Method and apparatus for determining an absolute pose of a camera located on an aerial or space vehicle

CN121532800BActive Publication Date: 2026-07-10AIRBUS DEFENCE AND SPACE(FR) +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AIRBUS DEFENCE AND SPACE(FR)
Filing Date
2024-05-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In visual navigation systems, existing technologies struggle to accurately determine the position of a vehicle relative to the scene under complex observation conditions and seasonal changes, resulting in significant position determination errors.

Method used

A monocular passive camera is used to capture image sequences of the scene. The absolute pose of the camera is determined by matching and aligning the local 3D model with the reference 3D model. Multi-view 3D reconstruction and bundle adjustment techniques are used to improve accuracy.

Benefits of technology

It achieves accurate positioning of the camera's absolute pose under complex observation conditions and seasonal changes, is suitable for real-time navigation, is applicable to any type of camera, and improves the accuracy and robustness of the navigation system.

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Abstract

The present disclosure relates to a method (20) for determining an absolute pose of a camera (11) in a reference coordinate system, the camera (11) being located on a vehicle (10) able to move relative to a scene, the method comprising: - acquiring (S20) a sequence of images of the scene, the images being respectively captured at different time instants, the sequence being considered as a video stream, - determining (S21) from the sequence of images a local 3D model in a camera coordinate system, the local 3D model representing a part of the scene at the time instant of capture of an image of the sequence called target image, - determining (S22) an absolute pose of the camera at the time instant of capture of the target image by re-aligning the position and the pose of the local 3D model in the camera coordinate system with a predetermined reference 3D model, the reference 3D model corresponding to the scene represented in three dimensions in the reference coordinate system.
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