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Several years ago I had an idea for a camera made from harmonically oscillating pixels that shift frequency based on intensity. It would have many of the advant

Several years ago I had an idea for a camera made from harmonically oscillating pixels that shift frequency based on intensity. It would have many of the advantages of event cameras, but with extremely accurate absolute brightness measurent as well. Does anyone know if this exists?

robbyt 7y ago
Only in your imagination, it seems
- h0h0h0h0111 7y ago
  OT: but does anyone else see OP's post as posted 1min after his responder's?
  - kakali 7y ago
    Yes
    - pontifier 7y ago
      Something weird with timestamps is going on. If I look at my comment stream the correct time is listed. I posted my comment yesterday.
      - TheSpiceIsLife 7y ago
        dang, is this something you need to be aware of?
        dang 7y ago
        It's an artifact of the submission re-upping system as described here: https://news.ycombinator.com/item?id=19774614 https://news.ycombinator.com/item?id=19774614
        TheSpiceIsLife 7y ago
        Righteo, thanks for clearing that up.
thatcherc 7y ago
Sounds like MKIDs - microwave kinetic inductance detectors. They're arrays of little LC oscillators where the inductance changes when a photon hits. They can actually resolve frequency and time of arrival of a photon, which is super useful, especially for photon-limited astrometry. [0] [1] [0] - https://wikipedia.org/wiki/Kinetic_inductance_detector https://wikipedia.org/wiki/Kinetic_inductance_detector [1] - https://web.physics.ucsb.edu/~bmazin/mkids.html https://web.physics.ucsb.edu/~bmazin/mkids.html
- no_identd 7y ago
  https://en.wikipedia.org/wiki/Kinetic_inductance_detector https://en.wikipedia.org/wiki/Kinetic_inductance_detector FTFY
jcims 7y ago
You would still need to digitize the signal coming from the pixels, and the bandwidth required for each pixel would be commensurate to the rate at which you wish to capture tge information.
- amerine 7y ago
  That seems like a lot of pixel busses.
  - jcims 7y ago
    Actually the one nice thing about this architecture is that if each pixel had its own oscillator you could dump them all on to the same bus until you reach the bandwidth of your ADC.
pizza 7y ago
This isn't really the same thing (and I think compressed sensing might be the direction of research to check out further) but you might find it interesting - check out the modulo camera; https://web.media.mit.edu/~hangzhao/modulo.html https://web.media.mit.edu/~hangzhao/modulo.html > A modulo camera could theoretically take unbounded radiance levels by keeping only the least significant bits. We show that with limited bit depth, very high radiance levels can be recovered from a single modulus image with our newly proposed unwrapping algorithm for natural images.

robbyt 7y ago

Only in your imagination, it seems

h0h0h0h0111 7y ago
OT: but does anyone else see OP's post as posted 1min after his responder's?
- kakali 7y ago
  Yes
  - pontifier 7y ago
    Something weird with timestamps is going on. If I look at my comment stream the correct time is listed. I posted my comment yesterday.
    - TheSpiceIsLife 7y ago
      dang, is this something you need to be aware of?
      - dang 7y ago
        It's an artifact of the submission re-upping system as described here: https://news.ycombinator.com/item?id=19774614 https://news.ycombinator.com/item?id=19774614
        TheSpiceIsLife 7y ago
        Righteo, thanks for clearing that up.

thatcherc 7y ago

Sounds like MKIDs - microwave kinetic inductance detectors. They're arrays of little LC oscillators where the inductance changes when a photon hits. They can actually resolve frequency and time of arrival of a photon, which is super useful, especially for photon-limited astrometry. [0] [1] [0] - https://wikipedia.org/wiki/Kinetic_inductance_detector https://wikipedia.org/wiki/Kinetic_inductance_detector [1] - https://web.physics.ucsb.edu/~bmazin/mkids.html https://web.physics.ucsb.edu/~bmazin/mkids.html

no_identd 7y ago
https://en.wikipedia.org/wiki/Kinetic_inductance_detector https://en.wikipedia.org/wiki/Kinetic_inductance_detector FTFY

jcims 7y ago

You would still need to digitize the signal coming from the pixels, and the bandwidth required for each pixel would be commensurate to the rate at which you wish to capture tge information.

amerine 7y ago
That seems like a lot of pixel busses.
- jcims 7y ago
  Actually the one nice thing about this architecture is that if each pixel had its own oscillator you could dump them all on to the same bus until you reach the bandwidth of your ADC.

pizza 7y ago

This isn't really the same thing (and I think compressed sensing might be the direction of research to check out further) but you might find it interesting - check out the modulo camera; https://web.media.mit.edu/~hangzhao/modulo.html https://web.media.mit.edu/~hangzhao/modulo.html > A modulo camera could theoretically take unbounded radiance levels by keeping only the least significant bits. We show that with limited bit depth, very high radiance levels can be recovered from a single modulus image with our newly proposed unwrapping algorithm for natural images.