Analysis-ready optical underwater images collected along OFOS profile SO268/2_177-1 during SONNE cruise SO268/2, Clarion-Clipperton Zone (Pacific Ocean)


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 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.

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Metadata Access
Creator Mbani, Benson ORCID logo; Greinert, Jens ORCID logo
Publisher PANGAEA
Publication Year 2023
Funding Reference Helmholtz Association of German Research Centres Crossref Funder ID HIDSS-0005 Helmholtz School for Marine Data Science (MarData)
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 23898 data points
Discipline Earth System Research
Spatial Coverage (-117.060W, 11.842S, -117.027E, 11.859N); Clarion-Clipperton Fraction Zone, North East Pacific Ocean
Temporal Coverage Begin 2019-05-10T00:34:18Z
Temporal Coverage End 2019-05-10T09:53:13Z