Patent · US Active

Method for identifying soiling on a transparent screen

US8274562B2 · kind B2 · utility

6Cited by

7References

20Claims

0Family size

Assignee

ADC Automotive Distance Control Systems GmbH · DE

Inventors

Michael Walter · Kornwestheim, DE
Matthias Zobel · Günzburg, DE

Key dates

Filing date	Feb 21, 2006
Grant date	Sep 25, 2012
Priority date	—
Expiry date	Aug 26, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/8887
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A camera for identifying soiling on a protective screen, such as a vehicle windscreen, is focused on a scene through the protective screen and can be used to identify soiling and for other applications, e.g. to identify driving lanes and/or objects in the scene. Soiling is identified merely by evaluating successively recorded image frames, and artificial reference frames or reference objects are not required. A prerequisite is that the relative speed vrel between the camera and at least one recorded object in the scene is not equal to zero and its trajectory in the image is predicted. By comparing the relevant image frame sections, possible soiling on subregions of the protective screen is identified.

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