用eclipse集成opencv+java最高效的方法

First, obtain a fresh release of OpenCV from download page and extract it under a simple location like C:/OpenCV-2.4.6/. I am using version 2.4.6, but the steps are more or less the same for other versions.

Now, we will define OpenCV as a user library in Eclipse, so we can reuse the configuration for any PRoject. Launch Eclipse and select Window –> Preferences from the menu.

Navigate under java –> Build Path –> User Libraries and click New....

Enter a name, e.g. OpenCV-2.4.6, for your new library.

Now select your new user library and click Add External JARs....

Browse through C:/OpenCV-2.4.6/build/java/ and select opencv-246.jar. After adding the jar, extend the opencv-246.jar and select Native library location and press Edit....

Select External Folder... and browse to select the folder C:/OpenCV-2.4.6/build/java/x64. If you have a 32-bit system you need to select the x86 folder instead of x64.

Your user library configuration should look like this:

Testing the configuration on a new Java project

Now start creating a new Java project.

On the Java Settings step, under Libraries tab, select Add Library... and select OpenCV-2.4.6, then click Finish.

Libraries should look like this:

Now you have created and configured a new Java project it is time to test it. Create a new java file. Here is a starter code for your convenience:

import org.opencv.core.Core;import org.opencv.core.CvType;import org.opencv.core.Mat;public class Hello{   public static void main( String[] args )   {      System.loadLibrary( Core.NATIVE_LIBRARY_NAME );      Mat mat = Mat.eye( 3, 3, CvType.CV_8UC1 );      System.out.println( "mat = " + mat.dump() );   }}
When you run the code you should see 3x3 identity matrix as output.
That is it, whenever you start a new project just add the OpenCV user library that you have defined to your project and you are good to go. Enjoy your powerful, less painful development environment :)