Question

我使用javacv编写了java中的运动检测代码，它完全在Windows上运行，但在Ubuntu 13.04中它显示错误，请为此建议解决方案，我附加代码 的

代码

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package demo;

/**
 *
 * @author Admin
 */
import com.googlecode.javacpp.Loader;
import com.googlecode.javacv.*;
import static com.googlecode.javacv.cpp.opencv_core.*;
import static com.googlecode.javacv.cpp.opencv_imgproc.*;
import static com.googlecode.javacv.cpp.opencv_calib3d.*;
import static com.googlecode.javacv.cpp.opencv_objdetect.*;

public class Demo {
    public static void main(String[] args) throws Exception {
        OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0);
        grabber.start();

        IplImage frame = grabber.grab();
        IplImage image = null;
        IplImage prevImage = null;
        IplImage diff = null;

        CanvasFrame canvasFrame = new CanvasFrame("Original stream");
        canvasFrame.setCanvasSize(frame.width(), frame.height());

        CanvasFrame editFrame = new CanvasFrame("Edited stream");
        canvasFrame.setCanvasSize(frame.width(), frame.height());

        CvMemStorage storage = CvMemStorage.create();

        while (canvasFrame.isVisible() && (frame = grabber.grab()) != null) {
            //cvSmooth(frame, frame, CV_GAUSSIAN, 9, 9, 2, 2);
            if (image == null) {
                image = IplImage.create(frame.width(), frame.height(), IPL_DEPTH_8U, 1);
                //cvCvtColor(frame, image, CV_RGB2GRAY);
            } else {
                prevImage = IplImage.create(frame.width(), frame.height(), IPL_DEPTH_8U, 1);
                prevImage = image;
                image = IplImage.create(frame.width(), frame.height(), IPL_DEPTH_8U, 1);
                cvCvtColor(frame, image, CV_RGB2GRAY);
            }

            if (diff == null) {
                diff = IplImage.create(frame.width(), frame.height(), IPL_DEPTH_8U, 1);
            }

            if (prevImage != null) {
                // perform ABS difference
                cvAbsDiff(image, prevImage, diff);
                // do some threshold for wipe away useless details
                cvThreshold(diff, diff, 64, 255, CV_THRESH_BINARY);

                canvasFrame.showImage(frame);
                editFrame.showImage(diff);

            }
        }
        grabber.stop();
        canvasFrame.dispose();
    }
}

输出：

sx = 158sy = 37w = 350h = 350op7线程“main”中的异常 java.lang.UnsatisfiedLinkError中： /tmp/javacpp94368173067/libjniopencv_core.so:libopencv_core.so.2.4：无法打开共享对象文件：没有这样的文件或目录 java.lang.ClassLoader $ NativeLibrary.load（Native Method）at java.lang.ClassLoader.loadLibrary1（ClassLoader.java:1957）at java.lang.ClassLoader.loadLibrary0（ClassLoader.java:1882）at java.lang.ClassLoader.loadLibrary（ClassLoader.java:1843）at java.lang.Runtime.load0（Runtime.java:795）at java.lang.System.load（System.java:1061）at com.googlecode.javacpp.Loader.loadLibrary（Loader.java:566）at at com.googlecode.javacpp.Loader.load（Loader.java:489）at com.googlecode.javacpp.Loader.load（Loader.java:431）at com.googlecode.javacv.cpp.opencv_core。（opencv_core.java:136） at java.lang.Class.forName0（Native Method）at java.lang.Class.forName（Class.java:270）at com.googlecode.javacpp.Loader.load（Loader.java:453）at com.googlecode.javacv.cpp.opencv_imgproc。（opencv_imgproc.java:97） at java.lang.Class.forName0（Native Method）at java.lang.Class.forName（Class.java:270）at com.googlecode.javacpp.Loader.load（Loader.java:453）at com.googlecode.javacv.cpp.opencv_highgui。（opencv_highgui.java:85）在 com.googlecode.javacv.OpenCVFrameGrabber.start（OpenCVFrameGrabber.java:174）在demo1.Demo1.main（Demo1.java:187）引起： java.lang.UnsatisfiedLinkError：java.library.path中没有opencv_core 在java.lang.ClassLoader.loadLibrary（ClassLoader.java:1878）at java.lang.Runtime.loadLibrary0（Runtime.java:849）at java.lang.System.loadLibrary（System.java:1087）at com.googlecode.javacpp.Loader.loadLibrary（Loader.java:593）at at com.googlecode.javacpp.Loader.load（Loader.java:481）... 12更多Java 结果：1建立成功（总时间：0秒）

Answer 1

在终端中尝试“echo $ PATH”命令，确保计算机上opencv * .dll文件的路径是否存在。

Answer 2

它的意思是它无法找到本机依赖项。 JavaCV在内部使用JNI调用来使用OpenCV dll。在Windows上，依赖关系在路径上（可能有多种原因，opencv可能在环境变量或某些资源中）。

我建议通过这个浏览linux：https://code.google.com/p/javacv/

java.lang.UnsatisfiedLinkError / tmp / javacpp94368173067 / libopencv_core.so.2.4：无法打开共享对象文件：没有这样的文件或目录

2 个答案: