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Advances in Earth Science >

2022 , Vol. 37 >Issue 8: 863 - 870

DOI: https://doi.org/10.11867/j.issn.1001-8166.2022.046

Remote Measurement and Error Analysis of Deep-sea Benthic Megafauna Using Paired-Laser Photogrammetry

  • Weibo WANG ,
  • Xuebao HE ,
  • Chunsheng JING ,
  • Hui LIN
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  • 1.Ocean Dynamic Laboratory, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
    2.Fujian Provincial Key Laboratory of Marine Physical and Geological Processes, Xiamen 361005, China
    3.Laboratory of Maine Biodiversity Research, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
    4.Laboratory of Marine Ecological Environment Early Warning and Monitoring, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
WANG Weibo (1986-), male, Shucheng County, Anhui Province, Associate professor. Research areas include remote sensing and physical oceanography. E-mail: wangwb@tio.org.cn

Received date: 2022-03-08

  Revised date: 2022-06-04

  Online published: 2022-09-13

Supported by

the Scientific Research Foundation of the Third Institute of Oceanography, MNR, China(2016023);The Global Change and Air-sea Interaction II(GASI-01-NPAC-STsum)

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Abstract

Image sampling of megafauna using a towed camera is immensely beneficial in deep-sea biological investigations because of the benefits of a wide investigation range, long duration, and no risk of specimen destruction. However, its automatic identification and error analysis are still understudied. A deep-sea megafauna body size measurement method was developed using towed camera observation photographs from the COMRA 50th cruise. We successfully obtained body size information of 12 sea cucumbers in the Pacific Ocean and observed a green giant sea cucumber 70.8 cm long. We examined the towed-camera system, installation, and observation errors, which imply that nonparallel lasers cause the most significant errors. A technique for correcting the inaccuracy caused by the swing of the towed camera was developed. Based on the above results, it is beneficial to logically develop the technical requirements for the examination of deep-sea megafauna with a towed camera and to encourage extensive investigation of deep-sea benthic megafauna.

Key words： Deep-sea benthic megafauna; Paired-laser measurement; Error analysis

Cite this article

Weibo WANG , Xuebao HE , Chunsheng JING , Hui LIN . Remote Measurement and Error Analysis of Deep-sea Benthic Megafauna Using Paired-Laser Photogrammetry[J]. Advances in Earth Science, 2022 , 37(8) : 863 -870 . DOI: 10.11867/j.issn.1001-8166.2022.046

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