[NotInControl]

Originally Posted by lopsided98

I just tried this out today using the Java libraries and I got it to work.

After installing OpenCV to the roboRIO via the instructions on GitHub, I had to do some more work to make it work in Java.

First I had to add:

<var name="classpath" value="${classpath}:/path/to/opencv-2410.jar" />

to the end of the build.xml in the robot code Eclipse project (add it just before the closing </project> tag). This includes the OpenCV classes in the jar file that is uploaded to the roboRIO.

To load the native library in the robot code I had to add this line:

System.load("/usr/local/lib/lib_OpenCV/java/opencv_java2410.so");

Put this somewhere where it will get executed before any OpenCV code (ie. static initializer). The path will obviously be different if you installed OpenCV somewhere else on the roboRIO.

I was able to capture and stream an image from the Microsoft Lifecam HD3000, but it is at a very low resolution and I can't seem to change it. The same code works fine in Linux on my laptop. I'll see if I can figure more out tomorrow.

This is awesome news. I haven't had the time to test out Java myself (it is 1 item on a long to-do list of mine, but glad to hear it is working for you.

If you are having trouble changing the camera settings, try using the patch we added to OpenCV, we modified some of the v4l calls and exposed a new constructor to the videoCap class.

You can work off of the C++ example here: which will allow you to set FPS, image size, and some quality settings.

https://github.com/Team2168/2168_Vis....cpp#L633-L664

Let me know if this works for you or not.