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Spatial Mapper underwater?

This isnt a completely stupid question! and someone might be able to give me an answer?

Hypothetically were I to mount a hololens to a diver/ vessel hull or ROV in an encased bubble, with a lighting rig... would there be any limitation to the spatial mapping technology? or could it potentially be used for creating a 3D wireframe model of subsea structures? even in waters somewhat occluded by sedimentation?

ive looked at the specs and it seems like a reasonable use for hololens... but I haven't seen anybody else look into this use

Answers

  • As far as I know the HoloLens depth sensor works with infrared and that doesn't work well under water. I don't know the frequency of the sensor. If it is very high maybe you get some (very) short range results, but I don't think so. The spatial mapping distance over water is just about 3,10 meters.

    Hopefully someone else has a more scientific/better explanation than me.

  • When I think more about it I don't belive it will work at all. There might be to much particles and other distorbing things under water.

  • No worries! thanks for the answer! I did think it was a bit of a long shot... I was assuming the spatial mapping was based on an adapted form of photogrammetry which would work fine at close range to negate the effects of suspended sediment, but if it was in conjunction with other positioning sensors, then you're right if it uses some kind of light ranging sensor too, it would only work with blue-green.

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