Patent · US Active

Imaging systems and methods for recovering object visibility

US8836810B2 · kind B2 · utility

3Cited by

11References

12Claims

0Family size

Assignee

Technion Research & Development Foundation Limited · IL

Inventors

Yoav Schechner · Kiryat Bialik, IL
Tali Treibitz · Beer Yaakov, IL

Key dates

Filing date	Dec 4, 2012
Grant date	Sep 16, 2014
Priority date	—
Expiry date	Dec 4, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/30232
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A system and method are provided for imaging in scattering media such as fog, water and biological tissues. Normally, such images suffer from poor visibility due to backscattering and signal attenuation. At least two images are taken of the scene using active widefield polarized illumination, with different states of a camera-mounted polarizer. The degree of polarization of backscatter is estimated in every point of the scene, leading to an estimation of the backscatter in every point of the scene. A portion or all of the value of backscatter can be deducted in each point of the scene resulting in an enhanced image with improved contrast and brightness range across the field of view.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.