DJI's Phantom 4 drone avoids obstacles, tracks humans

The latest drone in DJI's popular Phantom series can track humans and dodge obstacles. The enhancements make the Phantom 4 one of the most advanced consumer drones on the market, and further lower the barrier to flight for most consumers. But the technology comes with a sizable price tag.
The new obstacle avoidance system uses two forward-facing optical sensors to keep track of what's ahead of the drone. If it senses a possible collision, the drone will attempt to fly around the object while ma