Usb camera

[josephno1]

Here is a grip file to help you get started.
It does a half decent job of detecting targets. You might want to play around with contour areas and rgb stuff.

I also uploaded some sample picture that you might want to play around with it.
Use network tables to use it in the java code

[ARaine]

I found that using the vision to directly control a motor was too slow. By using a gyro, I calculated (roughly) the angle needed to rotate so that the center of the target was on the center of the camera's vision.

The calculation was:

arctan([Distance of center target to center vision] / [Constant])

The constant is just a value that I found through experimentation (around 300, may be different for you). This method only works if you have a gyroscope because I then took that calculated angle and plugged it into a PID loop to rotate the robot based on a gyro reading.

I had some success with this in autonomous by performing this operation twice.