JAVA Camera Call _ Instance---Win7__java

Original address: http://blog.csdn.net/zajin/article/details/9288239

I rookie-level characters, due to make personal face recognition login (JAVACV), Baidu Google one afternoon, find a simple sample code on the Internet to try, but always debugging, however, appear capturedevicemanager.getdevice as a null pointer. Depressed for an afternoon. Now I finally got it out. This is a souvenir, because on the internet for most of the day, found that this aspect of the introduction is not a lot, so also hope to be able to help the later learners, less take detours.

Function: Implement camera call

Steps: 1, to the Sun download JMF, and installation, after installation need to restart the computer. Download link http://www.oracle.com/technetwork/java/javase/download-142937.html

2. Create environment variables for setting JMF, "Computer"-> "System Properties"-> "Advanced Environment Settings"-> "Advanced"-> "Environment variables"

Variable name: "jmfhome" Variable Value: "C:\Program files\jmf2.1.1e"

Variable name: "CLASSPATH" Variable Value: ";%jmfhome%\lib\jmf.jar;%jmfhome%\lib\sound.jar"

As shown in figure:

3, open the installed JMF, in the C:\Program Files\jmf2.1.1e\bin directory to open "Jmfregistry.exe", select "Capture Devices" and then press the lower left corner "detect Capture Devices button, press a few more times until the "Vfw:microsoft WDM Image Capture (WIN32): 0" appears in the left-hand column, which means that JMF has registered the camera and can then be closed.

As shown in figure:

4, now you can program with Eclipse. Create a project, copy the sample code below, click the right mouse button to select Build path->configure builds path ...->libraries->add External JARs ... Then the installation of the JMF inside the \lib directory to import a few jar packages in.

As shown in figure:

5, the operation can be.

[Java]  View plain copy import java.awt.borderlayout;   import java.awt.component;   import javax.media.capturedeviceinfo;   import javax.media.manager;   import  javax.media.medialocator;   import javax.media.player;   import  javax.media.cdm.capturedevicemanager;   import javax.swing.jframe;   import  javax.swing.jpanel;   public class test extends jframe{        public  static Player player = null;        private CaptureDeviceInfo deviceInfo = null;        private medialocator medialocator = null;       private  component component = null;       private JPanel  vediopanel = null;              String   str1    =    "vfw:logitech   usb   video   camera:0";       //get USB Webcam string        String    str2   =    "vfw:microsoft wdm image capture  (WIN32): 0";     //get the local webcam string        // Creates a new  instance of cameratest        public test ()  {            init ();       }       public void init () {            deviceinfo = capturedevicemanager.getdevice (STR2);   //acquisition Device (camera) reference based on string       &NBSp;  //   system.out.println (deviceinfo);          //Displays the information         //   system.out.println of the Acquisition Device (camera) ( Deviceinfo.getname ())      //Display acquisition device (camera) device name             medialocator = deviceinfo.getlocator ();  //obtain a reference to the locator of the acquisition device, you need to create a video player based on this reference                       &nbs