opencv - 找不到依赖库javacv

我有这个代码:

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());
        }



    }
}

运行后抛出此异常:

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Users\(Mahdi)\AppData\Local\Temp\javacpp66820482987315\jniopencv_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？

最佳答案

Java 试图在 ${java.library.path} 中找到所需的 dll，但它没有定义。
所以你应该:

在 %PATH% 中设置 opencv_java244.dll 的位置(例如“c:\opencv\build\java\x64\”)。

在您的项目目录“lib”目录中创建。

放在那里:

javacpp.jar

javacv.jar

javacv-windows-x86_64.jar

opencv-2.4.4-windows-x86_64.jar

opencv-244.jar

如果您的平台位数为 32，则使用 *x86.jar 版本。

然后你可以使用来自 opencv/samples/java/ant/的这个修改过的 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"/>

或者你可以像这样在你的 ant 脚本中定义 ${java.library.path} :

<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>

关于opencv - 找不到依赖库javacv，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15310129/