AI News, MIT Drone Flies Autonomously While Avoiding Obstacles
- On Monday, February 19, 2018
- By Read More
MIT Drone Flies Autonomously While Avoiding Obstacles
In just about every video featuring drones making aggressive maneuvers around obstacles there’s some amount of “cheating” going on.
With that goal in mind—andjust US $1700 in hardware—MIT PhD student Andrew Barryhas managed to fire a fixed-wing drone at some trees and not hit them, using only two cellphones worth of onboard computing hardware and real-time image processing.
Cameras that have the necessary frame rate and resolution to enable you to clearly see obstacles in the first place pour out ahumongousnumber of pixels, each one of which needs to be analyzed to determine whether the drone has to worry about it.
Using stereo filtering from a pair of 376-by-240-pixel resolution, 120-frames-per-second cameras spaced 34 centimetersapart, the drone focuses its attention (for robots, this equates to obstacle avoidance algorithms) on pixels that are about 10 meters away and nothing else.
It saves these pixels in memory, and the next image (taken 8.3 cm later if the drone is flying at 10 meters per second) adds more pixels beyond the previous set.
Because the detection horizon for obstacles is so short, the drone might not have enough time to take an effective evasive maneuver if (say) it approaches a building, but for trees and other relatively small and discrete obstacles, it seems like it should be able to continue avoiding things indefinitely.
As the researchers point out, the detection horizon is primarily constrained by computer processing power, so as that improves, they’ll be able to scan multiple depths to plan more complex paths around multiple obstacles at varying distances.
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