Defense/Carpet Sensor

[lethc]

So my team's looking for sensors to differentiate between the polycarb defense and the green carpet for use in autonomous. We're already in possession of some DM7-0N-1A photoelectric sensors. How well would these work for differentiating between the defenses and the carpet?

Another idea we had would be using some type of RGB sensor to pick up the green carpet only. Does anyone have a link to some kind of sensor that would work for this?

We'd likely be mounting the sensors a bit up into the robot so they can't get knocked around - this means that they'd have to have a decent range to always be picking up what's below them.

Is your team planning on using some type of sensor to differentiate between the defenses and the carpet? If so, please share

Thanks,
Becker