Some takeaways: "Our method consumes five orders of magnitude less power than previously reported underwater wireless imaging systems" This is accomplished by

Some takeaways: "Our method consumes five orders of magnitude less power than previously reported underwater wireless imaging systems" This is accomplished by harvesting energy from acoustics over time and then triggering a circuit to operate for a brief period before recharging. The method uses "acoustic backscatter" as a means of telemetry for sending the images The imaging is done with a HM01B0 from Himax Corporation. They capture 3 monochromatic images using red, green, and blue LEDs. Looking at the produced image given by example, I am not sure how accurate the coloring is, but the shape of the object is well defined on a centimeter scale. Distance between object and camera is under 3.5 meters. The distance they send the image also appears to be about 3.5 - 4 meters. They mention a feasibility to send images over 40 meters with additional tooling. Device operates around 3.2 volts (triggered by a "super-capacitor" setup) until it depletes to 1.4 volts. Memory capacity is 12 kbs, and data transfer rate is capped at 1kbps due to the medium. They send one color at a time using 77-bit packets.