Patent · US Active

Method and device for determining a visual range in daytime fog

US9506859B2 · kind B2 · utility

0Cited by

0References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Ulrich Stopper · Gerlingen, DE
Stephan Lenor · Stuttgart, DE
Stefan Weber · Nesselnbach, CH

Key dates

Filing date	Feb 24, 2014
Grant date	Nov 29, 2016
Priority date	—
Expiry date	Feb 24, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01N2201/126
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method is provided for determining a visual range in daytime fog, the method (800) including a step of reading in and a step of ascertaining. In the step of reading in, coordinates of at least one characteristic point of a brightness curve of a camera image of the fog are read in. The brightness curve represents brightness values of image points of the camera image along a reference axis of the camera image. In the step of ascertaining, a meteorological visual range in the camera image is ascertained using the coordinates, a meteorological contrast threshold, and a processing specification, in order to estimate the visual range in fog. The processing specification images location-dependent and/or direction-dependent scattered light through the fog in the camera image.

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