Setup JavaCV in Windows 7

the user manual is also applicable for 2.4+ versions of OpenCV and JavaCV

I searched libraries for image processing in Java. I recommend JavaCV.
JavaCV provides wrappers for OpenCV, so you can directly use OpenCV functions in Java.
Let's define a few steps that you should perform to install JavaCV in Windows 7.



the

Step 1

the Installed Java Development Kit (JDK) here. Please note CPU architecture (x32/x64).

the

Step 2

Install Redistributable Microsoft Visual C++:
Microsoft Visual C++ 2010 Redistributable Package (x86)
Microsoft Visual C++ 2010 Redistributable Package (x64)

the

Step 3

Pass the link, select the version of OpenCV and downloadable *-super-pack.exe. Here we will download a self-extracting archive after the finish unpack it wherever you want.

the

Step 4

We now have a step of adding the OpenCV .dll to path to JavaCV knew where to look.
Go to the Control Panel (control Panel) > System () > Advanced System Settings (advanced system settings) > Environment Variables (environment Variables) — I have Windows in English, so my translation may be a little different, but the meaning remains the same. In System variable (System variables) select path and click Edit (Edit). Now add to the end of the line after the sign ";" the address of the location of OpenCV .dll. Just unpack the downloaded archive at: D:\opencv and show by example. If you have unpacked otherwise, insert your location:

For OpenCV 2.4.2 and earlier:

x32
D:\opencv\build\x86\vc10\bin; D:\opencv\build\common\tbb\ia32\vc10\
x64:
D:\opencv\build\x64\vc10\bin; D:\opencv\build\common\tbb\intel64\vc10\

For OpenCV 2.4.3 and later:

x32
D:\opencv\build\x86\vc10\bin
x64:
D:\opencv\build\x64\vc10\bin



And after this restart your computer!

the

Step 5

Downloaded JavaCV-bin here and unpacking.

NOTE: versions of JavaCV and OpenCV should be compatible! Valid version of OpenCV and other requirements can be found in the Readme file in the folder with JavaCV!



the

Step 6

Now you can create a Java project 'demo' in Eclipse.
Further seguem вProject > Properties > Java Build Path > Libraries > Add External JARs, then in your JavaCV folder and add all jar files.



the

Step 7

Now create demo.java in the src folder of our project.
Insert the following code:

the

import static com.googlecode.javacv.cpp.opencv_highgui.cvLoadImage;

import java.io.File;

import javax.swing.JFileChooser;

import com.googlecode.javacv.CanvasFrame;
import com.googlecode.javacv.cpp.opencv_core.IplImage;

public class demo {

public static void main(String[] args) {

String path = null; // file path
JFileChooser fileChooser = new JFileChooser();

/* the file selection window */
int ret = fileChooser.showDialog(null, "Open file");
if (ret == JFileChooser.APPROVE_OPTION) {

/* get file path */
path = fileChooser.getSelectedFile().getPath();
}

/* open the image */
final IplImage image = cvLoadImage(path);

/* create frame */
final CanvasFrame canvas = new CanvasFrame("Demo");

/* show the picture in our frame */
canvas.showImage(image);
canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE); // close
// frame
// crestcom!
}
}

the

Step 8

measurement...



Thank you.

Article based on information from habrahabr.ru