Patent · US Active

Automatic spatial calibration of camera network

US9928594B2 · kind B2 · utility

2Cited by

1References

24Claims

0Family size

Assignee

AGT INTERNATIONAL GMBH · CH

Inventors

Henning Hamer · Munich, DE
Arsenii Sawchuk · Wiesbaden, DE
Markus SCHLATTMANN · Griesheim, DE
Roel Heremans · Darmstadt, DE

Key dates

Filing date	Jul 7, 2015
Grant date	Mar 27, 2018
Priority date	—
Expiry date	Sep 8, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG06T2210/61
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for automatic spatial calibration of a network of cameras along a road includes, processing a frame that is obtained from each camera of the network to automatically identify an image of a pattern of road markings that have a known spatial relationship to one another. The identified images are used to calculate a position of each camera relative to the pattern of road markings that is imaged by that camera. Geographical information is applied to calculate an absolute position of a field of view of each camera. A global optimization is applied to adjust the absolute position of the field of view of each camera of the camera network relative to an absolute position of the fields of view of other cameras of the camera network.

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