Greinert, Jens; Schoening, Timm; Köser, Kevin; Rothenbeck, Marcel (2017): Seafloor images and raw context data along AUV track SO239_65-1_AUV6 (Abyss_172) during SONNE cruise SO239 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.882056, In supplement to: Schoening, Timm; Köser, Kevin; Greinert, Jens (2018): An acquisition, curation and management workflow for sustainable, terabyte-scale marine image analysis. Scientific Data, 5, 180181, https://doi.org/10.1038/sdata.2018.181
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Abstract:
The raw images (available on request) have been captured using a Canon 8-15mm fisheye lens and therefore they have a wide field of view, which results in a dark image boundary as the lights did not illuminate the outer sectors well. The images in this dataset have then been undistorted to virtual images that an ideal perspective camera with only 90 degrees horizontal field of view would have seen from the same position. To achieve this, the color of each pixel in the ideal image is obtained by
- computing the ray in space associated with this virtual pixel (using rectilinear un-projection)
- projecting this ray into the original fisheye image (using equidistant projection), yielding a sub-pixel position
- interpolating the colors of the neighboring pixels
Technically, the undistortion has been performed using the tool https://svn.geomar.de/dsm-general/trunk/src/BIAS/Tools/biasproject.cpp (at revision 418, and earlier, compatible revisions).
Manual image annotation is available here: https://annotate.geomar.de/volumes/247
Related to:
Martínez Arbizu, Pedro; Haeckel, Matthias (2015): RV SONNE Fahrtbericht / Cruise Report SO239: EcoResponse assessing the ecology, connectivity and resilience of polymetallic nodule field systems, Balboa (Panama) - Manzanillo (Mexico) 11.03.-30.04.2015. GEOMAR Report (N. Ser.), 25, 204 pp, https://doi.org/10.3289/GEOMAR_REP_NS_25_2015
Other version:
Project(s):
JPI Oceans - Ecological Aspects of Deep-Sea Mining (JPIO-MiningImpact)
Coverage:
Median Latitude: 11.824951 * Median Longitude: -117.514034 * South-bound Latitude: 11.807145 * West-bound Longitude: -117.537926 * North-bound Latitude: 11.830322 * East-bound Longitude: -117.509274
Date/Time Start: 2015-03-30T06:53:01 * Date/Time End: 2015-03-30T19:59:55
Minimum DEPTH, water: 4041.8 m * Maximum DEPTH, water: 4356.4 m
Event(s):
SO239_65-1 (SO239_65-1_AUV6) * Latitude Start: 11.810170 * Longitude Start: -117.542170 * Latitude End: 11.834830 * Longitude End: -117.517500 * Date/Time Start: 2015-03-30T05:00:00 * Date/Time End: 2015-03-31T01:00:00 * Elevation Start: -4335.7 m * Elevation End: -4344.8 m * Location: German reference area (German RA) * Campaign: SO239 * Basis: Sonne_2 * Method/Device: Autonomous underwater vehicle (AUV) * Comment: Recovery: SO239_70-1
Comment:
Target Altitude of AUV above seafloor: 7.5m
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Rothenbeck, Marcel | Geocode | ||
| 2 | LATITUDE | Latitude | Rothenbeck, Marcel | Geocode | ||
| 3 | LONGITUDE | Longitude | Rothenbeck, Marcel | Geocode | ||
| 4 | DEPTH, water | Depth water | m | Rothenbeck, Marcel | Geocode | |
| 5 | Distance | Distance | m | Rothenbeck, Marcel | AUV to seafloor | |
| 6 | Time, relative | Time rel | ms | Schoening, Timm | ||
| 7 | Image brightness | Img brightness | relative units | Schoening, Timm | ||
| 8 | Ground visibility (1=yes/0=no) | Ground vis | # | Schoening, Timm | seafloor | |
| 9 | File name | File name | Schoening, Timm | |||
| 10 | File format | File format | Schoening, Timm | |||
| 11 | File size | File size | kByte | Schoening, Timm | ||
| 12 | Uniform resource locator/link to image | URL image | Schoening, Timm | Digital camera, Canon EOS 6D, Fisheye lens | 0.5 image / second | |
| 13 | Chlorophyll a | Chl a | µg/l | Rothenbeck, Marcel | Fluorometer, WET Labs, ECO FLNTU | |
| 14 | Turbidity (Nephelometric turbidity unit) | Turbidity | NTU | Rothenbeck, Marcel | Fluorometer, WET Labs, ECO FLNTU | |
| 15 | Heading | Head | deg | Rothenbeck, Marcel | Acoustic Doppler Current Profiling (ADCP) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
258264 data points
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