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Sep 24, 2012, 12:10 AM
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3d camera system

It's an electronic abomination, but stereo vision works. 5Mhz through a ribbon cable, heavy dependance on realtime network performance, hackneyed SPI protocol, pausing the camera clock for synchronization were cost saving measures better done without.

So the clock trimming register was not accurate enough to synchronize the cameras, but it turned out there was a blanking interval at 1/2 the frame height, where the camera clock could be paused without affecting exposure. The slight pause reduced the framerate to 67fps but nailed the synchronization.

More 3D Magic (3 min 33 sec)

Put together some 3D video to show what it can do.

It takes extremely precise alignment for 3D to work. Lens spacing has to be optimum for the distances. The lenses have to be angled towards the neutral depth plane. Those consumer cameras with fixed lenses are worthless & no-one is going to spend the time tweeking all the required parameters.

During this process, noticed the TCM8230 still generates ITU 601 luminance & Goo Tube still expands ITU 601 luminance. Most every other modern camera generates 0-255 luminance, so all your still photos & phone videos are getting clipped on Goo Tube.

The camera system remains wireless, hence the glitching.

In video mode, it maxes out at 18fps 320x240. In object tracking mode, it does 67fps 320x240. Using it for making videos is an utter waste of time, compared to buying 2 Chinese HD cams.

It wasn't the 1st 3D experiment on the blog. 3D experiments usually last a few posts before the motion sickness ends them.

Surprising to find Jim Cameraman was the 1st to use a beam splitter mirror to make a 3D camera system. That allowed greater flexibility in the intraocular distance & convergence than was possible before. Now, every professional 3D camera system uses a beam splitter.
Last edited by Jack Crossfire; Sep 24, 2012 at 02:28 AM.
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