Capturing images from two web camera in real time

Hi,
I need to compare two pictures from two webcameras. I will make some easy computing on them, so there should be no speed problem, but i dont know how can i take each picture? is there any action which is called each time a frame comes? do sb have some sample code?
thanks
JJ

Here's source code I posted to capture a frame from one webcam.
http://forum.java.sun.com/thread.jspa?threadID=570463&tstart=25
Lots of people have problems with multiple cameras, something to do with the
Windows USB channels and failing to detect/select between the two.
So, capturing frames from 1 web cam is relatively straightforward, but you may have serious problems with two or more.
regards,
Owen

Similar Messages

Receive image from two web-cameras

Hallo all.
I have LV 7.1.1
I have two web-cameras which are connected to USB1 & USB2.
How can I see two images from two web-cameras or more in LV at the same time?
With respect
Aleksandr
Message Edited by [email protected] on 06-19-2006 01:20 AM

Aleksandr,
The IMAQ for USB driver communicates to the 3rd party camera driver using Directshow. There is an IMAQ USB Property Page VI available in LabVIEW that gives you the ability to open the camera configuration page of the 3rd party camera provided that there is one available. Depending on the vendor, you may or may not have access to change the resolution of your camera through this property page. I would contact the manufacturer of the camera to find out if there is a way to do this.
In case you are curious to know where to find the IMAQ USB Property Page VI, right-click on the block diagram and go to Search in the upper right corner of the palette. Search for "IMAQ USB Property Page" and the corresponding VI will show up in the list below it.
Regards,
Mike T
National Instruments

Problem in grabing images from two web cams

Hi
I am trying to modify single web cam capturing screen code into multiple web cam screen capturing. The method autoDetect() recognizes the web camera. I want to choose web cam by myself. I tried all devInfo from the list but it resulted no success. Always the first camera is selected . I use different cameras (Logitech and Genius). Please, how to detect both camera to work at the same time.
public CaptureDeviceInfo autoDetect ( )
        Vector list = CaptureDeviceManager.getDeviceList (null);
        CaptureDeviceInfo devInfo = null;
            if ( list != null )
            String name;
            for ( int i=0; i<list.size(); i++ )
                devInfo = (CaptureDeviceInfo)list.elementAt ( i );
                name = devInfo.getName();
               if ( name.startsWith ("vfw:") )
                                 break;
          ...The whole code is on: JWebCam

Here's source code I posted to capture a frame from one webcam.
http://forum.java.sun.com/thread.jspa?threadID=570463&tstart=25
Lots of people have problems with multiple cameras, something to do with the
Windows USB channels and failing to detect/select between the two.
So, capturing frames from 1 web cam is relatively straightforward, but you may have serious problems with two or more.
regards,
Owen

Lightroom not merging and sorting images from two different cameras - help please !!

Hi guys,
I need some help here. I've just imported a few thousands of images form two different cameras, however Lightroom simply sorts them by camera only. (i.e.. images from the first camera, all sorted by capture time, then come images form the second camera.)
The cameras are the same brand and model, times are synchronised, but the images refuse to merge and sort. I've tried putting them in the same folder and importing, but that doesn't do it either. I've been doing this for years and it all worked fine, till today. Does anyone know whats causing this, and how I can fix it?
Thanks in anticipation.
Latch

Hi John,
View > Sort > Capture Time is checked, The cameras are in sync down to the second, and images from both have been merging and sorting fine for over two years, till today. Sort order is all set to capture time in all modes and views, but its still sorting first by camera.

Errors in code that captures images from webcam

Here is the code
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// import com.sun.media.vfw.VFWCapture; // JMF 2.1.1c version
import com.sun.media.protocol.vfw.VFWCapture; // JMF 2.1.1e version
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
protected final static int MIN_WIDTH = 320;
protected final static int MIN_HEIGHT = 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected boolean initialised = false;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("");
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
return ( initialise ( autoDetect() ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
player.start();
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
myFormatList = new MyVideoFormat ( (VideoFormat)videoFormats );
Format currFormat = formatControl.getFormat();
if ( currFormat instanceof VideoFormat )
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.err.println ("Error : Cannot get current video format");
invalidate();
pack();
return ( true );
else
System.err.println ("Error : Could not get visual component");
return ( false );
else
System.err.println ("Error : Cannot create player");
statusBar.setText ( "Cannot create player" );
return ( false );
else
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
catch ( IOException ioEx )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
player.stop();
imageSize = selectedFormat.getSize();
formatControl.setFormat ( selectedFormat );
player.start();
statusBar.setText ( "Format : " + selectedFormat );
currentFormat = selectedFormat;
visualContainer.setPreferredSize ( currentFormat.getSize() );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
public VideoFormat getFormat ( )
return ( currentFormat );
protected void setUpToolBar ( )
toolbar = new JToolBar();
// Note : If you supply the 16 x 16 bitmaps then you can replace
// the commented line in the MyToolBarAction constructor
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
if ( photo != null )
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
else
System.err.println ("Error : Could not grab frame");
* autoDetects the first web camera in the system
* searches for video for windows ( vfw ) capture devices
* @returns the device info object if found, null otherwise
public CaptureDeviceInfo autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
if ( list != null )
String name;
for ( int i=0; i<list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
break;
if ( devInfo != null && devInfo.getName().startsWith("vfw:") )
return ( devInfo );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
return ( devInfo );
catch ( Exception ioEx )
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
return ( null );
else
return ( null );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i<formats.length; i++ )
Format[] aFormat = formats;
if ( aFormat[i] instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats.getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
return ( fgc.grabFrame() );
else
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
else
System.err.println ("Error : Player is null");
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
Image image = btoi.createImage ( buffer );
if ( image != null )
return ( image );
else
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
else
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized ( ComponentEvent e )
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
// Note : Use version this if you supply your own toolbar icons
// super ( name, new ImageIcon ( imagefile ) );
super ( name );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat _format )
format = _format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MySnapshot extends JFrame
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false ); // 100% high quality setting, no compression
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "TimeSlice Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace();
when I run it I get the following errors
BufferToImage cannot convert buffer
could not grab frame
pls help

Do you expect anyone to read this?
http://forum.java.sun.com/help.jspa?sec=formatting
By the way, you have a condition that makes it print those messages. Check why that condiiton isn't rue.

Capture an image using the web camera from a web application

Hi All,
Could anyone please share the steps what have to be followed for capture an image using the web camera from a web application.
I have a similar requirement like this,
1) Detect the Webcam on the users machine from the web application.(To be more clear when the user clicks on 'Add Photo' tool from the web application)
2) When the user confirms to save, save the Image in users machine at some temporary location with some unique file name.
3) Upload the Image to the server from the temporary location.
Please share the details like, what can be used and how it can be used etc...
Thanks,
Suman

1) Detect the Webcam on the users machine from the web application.(To be more clear when the user clicks on 'Add Photo' tool from the web application)There's not really any good way to do this with JMF. You'd have to somehow create a JMF web-start application that will install the native JMF binaries, and then kick off the capture device scanning code from the application, and then scan through the list of devices found to get the MediaLocator of the web cam.
2) When the user confirms to save, save the Image in users machine at some temporary location with some unique file name.You'd probably be displaying a "preview" window and then you'd just want to capture the image. There are a handful of ways you could capture the image, but it really depends on your situation.
3) Upload the Image to the server from the temporary location.You can find out how to do this on google.
All things told, this application is probably more suited to be a FMJ (Freedom for Media in Java) application than a JMF application. JMF relies on native code to capture from the web cams, whereas FMJ does not.
Alternately, you might want to look into Adobe Flex for this particular application.

How to capture an image from my usb camera and display on my front panel

How to capture an image from my usb camera and display on my front panel

Install NI Vision Acquisition Software and NI IMAQ for USB and open an example.
Christian

Capturing images from camera and uploading to sharepoint library automatically.

Hello Everyone,
My requirement is to capturing images from camera and uploading to sharepoint library automatically. No manual uploading will take place.
Please suggest me.
Thanks,
Rajesh

Hi,
From your description, my understanding is that you want to capturing images from camera and uploading to sharepoint library automatically automatically upload images to SharePoint library.
You will save images in your local computer after capturing visitors’ image. You could develop a custom timer job to periodically get pictures from the local folder in your computer. Please refer to this article:
Create and Deploy Custom Timer Job Definition in SharePoint Programatically
http://www.codeproject.com/Tips/634208/Create-and-Deploy-Custom-Timer-Job-Definition-in-S
you could upload pictures to your SharePoint from the folder with C# code, please refer to this article:
How to: Upload a File to a SharePoint Site from a Local Folder
https://msdn.microsoft.com/en-us/library/office/ms454491%28v=office.14%29.aspx?f=255&MSPPError=-2147217396
Best Regards,
Vincent Han
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
[email protected]

Capture images from Camera directly at high resolution

Hello Users,
I want to capture images from Camera directly at high
resolution. The problem is that although I am able to capture
images from a Video Object, but the images are small because the
Video size is only 160x120. So if I am able to capture directly
from Camera, I am sure to get a higher resolution images at which
the camera is capturing.
Any help in this matter will be of great help

Hello Users,
I want to capture images from Camera directly at high
resolution. The problem is that although I am able to capture
images from a Video Object, but the images are small because the
Video size is only 160x120. So if I am able to capture directly
from Camera, I am sure to get a higher resolution images at which
the camera is capturing.
Any help in this matter will be of great help

How to capture image from USB camera in Labview 2010

Hey all,
I am very new to Labview but am working on a project that requires me to use a sensor to send a signal to Labview to capture an image from a USB camera and save. Then apply some image processing to do some geometric calculations. The calculation will be based on pixels so I guess the image needs to be in bitmap form. Right now I am just trying to start with the image acquisition part and was wondering if this can be done in Labview 2010. I have the vision toolbox and NXT Robotics. Are there any examples on this website that will help and do I have te proper tools to do this? Once I get the image capture/grab to work using labview, then I could work getting a sensor signal to trigger that capture and finally the processing side.
Like I said, I am very new to this so I am not sure if I need to download any particular drivers or vi's that I am missing or what those might be. Can someone provide some insight, links, or any help would be appreciated.
Thanks in advance for any help/suggestions.

Hi wklove,
In order to do vision with LabVIEW you need to to have the Vision development module and have NI Vision Acquisition Software (VAS) installed. It sounds like you are missing VAS you can download it here. Once you have this installed you should be able to see your camera in Measurement and Automation (MAX). After you are able to see the camera, take a look at the NI Example Finder by going to Help » Find Examples
Joe Daily
National Instruments
Applications Engineer
may the G be with you ....

Raspberry Pi B+ capture a image from a video cam

Hello,
is there any way to capture a image from the video camera. I didn't find any media class for video. Nor did I find any Runtime.exec to use a native linux command.
Did I overseen something?

Hi Klaus,
There a few ideas in design stage, but nothing solid enough to talk about. And actually it should not have been possible with older ME as it's specifically prohibited by the spec. I mean native methods in Java applications. Of course there may be other means to communicate with native applications, like files, sockets etc. But no direct calls
The date for ME 8.1 GA (General Availability) release is not confirmed yet. But it should happen quite soon, stay tuned
Regards.
Andrey

Problem with capture image from wc

hi all, i want to capture image from my webcam and play it, but it's not work
please help me, here's code
public class Demo extends JFrame {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          Demo demo = new Demo();
     public Demo() {
          super();
          int a=30;
          final JPanel panel = new JPanel();
          getContentPane().add(panel, BorderLayout.CENTER);
          setVisible(true);
          DataSource dataSource = null;
          PushBufferStream pbs;
          Vector deviceList = CaptureDeviceManager.getDeviceList(new VideoFormat(null));
          CaptureDeviceInfo deviceInfo=null;boolean VideoFormatMatch=false;
          for(int i=0;i<deviceList.size();i++) {
          // search for video device
          deviceInfo = (CaptureDeviceInfo)deviceList.elementAt(i);
          if(deviceInfo.getName().indexOf("vfw:/")<0)continue;
          VideoFormat videoFormat=new VideoFormat("YUV");
          System.out.println("Format: "+ videoFormat.toString());
          Dimension size= videoFormat.getSize();
          panel.setSize(size.width,size.height);
          MediaLocator loc = deviceInfo.getLocator();
          try {
               dataSource = (DataSource) Manager.createDataSource(loc);
               // dataSource=Manager.createCloneableDataSource(dataSource);
               } catch(Exception e){}
               Thread.yield();
               try {
                    pbs=(PushBufferStream) dataSource.getStreams()[0];
                    ((com.sun.media.protocol.vfw.VFWSourceStream)pbs).DEBUG=true;
                    } catch(Exception e){}
                    Thread.yield();
                    try{dataSource.start();}catch(Exception e){System.out.println("Exception dataSource.start() "+e);}
                    Thread.yield();
                    try{Thread.sleep(1000);}catch(Exception e){} // to let camera settle ahead of processing
}

iTool wrote:
hi all, i want to capture image from my webcam and play it, but it's not workThat's a very descriptive error message, "it's not work". Everyone on the board will certainly be able to help you out with that.
The first error I see is that you're using the CaptureDeviceManager in an applet. If T.B.M pops in here, he can tell you why that's going to be a CF 99% of the time.
The other error I see is that your code looks absolutely nothing like any working JMF webcam capture code I've personally ever seen.
Lastly, the big one, even if you were somehow capturing video magically, you're not even trying to display it...so I'm not entirely sure why you expect to see anything with the code you just posted.
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/JVidCap.html]
Your best bet would be starting over and using the example code from the page linked above.

When capturing images from a Nikon D600, they show in Bridge, but when clicked to load into CS6,an error message says that it is the wrong type of document, even jpeg files. This is a NEW frustration.

When capturing images from a Nikon D600, they show in Bridge, but when clicked to load into CS6,an error message says that it is the wrong type of document, evne jpeg files. This is a NEW frustration.

Nikon raw files would open up in Adobe Camera Raw and so should jpegs.
If you select one in Bridge and give the command "Ctrl r" (Windows), what happens?
Also what is the version of ACR in the title bar?
Gene
Note: unmark your question as "answered". the green balloon next to the subject shows it as "solved".

Capturing image from Webcam

Hi,
Is there any way in which Java can be used to capture images from the webcam and save it to a predefined image file name?
Any examples out there?
Alternatively, I could have the application written in other languages, but still, I would need my main Java app to launch this external app.
Thanks alot.

Hi,
Is there any way in which Java can be used to capture
images from the webcam and save it to a predefined
image file name?
Any examples out there?
Alternatively, I could have the application written in
other languages, but still, I would need my main Java
app to launch this external app.
Thanks alot.Yes, the ExampleSave from the JavaTwain package at http://www.gnome.sk does this job :)
If you just want to see how Java Twain works with your webcam (works with a scanner too):
- java (1.2 or higher for Windows, 1.3 or higher for Mac OS X) has to be installed on your computer
- a scanner or camera has to be installed on your computer
- download the trial package from http://www.gnome.sk
- unzipp it
- go to the examples directory of the unzipped package
- in Windows: doubleclick the runExampleShow.bat
- in MacOS:
- open the Terminal window
- change the working directory to the examples
- run .sh file (type ExampleShow.sh or sh ExampleShow.sh)
This will pop up the Twain Source Selection user interface. There, all your scanners and cameras which do have a twain driver should be listed. (About 90% of scanners and cameras on the market do have a twain driver for Windows, only a few do have a twain driver for MacOS.) Select one of them. The user interface of the selected scanner (camera) will appear. Confirm the scanning (you can set the scanning parameters first). The scanned image will be displayed in a separate window. To end the application, close that window.
Running different examples, you can test scanning with hidden UI, saving the scanned image, using ADF, ...
If there is any problem, do not hesitate to inquire about it at the technical support, email: [email protected] . I am the member of the staff :)
Erika Kupkova

Capture image from isight

What is the best way to capture images from iSight using Applescript ?

erritikamathur wrote:
What is the best way to capture images from iSight using Applescript
(1) Depending on what you want to do, you may be able to use your "Automator" application to make your scripts instead (Automator calls them "workflows".)
When you launch Automator, you can immediately select the "Photos & Images" as a starting point to see if it will meet your needs by selecting "my Computer's Camera" in the "Get content from:" choices bar there.
For more info on Automator, start with Mac 101: Automator and then launch Automator on your Mac and use its Automator > Help as needed.
(2) If you really need to use AppleScript, you need to understand that you script applications (such as iChat), not devices (like iSight.) Therefore, first decide what you want to do with your iSight. Click -> here to see a list of some applications that can operate your iSight.
Once you have decided what you want to do, launch your Mac's AppleScript Script Editor.
Next, open Script Editor's Library window to see a list of Apple apps that are scriptable. Those that can control iSight include iChat, iMovie, and iPhoto. Double-click on one of the apps of interest to see the dictionary of functions that can be scripted in that application. Reviewing the library for any app will help you determine whether the functions you want to control can be scripted in that app. If not, you need to find another app that can control that function, develop an alternate process flow that can be scripted, or look for a way to accomplish your task other than with AppleScript.
Some third party apps may also be scriptable. See the documentation or support info for particulars directly from the developers of those apps.
More help is available from a variety of sources. For instance, you can check your Mac's Help on specific applications to see if they contain info on automating them. One specific example is iChat > Help, which gives a good start on your iChat study.
Unless you already know how to use AppleScript, you may also need to do some more general study or perhaps take advantage of the Apple training series book available from the Apple Store.
EZ Jim
G5 DP 1.8GHz w/Mac OS X (10.5.7) PowerBook 1.67GHz (10.4.11) iBookSE 366MHz (10.3.9) External iSight

Capturing images from two web camera in real time

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