The Technology
The present invention relates to systems and methods for photographing an in a scattering medium such as water, fog or biological tissues. A wide range of imaging domains exists in scattering media. Several studies improved visibility in such media under natural illumination. However, natural light is in general unavailable in relevant scenarios, as in deep water, pipelines, night and biological tissues. Moreover, natural illumination may change in time unpredictably. The need to use artificial illumination is therefore obvious. This involves a practical difficulty: the illumination is strongly scattered back towards the camera from particles along the line of sight, creating backscatter that overwhelms the signal and causing severe loss of visibility. This problem can be alleviated by increasing the baseline between the light source and the camera, however this is impossible to do in tight environments such as shipwrecks or pipelines.
The technology invention looks at widefield illumination with a small (or no) baseline, where the backscatter is modulated by polarization.
Advantages
- Improved 3D image taken under turbid medium conditions
Applications and Opportunities
- Underwater photography for various applications: marine biology, marine archeology, underwater mapping, underwater robots, power line testing, underwater communications and piping, underwater structures inspection, vessel inspection, search and rescue, fishing, military uses, marine mining, search and mining Underwater minerals, testing nuclear reactors
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