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maxst | 5 years ago

So many algorithms insist on using "single RGB camera" approach, when it would be much more practical to use 2 cameras.

discuss

The power is the existing giant corpus of video. When I'm in front of a computer I'm going to run this up against the dancing of James Brown and Michael Jackson. Should be interesting.

Maybe an Olympic gymnast as well.

dTal|5 years ago

Practical for an algorithm implementer, maybe - deeply impractical for real-world use. Stereo cameras are rare and nontrivial (you have to synchronize shutters). Monocular algorithms can be applied to the millions of hours of existing footage, or used with the billions of cameras, smartphones, robots, drones, and fancy doorbells that already exist right now.

derefr|5 years ago

If you can calibrate the time-delay between the two cameras, can you not just interpolate one or the other signal backward or forward in time so that it aligns with the other? (By "interpolation", here, I mean the sort of thing the Oculus does on the display side, generating frames "between" frames, to smooth motion during head rotation. Take one real frame from one camera, and build an interpolated frame between two real frames from the other camera to match it.)

RavlaAlvar|5 years ago

For “slow” moving object like human body, does synchronised shutter matters that much and if so , is there any tricks to compensate it if synchronisation is not possible?

maxst|5 years ago

There are dozens of 360 cameras on the market, so I think shutters synchronization is not that difficult to implement.

regularfry|5 years ago

Only for near-field. Further out than roughly an arm-span, your brain itself doesn't use binocular vision for 3D estimation because there's not that much information in the parallax.

dungdang|5 years ago

do you have a source for that? because my source: one closed eye, tells me very clearly i do use binocular vision for 3d - 3d being how far something is.

you don't need 'much' information. you know the distance between the eyes, and then you have the 2 lines from each eye to the object. that's called a triangle. do you know how to calculate the height of a triangle? because that's your distance.