This is a machine that can “thin” a field of lettuce in the time it takes about 20 workers to do the job by hand. The thinner is part of a new generation of machines that target the last frontier of agricultural mechanization – fruits and vegetables destined for the fresh market, not processing, which have thus far resisted mechanization because they’re sensitive to bruising. Researchers are now designing robots for these most delicate crops by integrating advanced sensors, powerful computing, electronics, computer vision, robotic hardware and algorithms, as well as networking and high precision GPS localization technologies.