找不到依赖库 javaCV

Question

我有这样的代码:

package javacv;
import static com.googlecode.javacv.cpp.opencv_core.*;
import static com.googlecode.javacv.cpp.opencv_imgproc.*;
import static com.googlecode.javacv.cpp.opencv_highgui.*;
import javax.swing.JOptionPane;
/**
 *
 * @author (Mahdi)
 */
public class JavaCv {
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        try {
              IplImage img = cvLoadImage("mehdi.jpg");  
                cvShowImage("Hellow", img);
                cvSmooth(img, img, CV_GAUSSIAN, 13);
                cvShowImage("Blur", img);
                cvWaitKey();
                cvReleaseImage(img);
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, e.getMessage());
        }

    }
}

运行后抛出这个异常:

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:Users(Mahdi)AppDataLocalTempjavacpp66820482987315jniopencv_core.dll: Can't find dependent libraries
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1939)
    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1864)
    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:566)
    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.<clinit>(opencv_core.java:136)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at com.googlecode.javacpp.Loader.load(Loader.java:453)
    at com.googlecode.javacv.cpp.opencv_imgproc.<clinit>(opencv_imgproc.java:97)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at com.googlecode.javacpp.Loader.load(Loader.java:453)
    at com.googlecode.javacv.cpp.opencv_highgui.<clinit>(opencv_highgui.java:85)
    at javacv.JavaCv.main(JavaCv.java:23)
Caused by: java.lang.UnsatisfiedLinkError: no opencv_core244 in java.library.path
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1860)
    at java.lang.Runtime.loadLibrary0(Runtime.java:845)
    at java.lang.System.loadLibrary(System.java:1084)
    at com.googlecode.javacpp.Loader.loadLibrary(Loader.java:593)
    at com.googlecode.javacpp.Loader.load(Loader.java:481)
    ... 11 more
Java Result: 1

任何想法?

Answer 1

Java正在尝试在${Java .library中查找所需的dll。Path}，但它没有定义。所以你应该:

1. 设置opencv_java244.dll的位置在%PATH% ("c:opencvbuildjavax64"为例)。
2. 创建在你的项目目录"lib"目录。
3. 把:
   • javacpp.jar
   • javacv.jar
   • javacv-windows-x86_64.jar
   • opencv-2.4.4-windows-x86_64.jar
   • opencv - 244. - jar

如果你的平台是32位，那么使用*x86.jar版本。

然后你可以使用opencv/samples/java/ant/中修改过的ant脚本来运行你的应用程序:

<project name="JavaCv" basedir="." default="rebuild-run">
<property name="src.dir" value="src"/>
<property name="lib.dir" value="lib"/>
<path id="classpath">
    <fileset dir="${lib.dir}" includes="**/*.jar"/>
</path>
<property name="build.dir"   value="build"/>
<property name="classes.dir" value="${build.dir}/classes"/>
<property name="jar.dir"     value="${build.dir}/jar"/>
<property name="main-class"  value="${ant.project.name}"/>

<target name="clean">
    <delete dir="${build.dir}"/>
</target>
<target name="compile">
    <mkdir dir="${classes.dir}"/>
    <javac includeantruntime="false" srcdir="${src.dir}" destdir="${classes.dir}" classpathref="classpath"/>
</target>
<target name="jar" depends="compile">
    <mkdir dir="${jar.dir}"/>
    <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
        <manifest>
            <attribute name="Main-Class" value="${main-class}"/>
        </manifest>
    </jar>
</target>
<target name="run" depends="jar">
    <java fork="true" classname="${main-class}">
        <classpath>
            <path refid="classpath"/>
            <path location="${jar.dir}/${ant.project.name}.jar"/>
        </classpath>
    </java>
</target>
<target name="rebuild" depends="clean,jar"/>
<target name="rebuild-run" depends="clean,run"/>

或者您可以定义${java.library。路径}在你的ant脚本中，像这样:

<target name="run" depends="jar">
    <java fork="true" classname="${main-class}">
        <sysproperty key="java.library.path" path="PUT_YOUR_PATH_HERE"/>
        <classpath>
            <path refid="classpath"/>
            <path location="${jar.dir}/${ant.project.name}.jar"/>
        </classpath>
    </java>
</target>

Answer 2

您是否尝试将opencv目录提取为c:opencv?

Answer 3

java cv和OpenCV版本有问题

如果你使用OpenCV 2.4.7，那么你应该使用javacv 0.6，如果你使用OpenCV 2.4.8，那么你应该使用javacv 0.7。