Re: Tower Tracker 1.0
 

you can do this on $35 Raspberry pi and save critical RoboRio resources

see this

Look here for tracking shronghold goalpost
http://www.mindsensors.com/blog/how-...our-frc-robot-

Re: Tower Tracker 1.0
 

if your trying to advertise atleast make sure the link works...

Re: Tower Tracker 1.0
 

I'm still gonna try to see what I can do with the Rio. I just have no idea what I'm doing when it comes to cross compiling huge C++ projects and make files and shared libraries and all of that stuff.

Re: Tower Tracker 1.0
 

You, sir, just made my day. Been trying to figure out how to build a more up-to-date version of OpenCV for two days now, and realized I have no idea what I'm doing. You RobotPy people really rock.

Now, would you be willing to help me setup my build environment for cross compiling an OpenCV program in C++ that will use the shared libs on the RoboRio (preferably in Eclipse)?


EDIT: Information on setting up build environment is avaible on the latest release on gituhub. Wow, that was easy!

Re: Tower Tracker 1.0
 

Can this work with usb cameras?

Re: Tower Tracker 1.0
 

*My java opencv is a little rusty*

Here is how you use a use camera with the opencv libraries and store the image in the data type Mat.

VideoCapture camera = new VideoCapture(0);

Mat frame = new Mat();
camera.read(frame);

instead of

videoCapture = new VideoCapture();
//replaces the ##.## with your team number videoCapture.open("http://10.##.##.11/mjpg/video.mjpg");

Re: Tower Tracker 1.0
 

Yes, if you are going to use a usb webcam I would recommend mjpeg streamer and running it off of the driverstation.

Re: Tower Tracker 1.0
 

Re: Tower Tracker 1.0
 

My team is trying to use your code to test our vision but every time we run the executable JAR file we get two errors-
"Error opening file </build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:578>" and when we try to use the network table, we get the error "NT: Error: could not resolve roborio-3929.local address <TCPConnecotr.cpp:93>". We've installed opencv 3.1 and we are able to stream camera output to the dashboard. We are using the microsoft livecam 3000. Any help would be appreciated. Thanks!

Re: Tower Tracker 1.0
 

Re: Tower Tracker 1.0
 

If its having problems with the ffmpeg you need to download opencv and follow my instructions at the top of this thread. I decribe what you have to do after installing it. As for the microsoft usb camera you have to use whats called mjpeg streamer. It takes a usb webcam and outputs the feed to a web page in which you can call later.

Did you extract the program into a runnable jar and then put it in a folder with the files similar to the screenshot i included?

Re: Tower Tracker 1.0
 

We figured out what the problem was with why it won't run. We needed to put the Open CV jar file in with system 32.

Re: Tower Tracker 1.0
 

that or you put it in the same folder like i have...Cheers on getting it to work!

Re: Tower Tracker 1.0
 

I modified the code to output distance values to the network table. When I add code to put the distance value on the dashboard, no values show up. Also, when I use the OutlineViewer to check any networktable values (with the localhost as "roboRIO-3929-FRC.local"), nothing shows up except the Root folder. Did you get the network table to work?

Re: Tower Tracker 1.0
 

Before checking you need to make sure your program connects to the network tables on the robot. Here is what you can do to ensure that it will connect before it does the vision processing.