A method for modeling underwater coral canopy radiative transfer and fluorescence effects

By establishing a three-dimensional model of underwater corals and determining their optical properties, and combining BRDF and Monte Carlo integration methods, the accuracy problem of light transmission simulation in underwater coral health detection was solved, achieving high-precision coral health detection.

CN119478186BActive Publication Date: 2025-12-05GUANGXI UNIV
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Patent Information

Application Number
CN202411609553.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-12
Publication Date
2025-12-05
Estimated Expiration
2044-11-12

AI Technical Summary

Technical Problem

Existing technologies cannot accurately simulate the multiple scattering and reabsorption effects of light in underwater coral health detection, and lack adaptive capabilities, resulting in large differences in readings at different locations of corals in hyperspectral images, making it impossible to accurately analyze coral health.

Method used

A three-dimensional model of the underwater scene was established, and the optical properties of corals and substrate were determined by sensor measurement data. The light transmission process within the canopy was simulated in a forward manner, and an irradiance spatial distribution model was constructed. The coral fluorescence spectrum was simulated by reverse spectral imaging, and the model was optimized by combining the BRDF model and the Monte Carlo integral method.

Benefits of technology

It has achieved high-precision underwater coral canopy modeling, which can adapt to different scales, shapes and water conditions, and improves the accuracy and practicality of coral health detection.

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Abstract

The present application relates to the technical field of marine ecological remote sensing, and particularly relates to a modeling method for underwater coral canopy radiation transmission and fluorescence effect, comprising the following steps: establishing a three-dimensional model of an underwater scene, and constructing a three-dimensional gridding model of underwater coral targets and substrates; determining environmental parameters; forward simulating the light transmission process in the canopy, constructing an irradiance spatial distribution model of the underwater scene, and obtaining a fluorescence emission radiance distribution model; based on the fluorescence emission radiance distribution model, reversely simulating the coral fluorescence spectrum through spectral imaging; model verification and optimization, adjusting algorithm parameters, and improving the accuracy of the model. The present application provides a modeling method for underwater coral canopy radiation transmission and fluorescence effect, which can comprehensively consider different scales, coral morphologies, substrate types and water conditions by extending the BRDF model to contain a fluorescence term to simulate the propagation of fluorescent light and the special optical effects of the underwater environment, so as to realize high-precision underwater coral canopy modeling.
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