webcam issues. camview questions

Hello,

I have some questions about webcam connection with emc2 and I appreciate if somebody could help me.
How can I import an openCV algorithm for tracking objects in camview and use it in emc2.
psha wrote (excellent work with camview) that openCV is headache and not so good for input/output. Why is that, what else can I use for tracking objects with emc2?

In the plugin "detect.hough", of camview, how can I find and use "marker.x" "marker.y" "marker.z"?
I would like to move my machine at the coordinates (marker.x , marker.y , marker.z) how can I do this?

thanks