Patent · US Active

Method and system for measuring an object by means of stereoscopy

US11640673B2 · kind B2 · utility

1Cited by

5References

13Claims

0Family size

Assignee

ISRA VISION GMBH · DE

Inventors

Holger Wirth · Langen, DE
Peter Neugebauer · Barmstedt, DE
Manuel Scholz · Darmstadt, DE
Enis Ersü · Darmstadt, DE

Key dates

Filing date	Apr 12, 2019
Grant date	May 2, 2023
Priority date	—
Expiry date	Apr 12, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/10021
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The invention relates to a method and a system for measuring an object (2) by means of stereoscopy, in which method a pattern (3) is projected onto the object surface by means of a projector (9) and the pattern (3), which is designated as a scene and is projected onto the object surface, is captured by at least two cameras (4.1, 4.2, 4.3, 4.4), wherein correspondences of the scene are found in the images captured by the cameras (4.1, 4.2, 4.3, 4.4) by means of a computing unit (5) using image processing, and the object (2) is measured by means of the correspondences found. According to the invention, the cameras (4.1, 4.2, 4.3, 4.4) are intrinsically and extrinsically calibrated, and a two-dimensional and temporal coding is generated during the pattern projection, by (a) projecting a (completely) two-dimensionally coded pattern (3) and capturing the scene using the cameras (4.1, 4.2, 4.3, 4.4), and (b) projecting a temporally encoded pattern having a two-dimensionally different coding several times in succession and using the cameras (4.1, 4.2, 4.3, 4.4) to capture several scenes in succession, the capturing of said scenes being triggered simultaneously in each case.

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