3D visual reconstructions

3D visual mapping seafloor has found applications ranging from environment monitoring to underwater archeology. However, the attenuation of light is significantly more pronounced in water than in air or in space, and so in order to obtain underwater images in color, it is necessary to be within 2~3m of the seafloor. In addition to the high risk of collision when operating underwater vehicles at such low altitudes, the limited area of the seafloor covered in each image means large area surveys require a huge investment of time.
Our group aims to increase the efficiency of mapping large areas of the seafloor by developing technology to take color images at ranges of between 8~10m so that each image can cover a larger area, and develop algorithms to automatically process the data obtained. To date, we have deployed the system to map hydrothermal vent fields, gas hydrate fields and coral reefs.

 
AE2000: A flight style 8m altitude mapping platform capable of generating wide area 3D reconstructions. An example of a small section of 3d reconstruction data. The Mounds shown are 30 m high and the artificial guide-base has an edge length of 5m.

Expeditions

2017

  • MR17-03C Holographic imaging of deep-sea zooplankton using the eHoloCam (University of Aberdeen), Chief Scientist: Dhugal Lindsay, June 2017

2016

  • YK16-15 Wide-area 3D visual mapping of manganese crusts and hydrothermal vent fields in the NW Pacific using AE2000, Chief Scientist: Blair Thornton, September 2016
  • SSK-01 Mapping of Coral Reefs off Sesoko Island, Okinawa, Chief Scientist: Yuya Nishida, July 2016

2015

  • MilMil 001 Long range mapping of the Iheya North Field using the AUV AE2000 (R/V No.3 Kaiyomaru), Chief Scientist: Tamaki Ura, October 2015
  • NT15-E03 Long range mapping of the Joetsu Methane Hydrate Field (ROV HyperDolphin and the R/V Natsushima), Chief Scientist: Ryo Matsumoto, September 2015
  • NT15-13 Long range mapping of the Iheya North Field (ROV HyperDolphin and the R/V Natsushima), Chief Scientist: Ken Takai, August 2015

2014

  • NT14-11 Leg 2 Long range mapping of seafloor debris in the Tohoku region together with the Australian Centre for Field robotics AUV mapping group (ROV HyperDolphin and the R/V Natsushima), Chief Scientist: Yasuo Furushima, July 2014
  • KY14-01 Long range mapping of the Iheya North Field together with the Australian Centre for Field robotics AUV mapping group (ROV HyperDolphin and the R/V Kaiyo), Chief Scientist: Takai Ken, January 2014

2013

  • NT13-21 Long range mapping off Fukushima and Miyagi using the ROV HyperDolphin and the R/V Natushima, Chief Scientist: Yoshihiro Fujiwara, October 2013

≤2012

  • NT12-27 Long range mapping of N. Iheya vent area using the ROV HyperDolphin and the R/V Natushima, Chief Scientist: Shinsuke Kawaguchi, October 2012
  • NT12-15 Long range mapping of a Whale fall in Sagami bay using the ROV HyperDolphin and the R/V Natushima, Chief Scientist: Yoshihiro Fujiwara, June 2012
  • NT12-07 Field test of long range seaXerocks at a Kagoshima bay vent site using the ROV HyperDolphin and the R/V Natushima, Chief Scientist: Blair Thornton, March 2012

Latest

July 24, 2015
ACFR coming to IIS