Seeing the invisible: Tiny crystal films could make night vision an everyday reality
Jun 2021, phys.org
"ultra-thin layers of nanocrystals to make infrared light visible"
via The Australian National Univ: Rocio Camacho-Morales et al, Infrared upconversion imaging in nonlinear metasurfaces, Advanced Photonics (2021). DOI: 10.1117/1.AP.3.3.036002
Non-line-of-sight imaging with picosecond temporal resolution
Aug 2021, phys.org
Described this a few years ago, trying to be hyperimaginative; it's already happening.
It's called non-line-of-sight (NLOS) imaging, and in this particular version, which should scare the living shit out of you, it can record time-of-flight information of single photons. In other words, it can see outside it's own field of vision, in real time, to see things around the corner, and outside the room. Like if you were to crop part of the picture out, for example, or to cover part of the camera lens, this would be able to guess what's there because the photons from "over there" are shooting across the room, passing the field of vision of the camera lens. And because we can now see those shooting photons, we can trace back where they came from, and reconstruct three-dimensional images of all kinds of things that we aren't even looking at.
via Chinese Academy of Sciences: Bin Wang et al, Non-Line-of-Sight Imaging with Picosecond Temporal Resolution, Physical Review Letters (2021). DOI: 10.1103/PhysRevLett.127.053602
Smartphone camera can illuminate bacteria causing acne, dental plaques
Jun 2021, phys.org
To identify potentially harmful bacteria on skin and in oral cavities:
Wang's team augmented the smartphone camera's capabilities by attaching a small 3D-printed ring containing 10 LED black lights around a smartphone case's camera opening. The researchers used the LED-augmented smartphone to take images of the oral cavity and skin on the face of two research subjects."The LED lights 'excite' a class of bacteria-derived molecules called porphyrins, causing them to emit a red fluorescent signal that the smartphone camera can then pick up," said lead author Qinghua He, a UW doctoral student in bioengineering.
I am learning today that "oral cavity" is another word for mouth.
via University of Washington: Qinghua He et al, Smartphone-enabled snapshot multispectral autofluorescence imaging and its application for bacteria assessments in skin and oral cavity, Optics and Lasers in Engineering (2021). DOI: 10.1016/j.optlaseng.2021.106546
Real-time video of scenes hidden around corners is now possible
Nov 2021, phys.org
The video of the stuffed animal was created by capturing light reflected off a wall to the toy and bounced back again in a science-fiction-turned-reality technique known as non-line-of-sight imaging.
Do you really need to know how it works? We can see around corners; we can see the photons from things that are not in the picture, but they're bouncing off surfaces that are in the picture, and we collect all those photons, and recreate the image with them.
This type of thing is called "hidden-scene imaging".
via University of Wisconsin-Madison with funding from DARPA and NSF: Ji Hyun Nam et al, Low-latency time-of-flight non-line-of-sight imaging at 5 frames per second, Nature Communications (2021). DOI: 10.1038/s41467-021-26721-x
Haptic feedback sleeve and goggles allow blind people to 'see' with their arm
Feb 2022, phys.org
Synesthesia by design
via Center for Digital Technology and Management, Technical University of Munich: Manuel Zahn, Armaghan Ahmad Khan, Obstacle avoidance for blind people using a 3D camera and a haptic feedback sleeve. arXiv:2201.04453v1 [cs.HC], arxiv.org/abs/2201.04453
The benefits of peripheral vision for machines
Mar 2022, phys.org
Kind of like "Junk DNA"?
The results suggest that designing a machine-learning model to include some form of peripheral processing could enable the model to automatically learn visual representations that are robust to some subtle manipulations in image data.
via MIT Center for Brains, Minds, and Machines: Anne Harrington, Arturo Deza, Finding biological plausibility for adversarially robust features via metameric tasks. 2022.
Researchers shrink camera to the size of a salt grain
Dec 2021, phys.org
"nano-antenna metasurface configurations"
via Princeton University: Ethan Tseng et al, Neural nano-optics for high-quality thin lens imaging, Nature Communications (2021). DOI: 10.1038/s41467-021-26443-0
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