction i worked with my webcam and i generate a video stream and i'm working now to sample this video
i found these class on the internet u have to make a littel changes like camera defention
* File: DeviceInfo.java.java
* created 24.07.2001 21:44:12 by David Fischer, [email protected]
import java.awt.Dimension;
import javax.media.*;
import javax.media.control.*;
import javax.media.format.*;
import javax.media.protocol.*;
public class DeviceInfo
 public static Format formatMatches (Format format, Format supported[] )
 if (supported == null)
 return null;
 for (int i = 0; i < supported.length; i++)
 if (supported.matches(format))
 return supported[i];
 return null;
 public static boolean setFormat(DataSource dataSource, Format format)
 boolean formatApplied = false;
 FormatControl formatControls[] = null;
 formatControls = ((CaptureDevice) dataSource).getFormatControls();
 for (int x = 0; x < formatControls.length; x++)
 if (formatControls[x] == null)
 continue;
 Format supportedFormats[] = formatControls[x].getSupportedFormats();
 if (supportedFormats == null)
 continue;
 if (DeviceInfo.formatMatches(format, supportedFormats) != null)
 formatControls[x].setFormat(format);
 formatApplied = true;
 return formatApplied;
 public static boolean isVideo(Format format)
 return (format instanceof VideoFormat);
 public static boolean isAudio(Format format)
 return (format instanceof AudioFormat);
 public static String formatToString(Format format)
 if (isVideo(format))
 return videoFormatToString((VideoFormat) format);
 if (isAudio(format))
 return audioFormatToString((AudioFormat) format);
 return ("--- unknown media device format ---");
 public static String videoFormatToString(VideoFormat videoFormat)
 StringBuffer result = new StringBuffer();
 // add width x height (size)
 Dimension d = videoFormat.getSize();
 result.append("size=" + (int) d.getWidth() + "x" + (int) d.getHeight() + ", ");
 // try to add color depth
 if (videoFormat instanceof IndexedColorFormat)
 IndexedColorFormat f = (IndexedColorFormat) videoFormat;
 result.append("color depth=" + f.getMapSize() + ", ");
 // add encoding
 result.append("encoding=" + videoFormat.getEncoding() + ", ");
 // add max data length
 result.append("maxdatalength=" + videoFormat.getMaxDataLength() + "");
 return result.toString();
 public static String audioFormatToString(AudioFormat audioFormat)
 StringBuffer result = new StringBuffer();
 // short workaround
 result.append(audioFormat.toString().toLowerCase());
 return result.toString();
the second class:
* File: MyDataSinkListener.java
* created 24.07.2001 21:41:47 by David Fischer, [email protected]
* Decription: simple data sink listener, used to check for end of stream
import javax.media.datasink.*;
public class MyDataSinkListener implements DataSinkListener
 boolean endOfStream = false;
 public void dataSinkUpdate(DataSinkEvent event)
 if (event instanceof javax.media.datasink.EndOfStreamEvent)
 endOfStream = true;
 public void waitEndOfStream(long checkTimeMs)
 while (! endOfStream)
 Stdout.log("datasink: waiting for end of stream ...");
 try { Thread.currentThread().sleep(checkTimeMs); } catch (InterruptedException ie) {}
 Stdout.log("datasink: ... end of stream reached.");
* File: MyDataSinkListener.java
* created 24.07.2001 21:41:47 by David Fischer, [email protected]
* Decription: simple data sink listener, used to check for end of stream
import javax.media.datasink.*;
public class MyDataSinkListener implements DataSinkListener
 boolean endOfStream = false;
 public void dataSinkUpdate(DataSinkEvent event)
 if (event instanceof javax.media.datasink.EndOfStreamEvent)
 endOfStream = true;
 public void waitEndOfStream(long checkTimeMs)
 while (! endOfStream)
 Stdout.log("datasink: waiting for end of stream ...");
 try { Thread.currentThread().sleep(checkTimeMs); } catch (InterruptedException ie) {}
 Stdout.log("datasink: ... end of stream reached.");
}[i]the 3rd class:/******************************************************
* File: Stdout.java.java
* created 24.07.2001 21:44:46 by David Fischer, [email protected]
* Description: utility class for standard output
public class Stdout
 public static void log(String msg)
 System.out.println(msg);
 public static void logAndAbortException(Exception e)
 log("" + e);
 flush();
 System.exit(0);
 public static void logAndAbortError(Error e)
 log("" + e);
 flush();
 System.exit(0);
 public static void flush()
 System.out.flush();
the 4rt is :
* File: TestQuickCamPro.java
* created 24.07.2001 21:40:13 by David Fischer, [email protected]
* Description: this test program will capture the video and audio stream
* from a Logitech QuickCam� Pro 3000 USB camera for 10 seconds and stores
* it on a file, named "testcam.avi". You can use the microsoft windows
* media player to display this file.
* operating system: Windows 2000
* required hardware: Logitech QuickCam� Pro 3000
* required software: jdk 1.3 or jdk1.4 plus jmf2.1.1 (www.javasoft.com)
* source files: DeviceInfo.java, MyDataSinkListener.java,
* Stdout.java, TestQuickCamPro.java
* You can just start this program with "java TestQuickCamPro"
* hint: please make shure that you setup first the logitech camerea drives
* and jmf2.1.1 correctly. "jmf.jar" must be part of your CLASSPATH.
* useful links:
* - http://java.sun.com/products/java-media/jmf/2.1.1/index.html
* - http://java.sun.com/products/java-media/jmf/2.1.1/solutions/index.html
* with some small modifications, this program will work with any USB camera.
import java.io.*;
import javax.media.*;
import javax.media.control.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
public class TestQuickCamPro
 private static boolean debugDeviceList = false;
 private static String defaultVideoDeviceName = "vfw:Microsoft WDM Image Capture (Win32):0";
 private static String defaultAudioDeviceName = "DirectSoundCapture";
 private static String defaultVideoFormatString = "size=176x144, encoding=yuv, maxdatalength=38016";
 private static String defaultAudioFormatString = "linear, 16000.0 hz, 8-bit, mono, unsigned";
 private static CaptureDeviceInfo captureVideoDevice = null;
 private static CaptureDeviceInfo captureAudioDevice = null;
 private static VideoFormat captureVideoFormat = null;
 private static AudioFormat captureAudioFormat = null;
 public static void main(String args[])
 // get command line arguments
 for (int x = 0; x < args.length; x++)
 // -dd = debug devices list -> display list of all media devices - and exit
 if (args[x].toLowerCase().compareTo("-dd") == 0)
 debugDeviceList = true;
 // get a list of all media devices, search default devices and formats, and print it out if args[x] = "-dd"
 Stdout.log("get list of all media devices ...");
 java.util.Vector deviceListVector = CaptureDeviceManager.getDeviceList(null);
 if (deviceListVector == null)
 Stdout.log("... error: media device list vector is null, program aborted");
 System.exit(0);
 if (deviceListVector.size() == 0)
 Stdout.log("... error: media device list vector size is 0, program aborted");
 System.exit(0);
 for (int x = 0; x < deviceListVector.size(); x++)
 // display device name
 CaptureDeviceInfo deviceInfo = (CaptureDeviceInfo) deviceListVector.elementAt(x);
 String deviceInfoText = deviceInfo.getName();
 if (debugDeviceList)
 Stdout.log("device " + x + ": " + deviceInfoText);
 // display device formats
 Format deviceFormat[] = deviceInfo.getFormats();
 for (int y = 0; y < deviceFormat.length; y++)
 // serach for default video device
 if (captureVideoDevice == null)
 if (deviceFormat[y] instanceof VideoFormat)
 if (deviceInfo.getName().indexOf(defaultVideoDeviceName) >= 0)
 captureVideoDevice = deviceInfo;
 Stdout.log(">>> capture video device = " + deviceInfo.getName());
 // search for default video format
 if (captureVideoDevice == deviceInfo)
 if (captureVideoFormat == null)
 if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultVideoFormatString) >= 0)
 captureVideoFormat = (VideoFormat) deviceFormat[y];
 Stdout.log(">>> capture video format = " + DeviceInfo.formatToString(deviceFormat[y]));
 // serach for default audio device
 if (captureAudioDevice == null)
 if (deviceFormat[y] instanceof AudioFormat)
 if (deviceInfo.getName().indexOf(defaultAudioDeviceName) >= 0)
 captureAudioDevice = deviceInfo;
 Stdout.log(">>> capture audio device = " + deviceInfo.getName());
 // search for default audio format
 if (captureAudioDevice == deviceInfo)
 if (captureAudioFormat == null)
 if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultAudioFormatString) >= 0)
 captureAudioFormat = (AudioFormat) deviceFormat[y];
 Stdout.log(">>> capture audio format = " + DeviceInfo.formatToString(deviceFormat[y]));
 if (debugDeviceList)
 Stdout.log(" - format: " + DeviceInfo.formatToString(deviceFormat[y]));
 Stdout.log("... list completed.");
 // if args[x] = "-dd" terminate now
 if (debugDeviceList)
 System.exit(0);
 // setup video data source
 MediaLocator videoMediaLocator = captureVideoDevice.getLocator();
 DataSource videoDataSource = null;
 try
 videoDataSource = javax.media.Manager.createDataSource(videoMediaLocator);
 catch (IOException ie) { Stdout.logAndAbortException(ie); }
 catch (NoDataSourceException nse) { Stdout.logAndAbortException(nse); }
 if (! DeviceInfo.setFormat(videoDataSource, captureVideoFormat))
 Stdout.log("Error: unable to set video format - program aborted");
 System.exit(0);
 // setup audio data source
 MediaLocator audioMediaLocator = captureAudioDevice.getLocator();
 DataSource audioDataSource = null;
 try
 audioDataSource = javax.media.Manager.createDataSource(audioMediaLocator);
 catch (IOException ie) { Stdout.logAndAbortException(ie); }
 catch (NoDataSourceException nse) { Stdout.logAndAbortException(nse); }
 if (! DeviceInfo.setFormat(audioDataSource, captureAudioFormat))
 Stdout.log("Error: unable to set audio format - program aborted");
 System.exit(0);
 // merge the two data sources
 DataSource mixedDataSource = null;
 try
 DataSource dArray[] = new DataSource[2];
 dArray[0] = videoDataSource;
 dArray[1] = audioDataSource;
 mixedDataSource = javax.media.Manager.createMergingDataSource(dArray);
 catch (IncompatibleSourceException ise) { Stdout.logAndAbortException(ise); }
 // create a new processor
 // setup output file format ->> msvideo
 FileTypeDescriptor outputType = new FileTypeDescriptor(FileTypeDescriptor.MSVIDEO);
 // setup output video and audio data format
 Format outputFormat[] = new Format[2];
 outputFormat[0] = new VideoFormat(VideoFormat.INDEO50);
 outputFormat[1] = new AudioFormat(AudioFormat.GSM_MS /* LINEAR */);
 // create processor
 ProcessorModel processorModel = new ProcessorModel(mixedDataSource, outputFormat, outputType);
 Processor processor = null;
 try
 processor = Manager.createRealizedProcessor(processorModel);
 catch (IOException e) { Stdout.logAndAbortException(e); }
 catch (NoProcessorException e) { Stdout.logAndAbortException(e); }
 catch (CannotRealizeException e) { Stdout.logAndAbortException(e); }
 // get the output of the processor
 DataSource source = processor.getDataOutput();
 // create a File protocol MediaLocator with the location
 // of the file to which bits are to be written
 MediaLocator dest = new MediaLocator("file:testcam.avi");
 // create a datasink to do the file
 DataSink dataSink = null;
 MyDataSinkListener dataSinkListener = null;
 try
 dataSink = Manager.createDataSink(source, dest);
 dataSinkListener = new MyDataSinkListener();
 dataSink.addDataSinkListener(dataSinkListener);
 dataSink.open();
 catch (IOException e) { Stdout.logAndAbortException(e); }
 catch (NoDataSinkException e) { Stdout.logAndAbortException(e); }
 catch (SecurityException e) { Stdout.logAndAbortException(e); }
 // now start the datasink and processor
 try
 dataSink.start();
 catch (IOException e) { Stdout.logAndAbortException(e); }
 processor.start();
 Stdout.log("starting capturing ...");
 try { Thread.currentThread().sleep(10000); } catch (InterruptedException ie) {} // capture for 10 seconds
 Stdout.log("... capturing done");
 // stop and close the processor when done capturing...
 // close the datasink when EndOfStream event is received...
 processor.stop();
 processor.close();
 dataSinkListener.waitEndOfStream(10);
 dataSink.close();
 Stdout.log("[all done]");
}finally search with the athour name there is an additional program u must download to detect ur cam .
i hope that is work with u

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Capturing live image from integrated Webcam using Labview

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