• Buelldozer@lemmy.today
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    23 hours ago

    A lot of masks only work in the visible light spectrum. It’s entirely possible to “radar” images and remove them.

      • catloaf@lemm.ee
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        17 hours ago

        No. Most cameras have filters to cut non-visible light.

        And any EM that passes through a mask is probably going to pass through flesh too. And any EM that’s transmitted and not reflected means it can’t be imaged by a sensor.

        Very thin fabric, like a thin white T-shirt, can be transparent to IR in bright sunlight. But that’s a fairly rare case.