US 2026/0228917 A1Published application

Method for calibrating an image acquisition device

AssigneeAUMOVIO Autonomous Mobility Germany GmbH

InventorsBilal HIJAZI, Branham MOUATA, Simon DEMMER

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Abstract

A method for calibrating an image acquisition device, including determining the distance between the image acquisition device and a reference plane. The method including: acquiring at least two images of a calibration pattern located, for each image, at different distances from the image acquisition device and a constant distance from the reference plane, and having a plurality of characteristic points, preferably aligned, at different distances from the reference plane; and for each characteristic point, determining the difference between the positions of the same characteristic point from one image to another; and selecting certain characteristic points according to a predetermined condition; and estimating the distance from the acquisition device to the reference plane on the basis of the respective differences at the selected characteristic points.

Claims8

Dependent claims

A method for calibrating an image acquisition device, comprising determining the distance between the image acquisition device and a reference plane, the method comprising:

acquiring, by the image acquisition device, at least two images of a calibration pattern comprising a plurality of characteristic points, the calibration pattern being positioned such that:
during the acquisition of each image, a plurality of characteristic points have different distances from the reference plane, and
the calibration pattern is positioned at a constant distance from the reference plane and at two different distances from the image acquisition device respectively during the acquisition of the two images,
for a plurality of characteristic points of the pattern, determining a difference (e) between the positions of the same characteristic point on the two images, and
selecting the characteristic points of the pattern of which the difference (e) between the positions on the two images satisfies a predetermined condition, and
from the distances from the reference plane of the selected characteristic points and the differences (e) between the positions of these points on the two images, determining the distance (hc) of the image acquisition device from the reference plane.

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Dependencies are inferred from the claim text.