Camera calibration method and device and storage medium

By projecting fisheye images to panoramic views, correcting for gravity, and aligning contour points with room vectors, the method enhances the accuracy of camera calibration and ground contour estimation in 3D fusion with BIM.

CN119205937AActive Publication Date: 2024-12-27KE COM (BEIJING) TECHNOLOGY CO LTD
View PDF 7 Cites 0 Cited by

Patent Information

Application Number
CN202411708236.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2024-12-27
Estimated Expiration
2044-11-26

AI Technical Summary

Technical Problem

Existing technologies face challenges in accurately calibrating fisheye cameras to fuse their images with 3D building information models (BIM) due to the need for precise external parameters, leading to inaccuracies in ground contour estimation and camera alignment.

Method used

A method involving projecting fisheye images to panoramic views, performing gravity correction, determining contour points, clustering these points in three-dimensional space, and aligning them with room type vectors to accurately calculate camera external parameters.

Benefits of technology

This approach ensures that all three-dimensional points on the ground are on a unified plane, reducing contour point calculation errors and improving the accuracy of ground contour determination and camera calibration.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119205937A_ABST
    Figure CN119205937A_ABST
Patent Text Reader

Abstract

The invention relates to a camera calibration method and device and a storage medium, a fisheye image of a room is projected to a panorama view angle, the panorama obtained through projection is subjected to gravity correction, a target panorama is obtained, it can be ensured that three-dimensional points on the ground are all on a unified plane, and the calibration accuracy of a camera is improved based on the target panorama. According to the method, the contour points of the ground included in the target panorama are determined, the contour points are projected into the three-dimensional space, the projection points of the contour points are clustered in the three-dimensional space, and the contour of the ground is determined based on the clustering result, so that the influence of contour point calculation errors on ground contour estimation can be reduced, and the accuracy of ground contour determination is improved. And furthermore, the determined contour of the ground and the house type vector of the room are aligned, so that the accuracy of an alignment result can be improved, and the accuracy of camera calibration is improved.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • 3D panorama display method and system of shooting image through fish eye lens

    CN105957048A

  • Image generation method, device and system

    CN110189247A

  • Camera calibration method and device and roadside equipment

    CN114283201A

  • Image acquisition equipment attitude calibration method and device, equipment and storage medium

    CN115423879A

  • House plan generation method and device for terminal equipment, equipment and medium

    CN115439576A