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- W2997409885 abstract "The main objective of this study is to demonstrate the possibility of underwater three-dimensional measurement (underwater SfM) in a coral reef area by structure from motion (SfM). The possibility of underwater SfM using a small submarine (small remotely operated vehicle, sROV) was also investigated. After we conducted underwater SfM and conventional measurements simultaneously for dendritic coral, massive coral, and seaweed Enhalus acoroides in a coral reef area in Amitori Bay of Iriomote Island, we compared and examined the results. Underwater SfM allowed us to measure the heights, major and minor axes, and branch thicknesses of dendritic coral with the accuracy of a maximum and minimum error of 4.5 cm and 0.1 cm, respectively. Consequently, it was verified to be useful for monitoring coral preservation. However, three-dimensional measurements of Enhalus acoroides by SfM were not satisfactory because of swaying of leaves by waves or currents during the taking of sequential photographs. Investigation by sROV provided a clear three-dimensional model, but some technological problems were also revealed." @default.
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- W2997409885 date "2019-12-01" @default.
- W2997409885 modified "2023-09-27" @default.
- W2997409885 title "Underwater Three-Dimensional Measurements" @default.
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- W2997409885 doi "https://doi.org/10.1007/978-981-15-1129-5_8" @default.
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