Abstract
Advances in underwater imaging technologies and techniques have focused on improving the ability to identify and detect dangerous items such as explosive ordnance devices on ocean floors. These devices have the ability to cause damage to both seafaring vessels as well as humans. Therefore, they are the focus of ongoing efforts by both governments and private enterprises. However, the presence of natural and other non-lethal man-made objects in the vicinity of explosive ordnance devices have increased the use of advanced underwater imaging techniques. The U.S. Navy has started equipping underwater unmanned vehicles with the capability of identifying and extracting or neutralizing these devices.
Researchers at FAU have developed a compact device that is able to perform active imaging of underwater objects. The whole system can fit into a soda can-sized container, which allows it to easily mount on different types of undersea vehicles. Additionally, this invention overcomes contrast loss and blurring and exponential attenuation of light. The invention can also be used in assisting divers during deep diving exercises, inspections of the underside of sea vessels, and underwater robotic operations.
The methodology used in this invention consists of generating a sequence of coded illumination patterns coupled with a continuous wave laser to light up the target. A high dynamic range commercially-available camera records the sequence of images of the spatially, light modulated target. This technique helps to reduce backscattering effects on the images while allowing for enhanced image filtering during the recovery process. Included in the post-processing steps is the application of a total variation noise reduction filter. This helps to achieve the highest degree of image contrast enhancement while simultaneously capturing details of low reflectance objects of interest. The greatest benefit gained by this invention is its ability to provide advanced underwater imaging and processing capability in a very compact form-factor.
FAU is seeking partners to advance this technology into the marketplace through licensing or development partnerships.
Benefit
Safe identification and detection of explosive ordinance devicesProvides advanced underwater imaging and processing in a compact form-factorProof-of-concept demonstratedMarket Application
Optics