First test of our 3-D video system

In late August of 2014 my dad, a recently retired Wisconsin DNR fish biologist, flew up to Alaska to help with a week or so of intense fieldwork. We relied on volunteers this summer because we didn’t have enough fieldwork to justify hiring a technician, but it was very valuable to have him up here and be working with the same person for several days in a row.

On August 21st, we tested our main underwater video system in a relatively deep pool in Panguingue Creek.



The system consists of a side-by-side pair of Nikon DSLRs in underwater housings, with HDMI connections wired to Atomos viewer/recorders, so we can see what the cameras are seeing at all times and make sure they’re placed correctly.


We need a better holder for these

We use 2 cameras instead of 1 because the side-by-side views allow us to use 3-D video measurement methods with the VidSync software and capture the exact 3-D coordinates of every action of the fish we want to measure. To enable those measurements, we also film a calibration grid, pictured below.

2014-08-21-0047_We didn’t get any good fish footage out of this trip, but that’s to be expected from the first test of complicated new equipment. We did learn a great deal about the quirks and limitations of our technology, and developed a good understanding of what I would need to buy, tweak, calibrate, or hack to make everything work smoothly when we begin real data collection next summer.



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