Live data from Hacker News

The Daredevil Camera

ribbonfarm.com

71–80 of 158 posts

Re: The Daredevil Camera

#71
post #66
post #43

Earlier quoted context omitted.

Unfortunately once you touch this sort of high, the normal day job starts to looking boring.

But you inch closer towards a reality where there are alternatives to the boring normal day job

Sadly, such things don't pay the bills.

(Unless i missed some sort of karma/like/wow monetization :) )

Re: The Daredevil Camera

#72

Yay, a sound-field camera! I've been wondering if such things are made. Should I take the existence of this project as an indication that they aren't? The use case I imagine is finding what part of a machine is emitting a noise, much like how you would use a thermal camera for finding what part of it is running hot.

No, not common, but as the OP noted the evolution of MEMs based microphones might make them a lot more common. As the author notes, they are more like holographic cameras than what many people think of as "regular" cameras. By converting the imaging into the FFT domain the resolution gets better "everywhere" the more sensors you add. (If you have ever cut up a hologram into smaller and smaller pieces you can see this in action, as the full image is still there, just lower resolution). It would also be interesting to illuminate a non-active source with sound beam. By using two, slightly out of phase, ultrasonic sources he might be able to reveal depth detail of the surface being imaged.

Re: The Daredevil Camera

#73
post #50
post #42

Awesome project! Nitpick; Duga 3 was never built. The one near Chernobyl is Duga 1.

Facepalm. Yep, somehow it got stuck in my memory as Duga-3. Something about the third prototype/iteration of the project? No idea by now...

Only recently found out it isn't Duga 3 (as I also always thought it was), must be that wikipedia redirect.

But I didn't mean to detract, that's really a very cool project that you did!

Re: The Daredevil Camera

#74
post #43

Earlier quoted context omitted.

Right on. Reminds me of Richard Feynman or Steve Wozniak, the way they just casually talk about taking things apart and putting things together while following a curiosity on an adventure. This is representative of the sort of ethos that drew everyone here in the first place, I think.

Unfortunately once you touch this sort of high, the normal day job starts to looking boring.

So the goal now becomes to figure out how to minimize amount of time spent on the normal day job...

Re: The Daredevil Camera

#76
post #22

"Daredevil" as in vision through sound. Very neat project! I wonder how much people can see in the dark through listening to sound sources by moving their heads for motion parallax.

> I wonder how much people can see in the dark through listening to sound sources by moving their heads for motion parallax.

Listen to this with headphones: https://www.youtube.com/watch?v=IUDTlvagjJA

It’s amazing how much you can geolocate just in even a recording.

Re: The Daredevil Camera

#77

Yay, a sound-field camera! I've been wondering if such things are made. Should I take the existence of this project as an indication that they aren't? The use case I imagine is finding what part of a machine is emitting a noise, much like how you would use a thermal camera for finding what part of it is running hot.

Visisonics had a device that did something like that.

Re: The Daredevil Camera

#79
post #18

Yay, a sound-field camera! I've been wondering if such things are made. Should I take the existence of this project as an indication that they aren't? The use case I imagine is finding what part of a machine is emitting a noise, much like how you would use a thermal camera for finding what part of it is running hot.

Not exactly unheard of, but quite rare. I found a company that made large arrays like that, but they seem to operate in near field, measuring only the sound volume. Imagine a wall of microphones next to a truck - you can tell which part of the wheel makes the sound. That sort of stuff. As for an actual "camera" that turns sound into an image - i've never heard of one.

> As for an actual "camera" that turns sound into an image - i've never heard of one.

I have. His name is Daniel Kish [1, 2].

Apparently his visual cortex has learned to process sound rather then light, so he literally sees, based on the sounds he is hearing.

[1] http://www.abc.net.au/catalyst/stories/4441831.htm

[2] https://en.wikipedia.org/wiki/Daniel_Kish

Re: The Daredevil Camera

#80
post #43

Earlier quoted context omitted.

Unfortunately once you touch this sort of high, the normal day job starts to looking boring.

So the goal now becomes to figure out how to minimize amount of time spent on the normal day job...

If only they had a device that could alert them to their bosses footsteps before they could see the
Post reply on HN