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Proceedings Paper

Subsurface classification of objects under turbid waters by means of regularization techniques applied to real hyperspectral data
Author(s): Emmanuel Carpena; Luis O. Jiménez; Emmanuel Arzuaga; Sujeily Fonseca; Ernesto Reyes; Juan Figueroa
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Paper Abstract

Improved benthic habitat mapping is needed to monitor coral reefs around the world and to assist coastal zones management programs. A fundamental challenge to remotely sensed mapping of coastal shallow waters is due to the significant disparity in the optical properties of the water column caused by the interaction between the coast and the sea. The objects to be classified have weak signals that interact with turbid waters that include sediments. In real scenarios, the absorption and backscattering coefficients are unknown with different sources of variability (river discharges and coastal interactions). Under normal circumstances, another unknown variable is the depth of shallow waters. This paper presents the development of algorithms for retrieving information and its application to the classification and mapping of objects under coastal shallow waters with different unknown concentrations of sediments. A mathematical model that simplifies the radiative transfer equation was used to quantify the interaction between the object of interest, the medium and the sensor. The retrieval of information requires the development of mathematical models and processing tools in the area of inversion, image reconstruction and classification of hyperspectral data. The algorithms developed were applied to one set of real hyperspectral imagery taken in a tank filled with water and TiO2 that emulates turbid coastal shallow waters. Tikhonov method of regularization was used in the inversion process to estimate the bottom albedo of the water tank using a priori information in the form of stored spectral signatures, previously measured, of objects of interest.

Paper Details

Date Published: 5 May 2017
PDF: 16 pages
Proc. SPIE 10198, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIII, 1019818 (5 May 2017); doi: 10.1117/12.2262760
Show Author Affiliations
Emmanuel Carpena, Univ. de Puerto Rico Mayagüez (United States)
Luis O. Jiménez, Univ. de Puerto Rico Mayagüez (United States)
Emmanuel Arzuaga, Univ. de Puerto Rico Mayagüez (United States)
Sujeily Fonseca, Univ. de Puerto Rico Mayagüez (United States)
Ernesto Reyes, Univ. de Puerto Rico Mayagüez (United States)
Juan Figueroa, Univ. de Puerto Rico Mayagüez (United States)

Published in SPIE Proceedings Vol. 10198:
Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIII
Miguel Velez-Reyes; David W. Messinger, Editor(s)

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