The Short Answer
There are two main kinds of detection. Green-on-brown finds green weeds against bare soil, before the crop emerges or in fallow ground, and can rely on colour alone. Green-on-green finds weeds growing among the crop itself, which takes trained AI models to tell one plant from another.
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Fast cameras Global shutter cameras capture sharp images at working speed.
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Edge AI processing A computer on the machine classifies plants in milliseconds.
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Reliable networking A switch carries every camera stream to the computer without drops.
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Rugged build Everything must survive dust, spray, wash-down and vibration.
Why It Matters
Our spot spraying case study describes an autonomous platform that does this at 15 mph, with GigE cameras, a sealed M12 switch and a rugged Jetson AGX Orin computer. Our GigE Vision camera FAQ explains the cameras.