Question

尝试使用JAVACV库从网络摄像头捕获。但它抛出一个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

确保您已安装Microsoft Visual C ++ Redistributable 包和设置路径变量正确。以下链接解释了所有必要的步骤
http://opencvlover.blogspot.in/2012/04/javacv-setup-with-eclipse-on-windows-7.html
建议使用VideoInputFrameGrabber而不是OpncvFrameGrabber 在下面的链接中 http://code.google.com/p/javacv/wiki/Windows7AndOpenCV#I_cannot_capture_from_my_Webcam_using_opencv_highgui_or_OpenCVFr

Answer 2

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

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

在这种情况下，你不会在线程“main”中获得异常java.lang.UnsatisfiedLinkError：

我的代码已成功运行。

Answer 3

请参阅此链接以解决您遇到的错误Link1

请参阅此链接，以便程序从相机捕获图像，以JPG格式保存并在画布上显示Link2

希望它能解决您的问题。

JAVACV：使用javacv捕获网络摄像头

3 个答案: