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Coral Reef Surveillance: Infrared-Sensitive Video Surveillance Technology as a New Tool for Diurnal and Nocturnal Long-Term Field Observations.

Dirnwoeber M, Machan R, Herler J - Remote Sens (Basel) (2012)

Bottom Line: Integrating this easy-to-set up and portable remote-sensing equipment into coral reef research is expected to significantly advance our understanding of fine-scaled biotic processes on coral reefs.The options and equipment choices in IR-sensitive surveillance technology are numerous and subject to a steadily increasing technical supply and quality at decreasing prices.Accompanied by short video examples, this report introduces a radio-transmission system for simultaneous recordings and real-time monitoring of multiple cameras with synchronized timestamps, and a surface-independent underwater-recording system.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Integrative Zoology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria; juergen.herler@univie.ac.at.

ABSTRACT
Direct field observations of fine-scaled biological processes and interactions of the benthic community of corals and associated reef organisms (e.g., feeding, reproduction, mutualistic or agonistic behavior, behavioral responses to changing abiotic factors) usually involve a disturbing intervention. Modern digital camcorders (without inflexible land-or ship-based cable connection) such as the GoPro camera enable undisturbed and unmanned, stationary close-up observations. Such observations, however, are also very time-limited (~3 h) and full 24 h-recordings throughout day and night, including nocturnal observations without artificial daylight illumination, are not possible. Herein we introduce the application of modern standard video surveillance technology with the main objective of providing a tool for monitoring coral reef or other sessile and mobile organisms for periods of 24 h and longer. This system includes nocturnal close-up observations with miniature infrared (IR)-sensitive cameras and separate high-power IR-LEDs. Integrating this easy-to-set up and portable remote-sensing equipment into coral reef research is expected to significantly advance our understanding of fine-scaled biotic processes on coral reefs. Rare events and long-lasting processes can easily be recorded, in situ-experiments can be monitored live on land, and nocturnal IR-observations reveal undisturbed behavior. The options and equipment choices in IR-sensitive surveillance technology are numerous and subject to a steadily increasing technical supply and quality at decreasing prices. Accompanied by short video examples, this report introduces a radio-transmission system for simultaneous recordings and real-time monitoring of multiple cameras with synchronized timestamps, and a surface-independent underwater-recording system.

No MeSH data available.


Symbolic underwater image of the video system. Tripods with a 3-way-pan-tilt head (1) and fixed diving weights (2) provide a stable and easy setup of cameras under water, while gooseneck stands (3) orientate the infrared-lights (4). To facilitate alignment of camera distances and for recordings in bird’s eye view, flat aluminum bars (approx. 50 × 1 × 0.5 cm) perforated with 1/4″ holes (5) are used as extensions between cameras (6) and tripods.
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Figure 4: Symbolic underwater image of the video system. Tripods with a 3-way-pan-tilt head (1) and fixed diving weights (2) provide a stable and easy setup of cameras under water, while gooseneck stands (3) orientate the infrared-lights (4). To facilitate alignment of camera distances and for recordings in bird’s eye view, flat aluminum bars (approx. 50 × 1 × 0.5 cm) perforated with 1/4″ holes (5) are used as extensions between cameras (6) and tripods.

Mentions: Tripods with a 3-way-pan-tilt head and fixed diving weights are used to provide a stable and easy setup of cameras under water; gooseneck stands are used to orientate the IR-lights (Figure 4).


Coral Reef Surveillance: Infrared-Sensitive Video Surveillance Technology as a New Tool for Diurnal and Nocturnal Long-Term Field Observations.

Dirnwoeber M, Machan R, Herler J - Remote Sens (Basel) (2012)

Symbolic underwater image of the video system. Tripods with a 3-way-pan-tilt head (1) and fixed diving weights (2) provide a stable and easy setup of cameras under water, while gooseneck stands (3) orientate the infrared-lights (4). To facilitate alignment of camera distances and for recordings in bird’s eye view, flat aluminum bars (approx. 50 × 1 × 0.5 cm) perforated with 1/4″ holes (5) are used as extensions between cameras (6) and tripods.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4017077&req=5

Figure 4: Symbolic underwater image of the video system. Tripods with a 3-way-pan-tilt head (1) and fixed diving weights (2) provide a stable and easy setup of cameras under water, while gooseneck stands (3) orientate the infrared-lights (4). To facilitate alignment of camera distances and for recordings in bird’s eye view, flat aluminum bars (approx. 50 × 1 × 0.5 cm) perforated with 1/4″ holes (5) are used as extensions between cameras (6) and tripods.
Mentions: Tripods with a 3-way-pan-tilt head and fixed diving weights are used to provide a stable and easy setup of cameras under water; gooseneck stands are used to orientate the IR-lights (Figure 4).

Bottom Line: Integrating this easy-to-set up and portable remote-sensing equipment into coral reef research is expected to significantly advance our understanding of fine-scaled biotic processes on coral reefs.The options and equipment choices in IR-sensitive surveillance technology are numerous and subject to a steadily increasing technical supply and quality at decreasing prices.Accompanied by short video examples, this report introduces a radio-transmission system for simultaneous recordings and real-time monitoring of multiple cameras with synchronized timestamps, and a surface-independent underwater-recording system.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Integrative Zoology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria; juergen.herler@univie.ac.at.

ABSTRACT
Direct field observations of fine-scaled biological processes and interactions of the benthic community of corals and associated reef organisms (e.g., feeding, reproduction, mutualistic or agonistic behavior, behavioral responses to changing abiotic factors) usually involve a disturbing intervention. Modern digital camcorders (without inflexible land-or ship-based cable connection) such as the GoPro camera enable undisturbed and unmanned, stationary close-up observations. Such observations, however, are also very time-limited (~3 h) and full 24 h-recordings throughout day and night, including nocturnal observations without artificial daylight illumination, are not possible. Herein we introduce the application of modern standard video surveillance technology with the main objective of providing a tool for monitoring coral reef or other sessile and mobile organisms for periods of 24 h and longer. This system includes nocturnal close-up observations with miniature infrared (IR)-sensitive cameras and separate high-power IR-LEDs. Integrating this easy-to-set up and portable remote-sensing equipment into coral reef research is expected to significantly advance our understanding of fine-scaled biotic processes on coral reefs. Rare events and long-lasting processes can easily be recorded, in situ-experiments can be monitored live on land, and nocturnal IR-observations reveal undisturbed behavior. The options and equipment choices in IR-sensitive surveillance technology are numerous and subject to a steadily increasing technical supply and quality at decreasing prices. Accompanied by short video examples, this report introduces a radio-transmission system for simultaneous recordings and real-time monitoring of multiple cameras with synchronized timestamps, and a surface-independent underwater-recording system.

No MeSH data available.