A Methodology for Consistent Georegistration in Underwater Hyperspectral Imaging
This article proposes a novel methodology for precise georegistration in underwater hyperspectral imaging (UHI) using a red-green-blue (RGB) camera to build a photogrammetry model that estimates the pose and a 3-D seabed model. The two main scientific contributions are: 1) the development of two met...
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| Veröffentlicht in: | IEEE journal of oceanic engineering 2022-04, Vol.47 (2), p.331-349 |
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| creator | Lovas, Havard Snefjella Mogstad, Aksel Alstad Sorensen, Asgeir J. Johnsen, Geir |
| description | This article proposes a novel methodology for precise georegistration in underwater hyperspectral imaging (UHI) using a red-green-blue (RGB) camera to build a photogrammetry model that estimates the pose and a 3-D seabed model. The two main scientific contributions are: 1) the development of two methods for geometric calibration of the hyperspectral imager (HSI) with the RGB camera and 2) the development of a methodology for consistent georegistration of the pushbroom hyperspectral imagery on the seabed using the photogrammetry model and the geometrically calibrated HSI. The georegistration uses a calibrated RGB camera, fixed to the HSI, with an overlapping field of view. The RGB images are used to build a photogrammetry model. Through utilizing the geometric HSI parameters from the calibration, the hyperspectral imagery is ray cast onto the 3-D model. This methodology is exemplified for UHI from a remotely operated vehicle on a cold-water coral reef in the Trondheim Fjord, Norway. The precision is unprecedented for georegistration in UHI, demonstrated by the first-ever spatially consistent UHI mosaic to contain multiple transects. |
| doi_str_mv | 10.1109/JOE.2021.3108229 |
| format | Article |
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The two main scientific contributions are: 1) the development of two methods for geometric calibration of the hyperspectral imager (HSI) with the RGB camera and 2) the development of a methodology for consistent georegistration of the pushbroom hyperspectral imagery on the seabed using the photogrammetry model and the geometrically calibrated HSI. The georegistration uses a calibrated RGB camera, fixed to the HSI, with an overlapping field of view. The RGB images are used to build a photogrammetry model. Through utilizing the geometric HSI parameters from the calibration, the hyperspectral imagery is ray cast onto the 3-D model. This methodology is exemplified for UHI from a remotely operated vehicle on a cold-water coral reef in the Trondheim Fjord, Norway. 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| subjects | Calibration Cameras Color imagery Coral reefs Distortion Field of view Fjords Hyperspectral imaging Imagery Imaging techniques Laboratories Mapping and monitoring Mathematical models Methodology Ocean floor Photogrammetry Position measurement Remotely operated vehicles Solid modeling Three dimensional models Underwater underwater hyperspectral imaging (UHI) Water temperature |
| title | A Methodology for Consistent Georegistration in Underwater Hyperspectral Imaging |
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