Here's the commercial version.[1] This machine is sorting peas by color. Peas. Individual peas. Each individual pea is examined by cameras for size, color, and looking like a pea. Rejects are kicked into the reject hopper by an air jet. There are machines like this for most fruit. Typical throughput is a ton per hour. Most fruit and berries go through such machines today. That's why the fruit at the supermarket is so consistent.
The process looks like magic. Color-mixed items go in, and single-color items come out, on a line going so fast that no human can see what's happening. It's amazing to see computer vision systems that fast.
These machines work by putting the items on a conveyor belt, then dropping them on a much faster conveyor to spread them out. The fast conveyor goes past cameras, and at the end, launches the items into free flight for a few inches. While in flight, computer-controlled air jets knock out the rejects.