Volume XLII-2
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2, 885–892, 2018
https://doi.org/10.5194/isprs-archives-XLII-2-885-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2, 885–892, 2018
https://doi.org/10.5194/isprs-archives-XLII-2-885-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  30 May 2018

30 May 2018

DIVERS-OPERATED UNDERWATER PHOTOGRAMMETRY: APPLICATIONS IN THE STUDY OF ANTARCTIC BENTHOS

P. Piazza1,2, V. Cummings3, D. Lohrer4, S. Marini5, P. Marriott3, F. Menna6, E. Nocerino7,8, A. Peirano9, and S. Schiaparelli1,10 P. Piazza et al.
  • 1MNA, Italian National Antarctic Museum, Section of Genoa, University of Genoa, Genoa, Italy
  • 2DSFTA, Department of Physical Sciences, Earth and Environment, University of Siena, Siena, Italy
  • 3NIWA, National Institute of Water & Atmospheric Research, Wellington, New Zealand
  • 4National Institute of Water & Atmospheric Research, Hamilton, New Zealand
  • 5CNR/ISMAR-SP, Research National Council, Institute of Marine Science U.O.S. La Spezia, Lerici (La Spezia), Italy
  • 63D Optical Metrology (3DOM) unit, Bruno Kessler Foundation (FBK), Trento, Italy
  • 7LSIS, I&M Team, Aix-Marseille Universite, Polytech Luminy, Marseille, France
  • 8Theoretical Physics, ETH Zurich, Zurich, Switzerland
  • 9ENEA, Marine Environment Research Center, Lerici (La Spezia), Italy
  • 10DISTAV, Department of Earth, Environmental and Life Sciences, University of Genoa, Genoa, Italy

Keywords: Benthos, 3D models, video samplings, diver-operated underwater photogrammetry, Antarctica, historical videos, 3D features detecting

Abstract. Ecological studies about marine benthic communities received a major leap from the application of a variety of non-destructive sampling and mapping techniques based on underwater image and video recording. The well-established scientific diving practice consists in the acquisition of single path or ‘round-trip’ over elongated transects, with the imaging device oriented in a nadir looking direction. As it may be expected, the application of automatic image processing procedures to data not specifically acquired for 3D modelling can be risky, especially if proper tools for assessing the quality of the produced results are not employed. This paper, born from an international cooperation, focuses on this topic, which is of great interest for ecological and monitoring benthic studies in Antarctica. Several video footages recorded from different scientific teams in different years are processed with an automatic photogrammetric procedure and salient statistical features are reported to critically analyse the derived results. As expected, the inclusion of oblique images from additional lateral strips may improve the expected accuracy in the object space, without altering too much the current video recording practices.