Marine Biogeochemistry

Automated high-resolution imaging system for non-invasive in situ measurements of marine particles and zooplankton (KielVision)

The KielVision is a newly developed underwater imaging system for non-invasive measurements of particle - size spectra, - distribution and - recognition. Measurements rely on volume-based digital silhouette photography (Picheral et al., 2010) capturing ~ 1 liter of sea water while profiling through the water column. Automated picture analysis quantifies and qualifies captured particles and provides high resolution depth profiles (at the cm scale) of identified and un-identified object concentrations. Objects in the size range of ~30 µm to theoretically the dimensions of the field of view (~ 25 x 20 x 2 cm) can be captured. The system in its current configuration can be deployed to 30 m depth, can capture and store up to 15 fps á 12 Megapixel, be used in time or depth trigger modes (fps or fpcm), be used independent of ambient light intensities (photographs at 625 nm wavelength, provided by an LED light unit) and be used handheld due to its minimized weight.

The camera was developed in cooperation with a local industrial partner (Develogic GmbH, Hamburg) and the group of Prof. R. Koch (Multimedia Information Processing) and funded through the Leibniz prize money from Prof. Riebesell and the Kiel University Excellence Cluster.

Picheral, M., Guidi, L., Stemmann, L., Karl, D. M., Iddaoud, G., & Gorsky, G. (2010). The Underwater Vision Profiler 5: An advanced instrument for high spatial resolution studies of particle size spectra and zooplankton. Limnology and Oceanography: Methods, 8(1), 462–473. doi:10.4319/lom.2010.8.462

Contact: Dr. Jan Taucher


Sketch of the camera
Deployment in a mesocosm