DeepSurveyCam--A Deep Ocean Optical Mapping System.
Tom Kwasnitschka1, Kevin Köser2, Jan Sticklus3
1GEOMAR Helmholtz Centre for Ocean Research Kiel, RD4/RD2, Wischhofstr. 1-3, 24148 Kiel, Germany. tkwasnitschka@geomar.de.
Sensors (Basel, Switzerland)
|February 2, 2016
Summary
This study introduces an autonomous underwater vehicle (AUV)-based optical system for deep-sea visual mapping. The new system addresses challenges like high pressure and poor visibility, enabling detailed seafloor surveys.
Area of Science:
- Marine robotics
- Oceanographic technology
- Geospatial surveying
Background:
- Deep-sea visual surveys face significant challenges including extreme pressure, accessibility issues, and limitations in localization and imaging technologies.
- Existing methods for underwater photogrammetry are less developed than terrestrial or space-based counterparts, hindering comprehensive seafloor mapping.
- Factors like absence of natural light, refraction, attenuation, and scattering severely impact optical system performance in deep-sea environments.
Purpose of the Study:
- To present an advanced AUV-based optical system for autonomous visual mapping of extensive deep-seafloor areas.
- To overcome the limitations of current deep-sea survey technologies, particularly in terms of operational depth and mapped area.
- To compare the performance and trade-offs of the new system against existing deep-sea mapping solutions.
Main Methods:
- Development and deployment of a robust AUV-equipped optical system designed for autonomous operation.
- System designed to function in water depths up to 6000 meters, addressing challenges of pressure and localization.
- Incorporation of advanced imaging techniques to mitigate effects of refraction, attenuation, and scattering for improved radiometric quality.
Main Results:
- Successful mapping of 90,000 square meters of deep ocean floor during a recent deployment.
- Demonstration of the system's capability for autonomous visual mapping over large seafloor areas (square kilometers).
- Analysis of trade-offs, including resolution versus mapped area, highlighting system's efficiency.
Conclusions:
- The developed AUV-based optical system represents a significant advancement for deep-sea visual mapping.
- The system effectively addresses key challenges in deep-sea exploration, enabling more efficient and extensive seafloor surveys.
- This technology holds promise for future oceanographic research and resource management through improved seafloor characterization.
Related Concept Videos
01:18Deep Sea Microbial Ecology
33
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches...
33
01:29Topographic Surveying and Contours
1.4K
Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
1.4K
01:18Imaging Biological Samples with Optical Microscopy
12.2K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
12.2K
01:30Types of Global Positioning System Surveys
427
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
427
01:15Depth Perception and Spatial Vision
2.6K
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
2.6K
01:27Uniform Depth Channel Flow
733
Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...
733