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Confirmed: it's feasible!

A project log for Low cost stereo camera

Building a cheap stereo camera using COTS parts

SolenoidSolenoid 03/27/2017 at 14:261 Comment

I got the second camera and two 170 degree wide angle lenses (1.8mm focal length). After calibration the disparity was terrible. I figured it was because I used the clips on the back of the cameras to hold them in place. Indeed a small movement of the lens is enough to render the calibration obsolete.

I printed a support that would hold them together at 100mm apart, the results were slightly better:

I think there is still room for improvements, but this proves the general feasibility of the idea.

Lessons learned:

Discussions

Mark Mullin wrote 06/13/2017 at 15:38 point

Have you computed intrinsics and distortion coefficients for the lenses ?  Lot easier to get higher quality parallax data if you do - and yeah, you have to work out orientation and fov overlap to determine closest measureable distance -  all you know for an element within a single cameras field of view is that it's either outside the overlap region or inside it - if outside, you got nothing - if inside, you only know it maximum possible distance - but a bit or trig will answer those questions to the degree possible

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