Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine
Ocean Acoustic Waveguide Remote Sensing (OAWRS) enables fish population density distributions to be instantaneously quantified and continuously monitored over wide areas. Returns from seafloor geology can also be received as background or clutter by OAWRS when insufficient fish populations are prese...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Published: |
Multidisciplinary Digital Publishing Institute
2023
|
| Online Access: | https://hdl.handle.net/1721.1/147590 |
| _version_ | 1826213867008557056 |
|---|---|
| author | Eleftherios, Kaklamanis Ratilal, Purnima Makris, Nicholas C. |
| author2 | Massachusetts Institute of Technology. Center for Ocean Engineering |
| author_facet | Massachusetts Institute of Technology. Center for Ocean Engineering Eleftherios, Kaklamanis Ratilal, Purnima Makris, Nicholas C. |
| author_sort | Eleftherios, Kaklamanis |
| collection | MIT |
| description | Ocean Acoustic Waveguide Remote Sensing (OAWRS) enables fish population density distributions to be instantaneously quantified and continuously monitored over wide areas. Returns from seafloor geology can also be received as background or clutter by OAWRS when insufficient fish populations are present in any region. Given the large spatial regions that fish inhabit and roam over, it is important to develop automatic methods for determining whether fish are present at any pixel in an OAWRS image so that their population distributions, migrations and behaviour can be efficiently analyzed and monitored in large data sets. Here, a statistically optimal automated approach for distinguishing fish from seafloor geology in OAWRS imagery is demonstrated with Neyman–Pearson hypothesis testing which provides the highest true-positive classification rate for a given false-positive rate. Multispectral OAWRS images of large herring shoals during spawning migration to Georges Bank are analyzed. Automated Neyman-Pearson hypothesis testing is shown to accurately distinguish fish from seafloor geology through their differing spectral responses at any space and time pixel in OAWRS imagery. These spectral differences are most dramatic in the vicinity of swimbladder resonances of the fish probed by OAWRS. When such significantly different spectral dependencies exist between fish and geologic scattering, the approach presented provides an instantaneous, reliable and statistically optimal means of automatically distinguishing fish from seafloor geology at any spatial pixel in wide-area OAWRS images. Employing Kullback–Leibler divergence or the relative entropy in bits from Information Theory is shown to also enable automatic discrimination of fish from seafloor by their distinct statistical scattering properties across sensing frequency, but without the statistical optimal properties of the Neyman–Pearson approach. |
| first_indexed | 2024-09-23T15:56:05Z |
| format | Article |
| id | mit-1721.1/147590 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T15:56:05Z |
| publishDate | 2023 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | mit-1721.1/1475902024-01-08T20:42:55Z Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine Eleftherios, Kaklamanis Ratilal, Purnima Makris, Nicholas C. Massachusetts Institute of Technology. Center for Ocean Engineering Ocean Acoustic Waveguide Remote Sensing (OAWRS) enables fish population density distributions to be instantaneously quantified and continuously monitored over wide areas. Returns from seafloor geology can also be received as background or clutter by OAWRS when insufficient fish populations are present in any region. Given the large spatial regions that fish inhabit and roam over, it is important to develop automatic methods for determining whether fish are present at any pixel in an OAWRS image so that their population distributions, migrations and behaviour can be efficiently analyzed and monitored in large data sets. Here, a statistically optimal automated approach for distinguishing fish from seafloor geology in OAWRS imagery is demonstrated with Neyman–Pearson hypothesis testing which provides the highest true-positive classification rate for a given false-positive rate. Multispectral OAWRS images of large herring shoals during spawning migration to Georges Bank are analyzed. Automated Neyman-Pearson hypothesis testing is shown to accurately distinguish fish from seafloor geology through their differing spectral responses at any space and time pixel in OAWRS imagery. These spectral differences are most dramatic in the vicinity of swimbladder resonances of the fish probed by OAWRS. When such significantly different spectral dependencies exist between fish and geologic scattering, the approach presented provides an instantaneous, reliable and statistically optimal means of automatically distinguishing fish from seafloor geology at any spatial pixel in wide-area OAWRS images. Employing Kullback–Leibler divergence or the relative entropy in bits from Information Theory is shown to also enable automatic discrimination of fish from seafloor by their distinct statistical scattering properties across sensing frequency, but without the statistical optimal properties of the Neyman–Pearson approach. 2023-01-20T15:27:11Z 2023-01-20T15:27:11Z 2023-01-11 2023-01-20T14:22:53Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/147590 Remote Sensing 15 (2): 437 (2023) PUBLISHER_CC http://dx.doi.org/10.3390/rs15020437 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/pdf Multidisciplinary Digital Publishing Institute Multidisciplinary Digital Publishing Institute |
| spellingShingle | Eleftherios, Kaklamanis Ratilal, Purnima Makris, Nicholas C. Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine |
| title | Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine |
| title_full | Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine |
| title_fullStr | Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine |
| title_full_unstemmed | Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine |
| title_short | Optimal Automatic Wide-Area Discrimination of Fish Shoals from Seafloor Geology with Multi-Spectral Ocean Acoustic Waveguide Remote Sensing in the Gulf of Maine |
| title_sort | optimal automatic wide area discrimination of fish shoals from seafloor geology with multi spectral ocean acoustic waveguide remote sensing in the gulf of maine |
| url | https://hdl.handle.net/1721.1/147590 |
| work_keys_str_mv | AT eleftherioskaklamanis optimalautomaticwideareadiscriminationoffishshoalsfromseafloorgeologywithmultispectraloceanacousticwaveguideremotesensinginthegulfofmaine AT ratilalpurnima optimalautomaticwideareadiscriminationoffishshoalsfromseafloorgeologywithmultispectraloceanacousticwaveguideremotesensinginthegulfofmaine AT makrisnicholasc optimalautomaticwideareadiscriminationoffishshoalsfromseafloorgeologywithmultispectraloceanacousticwaveguideremotesensinginthegulfofmaine |