Citation:

PANGAEA.957274

Name: Analysis-ready optical underwater images collected along OFOS profile SO268/1_21-1 during SONNE cruise SO268/1, Clarion-Clipperton Zone (Pacific Ocean)
Published: 2023-04-05
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Clarion Clipperton Fracture Zone; OFOS; optical camera; seafloor images; Underwater images

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

This dataset comprises a sequence of analysis-ready seafloor optical images of the Clarion-Clipperton Zone (CCZ) in the Pacific Ocean. These images have been pre-processed and are directly usable by the marine imaging community. The raw images were acquired along 12 OFOS (camera) deployment tracks, during SONNE expeditions SO268/1 and SO268/2 to the Mn-nodule covered deep seabed areas of the CCZ in the Pacific Ocean; the raw images have been published here https://doi.org/10.1594/PANGAEA.935856. We subjected these raw images through a series of transformations aimed at correcting for the degradation in visual quality that is typical of underwater images of the deep sea. In particular, the transformations we applied to the raw images include: correction for illumination drop-off radially from the image center towards the edges; contrast enhancements though contrast limited adaptive histogram equalization; color normalization to correct for uneven scene brightness among individual images; and finally, standardization of the varying spatial footprint size due to the inability of the imaging platform (OFOS) to maintain a consistent altitude above the seafloor. Therefore, the provided images are ready to be used in seafloor substrate classification studies.

Keyword(s):

Clarion Clipperton Fracture Zone; OFOS; optical camera; seafloor images; Underwater images

Source:

Purser, Autun; Bodur, Yasemin V; Ramalo, Sofia; Stratmann, Tanja; Schoening, Timm (2021): Seafloor images of undisturbed and disturbed polymetallic nodule province seafloor collected along OFOS profile SO268/1_21-1 RV SONNE SO268/1 cruise. PANGAEA, https://doi.org/10.1594/PANGAEA.935896

Project(s):

JPI Oceans - Ecological Aspects of Deep-Sea Mining (JPIO-MiningImpact)

Funding:

Helmholtz Association of German Research Centres (HGF), grant/award no. HIDSS-0005 : Helmholtz School for Marine Data Science (MarData)

Coverage:

Median Latitude: 11.924678 * Median Longitude: -117.011565 * South-bound Latitude: 11.914060 * West-bound Longitude: -117.037023 * North-bound Latitude: 11.929987 * East-bound Longitude: -116.996528

Date/Time Start: 2019-03-04T09:35:10 * Date/Time End: 2019-03-04T19:39:26

Minimum Elevation: -4093.9 m * Maximum Elevation: -4093.9 m

Event(s):

SO268/1_21-1 (OFOS-02) * Latitude: 11.929500 * Longitude: -117.040817 * Date/Time: 2019-03-04T08:30:24 * Elevation: -4093.9 m * Location: Clarion-Clipperton Fraction Zone, North East Pacific Ocean * Campaign: * Basis: * Method/Device: Ocean Floor Observation System (OFOS) * Comment: GER Trial; Position USBL; Start Transect

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Image number/name	Image no/name		Mbani, Benson
2	DATE/TIME	Date/Time		Mbani, Benson	Geocode
3	LATITUDE	Latitude		Mbani, Benson	Geocode
4	LONGITUDE	Longitude		Mbani, Benson	Geocode
5	Depth, bathymetric	Bathy depth	m	Mbani, Benson
6	Area/locality	Area		Mbani, Benson	license area
7	Classification	Classification		Mbani, Benson	seafloor
8	Score	Score		Mbani, Benson	classification
9	Scale	Scale	arbitrary units	Mbani, Benson	[centimeters per pixel]
10	Image	IMAGE		Mbani, Benson
11	Image (File Size)	IMAGE (Size)	Bytes	Mbani, Benson

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

26033 data points

Download Data

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML (shows only first 2000 rows)