Vision Tracking Help

[mjgard]

I think I understand this in words, but putting it into labview is the difficulty. I think you are saying if the camera is mounted center on the turret then your target might have an coordinate of (0, 5) and as you move the coordinate would change but we want the program and the turret to do everything in its power to keep the X-Coordinate at 0. The Y may change as you get closer or move further away, but the program is trying to keep the X the same to keep it centered on the turret.

Now making that a reality is where I am going to struggle.

[plnyyanks]

Try something similar to this.

You'll want to use the X coordinate from the camera as the process variable to a PID controller (since this will change with the rotation of the turret). Your setpoint should be the center of the image (where you want the target to appear). This can be found by dividing the X resolution of the image by two. Note that this also assumes that the camera is mounted exactly on the center of the shooter - you might have to tweak the setpoint to make it mesh with your system. You'll need to tune the PID constants in my snippet - since they're the default values. There are other threads around for help on PID gain tuning (just search for them).

[Greg McKaskle]

If you are using the Target location from the LV example, it is a -1 to 1 coordinate with 0 in the center, not 80. If you are using a more raw version, width/2 would be the right target for the PID.

Greg McKaskle

[yelk11]

how do you add another camera that is not an axis camera. mine is a trendnet tv-IP110/A