Abstract
Suspended particles affect the state and vitality of the marine ecosystem. In situ probing and accurately classifying the suspended particles in seawater have an important impact on ecological research and environmental monitoring. Individual measurement of the optical polarization parameters scattered by the suspended particles has been proven to be a powerful tool to classify the particulate compositions in seawater. In previous works, the temporal polarized light pulses are sampled and averaged to evaluate the polarization parameters. In this paper, a method based on dense sampling of polarized light pulses is proposed and the experimental setup is built. The experimental results show that the dense sampling method optimizes the classification and increases the average accuracy by at least 16% than the average method. We demonstrate the feasibility of dense sampling method by classifying the multiple types of particles in mixed suspensions and show its excellent generalization ability by multi-classification of the particles. Additional analysis indicates that the dense sampling method basically takes advantage of the high-quality polarization parameters to optimize the classification performance. The above results suggest that the proposed dense sampling method has the potential to probe the suspended particles in seawater in red-tide early warning, as well as sediment and microplastics monitoring.
Highlights
IntroductionThe ocean is the most important resource endowed by nature, which contains the abundant resources necessary for the survival and development of human society [1]
The ocean is the most important resource endowed by nature, which contains the abundant resources necessary for the survival and development of human society [1].While the ocean continues to create huge benefits for modern society, its own ecology has encountered great challenges to human life and production [2,3,4]
The PLP-All model is more accurate and flexible in the mixed experiment prediction. These results show that using the dense sampling of polarized light pulses is beneficial to the more accurate classification of suspended particles
Summary
The ocean is the most important resource endowed by nature, which contains the abundant resources necessary for the survival and development of human society [1]. While the ocean continues to create huge benefits for modern society, its own ecology has encountered great challenges to human life and production [2,3,4]. As an important and essential component in seawater, the suspended particles significantly influence the optical properties of seawater, as well as the marine ecological environment [5,6]. The detected particle information is helpful to interpret the data of marine science macroscopic researches, and further, promote the development of remote sensing in marine monitoring [17,18]
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