Add the following dependency in your POM file:

<dependency>
    <groupId>org.openpnp</groupId>
    <artifactId>opencv</artifactId>
    <version>3.2.0-0</version>
</dependency>

and replace the following lines:

System.loadLibrary(Core.NATIVE_LIBRARY_NAME)

with

nu.pattern.OpenCV.loadShared();

This should solve the problem in WINDOWS also. Happy Coding.

I found solution.

First, I changed in the pom.xml like the following. This jar comes from Maven Central Repository.

    <dependency>
        <groupId>org.openpnp</groupId>
        <artifactId>opencv</artifactId>
        <version>3.4.2-1</version>
    </dependency>

And then I added @Configuration java file like the following.

@Configuration
public class NativeLoadingConfiguration {
    static {
        nu.pattern.OpenCV.loadShared();
    }
}

At last I eliminated "System.load(native dll)" from Test.java file,

and eliminated "opencv_348.jar" and "opencv_java348.dll" from the system.

That's it.