OpenCV + Java = UnsatisfiedLinkError [英] OpenCV + Java = UnsatisfiedLinkError

问题描述

我需要从我的USB网络摄像头捕获视频流，为此我使用Opencv 2.4.6进行Java开发。我按照此处中列出的步骤进行操作

I need capture a video stream from my USB webcam, for this i use Opencv 2.4.6 for developing in Java. I follow the steps listed in here

我将C：\ openncv \ build \ java \ x64目录添加到我的系统路径中，并在我的库中包含opencv-246.jar文件关于ECLIPSE。当你运行解释时

I add the "C:\opencv\build\java\x64" dir to my System PATH and include the "opencv-246.jar" file into my libraries on ECLIPSE. When y run the explame

import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;

public class Main {
    public static void main(String[] args) {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        Mat m  = Mat.eye(3, 3, CvType.CV_8UC1);
        System.out.println("m = " + m.dump());
    }
}

我得到

m = [1, 0, 0;
  0, 1, 0;
  0, 0, 1]

OK =）

但是当我运行时

import org.opencv.highgui.VideoCapture;

public class Main {
    public static void main(String[] args) {
        VideoCapture vc = new VideoCapture(0);
        if(vc.isOpened()){
            System.out.println("Works!");
        }
    }
}

我得到

Exception in thread "main" java.lang.UnsatisfiedLinkError: org.opencv.highgui.VideoCapture.n_VideoCapture(I)J
    at org.opencv.highgui.VideoCapture.n_VideoCapture(Native Method)
    at org.opencv.highgui.VideoCapture.<init>(VideoCapture.java:113)
    at Main.main(Main.java:5)

我添加所有包含的路线：

i add all the routes containes in:

C：\ openncv \ build \ x64 \ vc10

C:\opencv\build\x64\vc10

one by一个，但不起作用。

one by one,but doesn`t work.

最后我创建一个名为OPENCV_DIR的变量，其中包含C：\ opencv \ build \ x64 \ vc10但仍然得到UnsatisfiedLinkError。

Finally i create a variable called OPENCV_DIR with C:\opencv\build\x64\vc10 but still getting UnsatisfiedLinkError.

请帮助我！

推荐答案

在你的第二个例子中，你跳过这一行

in your second example , you skipped this line

 System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

所以opencv libs没有加载，UnsatisfiedLinkError等......

so the opencv libs werent loaded, UnsatisfiedLinkError, etc...

：

感谢@Jishnu Prathap突出显示java.library路径问题，如果遇到问题设置，你可以仍然尝试使用java包装器的绝对路径，所以/ dll / dylib就像：

thanks to @Jishnu Prathap for highlighting the java.library path issue, if you run into problems setting that, you can still try to use an absolute path to the java wrapper so/dll/dylib like:

 System.load("/path to/our/java_wrapper");

这篇关于OpenCV + Java = UnsatisfiedLinkError的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！