Grandparents living alone
Grandparents live alone, and the family wants to know right away if they fall, but nobody wants a camera in the bathroom. Radar sees movement without filming anyone's face.
AT HOME
Detecting falls
A wall-mounted radar device tracks the posture of people in the room. When someone who was standing suddenly ends up lying on the floor and doesn't get up, it alerts the family, even in the dark or in steam.
HOW IT WORKS
Counting breaths without touch
Radar can even count breaths, because the chest rising and falling by a few millimeters is enough to clearly change a 5 mm wave bouncing back. The channel simulated one minute of noisy signal, and the device still counted exactly 15 breaths.
IN HOSPITAL
Cameras that assist endoscopy
In hospitals, since 2021 the US has approved AI cameras that assist with colonoscopies, drawing a green box around possible polyps. The final decision still belongs to the doctor.
SUMMARY
Four questions to pick an eye
The series ends with four questions. Need to read color and text? Choose a camera. Need speed in rain and darkness? Choose radar. Need a very precise distance? Choose LiDAR. Could a mistake hurt someone? Combine two or more kinds.
PRIVACY
See just enough
One more principle, see just enough: in private spaces, prefer radar and process the data on the device itself.
This article is based on the video Radar that detects a fall without a camera from the Mark học AI channel. Watch the video (in Vietnamese) to see the animations.
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