A coustics, laser-scan and optical systems are the primary underwater imaging sensors utilized onboard unmanned submersible platforms- either remotely operated vehicles (ROVs) or autonomous underwater vehicles (AUVs)-for offshore exploration, surveying and sampling. The primary trade-off factors among these imaging technologies comprise range, spatial resolution, area coverage and data rate. Low-frequency acoustic imaging sensors, mainly side-scan and forward sector-scan systems, have been widely used in studying the characteristics of the seafloor and benthic communities over extended areas as large as several kilometers at relatively low resolutions and sample rates. Increased resolution is attained by operating in the higher 0.2-2 MHz frequencies, but target range drops by orders of magnitude to only tens to hundreds of meters. Very fine-scale details at millimeter(s) resolution can be recorded by the deployment of laser scanning and optical systems within no more than a few to tens of meters in clear waters.
|Number of pages||5|
|State||Published - Aug 1 2002|
ASJC Scopus subject areas
- Ocean Engineering