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•2 min read•from Marine Science

Measuring sharks in water?

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Measuring the length and volume of sharks in their natural habitat presents unique challenges, particularly when using underwater photogrammetry or stereo-video techniques. As an in-house researcher conducting shark snorkeling tours, you are currently utilizing dual GoPro Hero 3 cameras calibrated with checkerboards. While familiar with photogrammetry, you seek more effective software solutions to streamline your process. Both SteroMorph and XMA Lab have posed difficulties, and traditional drone methods are impractical in this context.

I'm looking for advice from anyone familiar with experience in underwater photogrammetry or stereo-video for marine animals.

I'm trying to figure out the best way to collect length and volume measurements of sharks from within the water. I collect data during shark snorkeling tours (in-house researcher). Right now, I am using dual-set up GoPro Hero 3s with cameras calibrated via checkerboard. I'm familiar with photogrammetry but wouldn't call myself an expert.

I've dabbled in both the R package SteroMorph and the program XMA lab. SteroMorph has had trouble calibrating, and XMA is better but pretty clunky. I'd love to find something more streamlined.

In the past, I've used Agisoft and Drone Deploy but only with drone data. Drones won't work great with these sharks, because I couldn't reliably get a coplanar image from above, and my boss wouldn't love me flying a drone around our guests.

Any ideas? I'm looking for a better software that would work specifically with my GoPro setup, or a novel methodology altogether (that I could use with constantly moving sharks in close range and guests swimming around, hahah).

submitted by /u/Rockylynne
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