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Journal:Remote Sensing

Key Words:marine observation; underwater hyperspectral imaging; liquid lens; focusing transfer; spectral and radiometric calibration

Abstract:The underwater hyperspectral imager enables the detection and identification of targets on the seafloor by collecting high-resolution spectral images. The distance between the hyperspectral imager and the targets cannot be consistent in real operation by factors such as motion and fluctuating terrain, resulting in unfocused images and negative effects on the identification. In this paper, we developed a novel integrated underwater hyperspectral imaging system for deep sea surveys and proposed an autofocus strategy based on liquid lens focusing transfer. The calibration tests provided a clear focus result for hyperspectral transects and a global spectral resolution of less than 7 nm in spectral range from 400 to 800 nm. The prototype was used to obtain spectrum and image information of manganese nodules and four other rocks in a laboratory environment. The classification of the five kinds of minerals was successfully realized by using a support vector machine. We tested the UHI prototype in the deep sea and observed a Psychropotidae specimen on the sediment from the in situ hyperspectral images. The results show that the prototype developed here can accurately and stably obtain hyperspectral data and has potential applications for in situ deep-sea exploration.

All the Authors:李德威,刘兆军

First Author:刘博涵

Indexed by:Journal paper

Correspondence Author:门少杰

Discipline:Engineering

Document Type:J

Volume:15

Issue:3

Page Number:544

ISSN No.:2072-4292

Translation or Not:no

Date of Publication:2023-01-01

Included Journals:SCI