计算机与现代化 ›› 2025, Vol. 0 ›› Issue (02): 77-85.doi: 10.3969/j.issn.1006-2475.2025.02.011

• 图像处理 • 上一篇    下一篇

道路场景下基于地平线检测的相机自标定优化


  

  1. (1.陕西高速电子工程有限公司,陕西 西安 710061;2.长安大学信息工程学院,陕西 西安 710018)
  • 出版日期:2025-02-28 发布日期:2025-02-28
  • 基金资助:
    陕西省自然科学基础研究计划项目(2023-JC-YB-600); 2023年陕西省交通运输厅科研计划项目(23-108k); 中央高校研究生教育教学研究校级项目(300103131033); 长安大学教育教学改革研究重点项目(BZ202326)

Optimization for Camera Self-calibration Based on Horizon Detection in Road Scenes

  1. (1. Shaanxi High Speed Electronic Engineering Co., Ltd., Xi’an 710061, China;
    2. College of Information Engineering, Chang’an University, Xi’an 710018, China)
  • Online:2025-02-28 Published:2025-02-28

摘要: 当前交通场景下的相机标定,主要是基于道路场景的关键信息,并依赖道路虚线、平行线等冗余信息对相机标定参数进行优化。但是由于场景信息有限,消失点范围无法固定,同时由于相机自旋角的存在,使得相机标定结果存在一定的误差。本文从地平线检测入手,提出一种基于深度学习关键点检测的地平线检测算法,并将精度提升至82.46%;随后,在地平线检测基础上矫正相机自旋角,并利用地平线提供更严格的约束,从而实现相机自标定的参数优化。实验结果表明,在矫正相机自旋角及利用地平线提供更强的约束后,相机自标定参数获得了更快的收敛速度及最低1.79%的误差。

关键词: 单目相机, 相机标定, 深度学习, 地平线检测, 相机自旋角

Abstract: The current camera calibration in traffic scenes relies mainly on the key information of the road scene and relies on redundant information such as road dashed lines, parallel lines, etc. to optimize the camera calibration parameters. However, due to the limited information of the scene, the range of vanishing points cannot be fixed, and at the same time, due to the existence of the camera spin angle, the results of the camera calibration have a certain degree of error. Starting from the horizon detection, a deep learning key point detection-based horizon detection algorithm improves the accuracy to 82.46%. Subsequently, the camera self-calibration parameters are optimized by correcting the camera spin angle based on horizon detection and providing stricter constraints by using the horizon. The experimental results show that after correcting the camera spin angle and providing stronger constraints by using the horizon, the camera self-calibration parameters obtain faster convergence and a minimum of 1.79% error.

Key words:  , monocular camera; camera calibration; deep learning; horizon line detection; camera spin angle

中图分类号: