JAVACV：使用javacv捕捉摄像头

Question

尝试使用JAVACV库从网络摄像头捕捉。但它会抛出一个UnsatisfiedLinkError。 堆栈跟踪如下：

Exception in thread "main" java.lang.UnsatisfiedLinkError: 
C:\Users\anooj\AppData\Local\Temp\javacpp7955905460040\jniopencv_core.dll: %1 is not a valid Win32 application 
at java.lang.ClassLoader$NativeLibrary.load(Native Method) 
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1928) 
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1825) 
at java.lang.Runtime.load0(Runtime.java:792) 
at java.lang.System.load(System.java:1059) 
at com.googlecode.javacpp.Loader.loadLibrary(Loader.java:418) 
at com.googlecode.javacpp.Loader.load(Loader.java:368) 
at com.googlecode.javacpp.Loader.load(Loader.java:315) 
at com.googlecode.javacv.cpp.opencv_core.<clinit>(opencv_core.java:131) 
at java.lang.Class.forName0(Native Method) 
at java.lang.Class.forName(Class.java:264) 
at com.googlecode.javacpp.Loader.load(Loader.java:334) 
at com.googlecode.javacv.cpp.opencv_imgproc.<clinit>(opencv_imgproc.java:96) 
at java.lang.Class.forName0(Native Method) 
at java.lang.Class.forName(Class.java:264) 
at com.googlecode.javacpp.Loader.load(Loader.java:334) 
at com.googlecode.javacv.cpp.opencv_highgui.<clinit>(opencv_highgui.java:91) 
at com.googlecode.javacv.OpenCVFrameGrabber.start(OpenCVFrameGrabber.java:170) 
at javaapplication16.JavaApplication16.captureframe(JavaApplication16.java:24) 
at javaapplication16.JavaApplication16.main(JavaApplication16.java:38) 
Java Result: 1 

我们的代码如下：

import com.googlecode.javacv.OpenCVFrameGrabber; 
import com.googlecode.javacv.cpp.opencv_core.IplImage; 
import static com.googlecode.javacv.cpp.opencv_highgui.cvSaveImage; 

public class JavaApplication16 { 

/** 
* @param args the command line arguments 
*/ 
    public static void captureframe() 
    { 
     OpenCVFrameGrabber grabber=new OpenCVFrameGrabber(0); 
     try 
     { 
      grabber.start(); 
      IplImage img=grabber.grab(); 
      if(img!=null) 
      { 
       cvSaveImage("capture.jpg", img); 
      } 
     } 
     catch(Exception ae) 
     { 
      ae.printStackTrace(); 

     } 
    } 
    public static void main(String[] args) { 
     captureframe(); 
    }  
} 

Answer 1

链路建议 看到此链接为您解决了Link1

错误查看该程序的链接以从相机捕捉图像，将其保存为JPG格式并在画布上显示它Link2

希望它解决您的查询。

Answer 2

• 确保你已经正确安装了Microsoft Visual C++可再发行组件包 和设置PATH变量。以下链接解释了所有 必要步骤
  http://opencvlover.blogspot.in/2012/04/javacv-setup-with-eclipse-on-windows-7.html

• 使用VideoInputFrameGrabber代替OpncvFrameGrabber如下 http://code.google.com/p/javacv/wiki/Windows7AndOpenCV#I_cannot_capture_from_my_Webcam_using_opencv_highgui_or_OpenCVFr

Answer 3

请记住，openCV和javaCV的版本必须匹配。 下载最新版本的OpenCV 2..46 http://opencv.org/downloads.html

和下载javacp https://code.google.com/p/javacv/downloads/list [注：选择javacv-0.6-cppjars.zip 85.0 MB]

在这种情况下，你不会得到在线程异常“主“java.lang.UnsatisfiedLinkError：

我的代码运行成功。