The development of technology that can recognize the outline of an object in a room only with the laser light passed through the keyhole is in progress.
A research team at Stanford University has announced 'Keyhole Imaging, ' which captures the shape of objects in a room by passing laser light through a keyhole. Experiments have confirmed that the rough outline of an object installed in a simulated room can be grasped.
Keyhole Imaging: Non-Line-of-Sight Imaging and Tracking of Moving Objects Along a Single Optical Path | IEEE Journals & Magazine | IEEE Xplore
Computational Imaging Keyhole Imaging | IEEE TCI 2021
https://www.computationalimaging.org/publications/keyhole-imaging/
A Laser Can Now Use a Keyhole to See Inside a Closed Room --Nerdist
https://nerdist.com/article/keyhole-imaging-allows-laser-to-visualize-closed-room/
A laser camera that can see an entire room through a keyhole | Boing Boing
https://boingboing.net/2021/09/09/a-laser-camera-that-can-see-an-entire-room-through-a-keyhole.html
Obviously, we can only see 'objects in our field of view', not 'objects around the corner', for example. However, when driving a car, if you can grasp the object at the corner, you can reduce the probability of an accident, so you can visually grasp the object outside the field of view, ' Non-line-of-sight (NLOS)'. , non-line-of-sight) study of technology called imaging 'has been continuing for many years.
Christopher Metzeler and his colleagues at Stanford University have newly announced NLOS imaging technology that captures the outline of objects in a room by irradiating a laser beam from a keyhole. Below is a movie that explains this technology in an easy-to-understand manner, named 'Keyhole Imaging'.
Keyhole Imaging | IEEE TCI 20201 --YouTube
When laser light is passed through the keyhole ...
A part of the laser beam is applied to the target through the reflection on the wall surface.
This time, Keyhole Imaging uses the laser light that has been reflected since it hits the target ...
The concept is to create a visual image of the room by catching it in the reverse route of irradiation.
The research team is conducting experiments to see how accurately the image of the image can be obtained at this stage.
The actual result is below. The mannequin can only get an image that shows only the rough outline, but for the K, E, and Y alphabets, it is possible to get an image that shows the outline, though it is rough. However, at this stage, the image is created from the change in the laser light that is reflected and returned, so it is necessary for the object to move.
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