a7ul / imshow-java-opencv

an alternative to imshow() in C++ OpenCV for Java OpenCV

ImShow-Java-OpenCV

An alternative to imshow() in C++ OpenCV for Java OpenCV. Basically helps to display the Mat images or Video in the Java - Opencv which lacks imshow like API from C++ Opencv interface.

Usage:

Simply Add the Imshow.jar or the project to the build path of your Project

API:

Imshow im = new Imshow("Title");

im.showImage(Mat mat); // This will display the mat Image in the GUI

See the example for understanding it better: example: Displaying the Video From the WebCam

For ways to customise the GUI Frame or Window see the example.

Credits / Special Thanks:

Daniel Baggio , Jan Monterrubio and sutr90 for improvements

Note:

** Please make sure OpenCV is also in the build path

TroubleShoot:

1. Make sure that opencv is in your build path.

2. If you get an error like this: Exception in thread "main" java.lang.UnsatisfiedLinkError: no opencv_java248 in java.library.path

Please configure your build path . In the build path , under libraries -> opencv-248.jar -> set your native library location to : .../opencv2.4.8/release/lib

imshow-java-opencv's Issues

Closing window does not end process

When you display the window with image and then click the X button the window disappear but the Swing thread is still running in background. That is not desirable outcome. To fix this I would suggest adding following code:

frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

For more informations on this topic see this thread:
http://stackoverflow.com/questions/7799940/jframe-exit-on-close-java

Incompatible with OpenCV 3.0 or greater

When running the showImage() method in OpenCV 3.0 or greater, an exception is returned:

Exception in thread "Thread-0" java.lang.NoClassDefFoundError: org/opencv/highgui/Highgui

This is because Highgui has been removed in opencv 3.0 and split into two different packages - see this stackexchange for more details http://stackoverflow.com/questions/25059576/highgui-is-missing-from-opencv-3-0-0-jar