There are sensors designed for broadacre cropping that will pick weeds out of crop.[0]
As well as sensors that will pickup weeds from dirt.[1]
This would be in the middle of those two problems. There isn't a dense crop to pick the weeds out of, but it's probably slightly too dense to just pick them up from the dirt.
As well as sensors that will pickup weeds from dirt.[1]
This would be in the middle of those two problems. There isn't a dense crop to pick the weeds out of, but it's probably slightly too dense to just pick them up from the dirt.
[0]http://www.spaa.com.au/projects_details.php?project=16
[1]http://www.weed-it.com/