APP下载

基于智能视觉的无人机导航技术研究

2018-08-21张谦邬依林

现代电子技术 2018年16期
关键词:无人机特征提取

张谦 邬依林

摘 要: 基于鲁棒滤波的无人机着陆相对导航方法是通过设计的鲁棒高阶容积滤波相对导航滤波器实现无人机着陆导航,缺乏无人机导航图像预处理过程,导航准确性差。为此,提出基于智能视觉的无人机着陆导航方法,采用基于视觉的无人机导航特征提取方法,通过高、低帽滤波器增强无人机视频跑道图像,使用Ostu分割法对增强无人机视频跑道图像做二值化处理和去噪预处理,通过Hough变换提取预处理后无人机跑道图像中跑道的直线特征。依据获取的直线特征,进行无人机姿态角和位置运算以及换算后,获取无人机的姿态角和位置,实现无人机着陆的自主导航。实验证明,所提方法能够有效地对无人机着陆进行导航,并且准确性和效率较高。

关键词: 智能视觉; 无人机; 着陆导航; 图像预处理; 特征提取; 姿态角

中图分类号: TN965?34; TP391 文献标识码: A 文章编号: 1004?373X(2018)16?0132?03

Abstract: The unmanned aerial vehicle (UAV) landing relative navigation method based on robust filtering achieves UAV landing navigation by means of the designed robust high?order volume?filtering relative navigation filter, resulting in lack of the preprocessing process of UAV navigation images, and poor navigation accuracy. Therefore, a UAV landing navigation method based on intelligent vision is proposed. The vision?based UAV navigation feature extraction method is adopted. The high and low hat filters are used to enhance UAV video runway images. The Ostu segmentation method is used to perform binarization processing and denoising preprocessing for enhanced UAV video runway images. The Hough transform is used to extract the linear feature of runways in preprocessed UAV runway images. According to the obtained linear feature, the attitude angle and position of the UAV are obtained after calculation and conversion of the attitude angle and position of the UAV, so as to realize autonomous navigation of UAV landing. The experimental results show that the proposed method can effectively navigate UAV landing, and has high accuracy and efficiency.

Keywords: intelligent vision; UAV; landing navigation; image preprocessing; feature extraction; attitude angle

無人机具有体积小、灵活性高、耗费低等特点,当下,已经较为广泛地运用于监控、通信、拍摄等诸多领域[1]。研究无人机在监控中的着陆过程,对于确保无人机回收质量和安全性,具有重要的价值。以往研究出的无人机着陆导航方法由于导航精度差、效率低等缺点已经逐渐被淘汰。随着智能视觉技术的极速发展,利用智能视觉信息实现无人机着陆导航的方法得到研究人员越来越多的关注[2]。传统基于鲁棒滤波的无人机着陆相对导航方法,通过设计的鲁棒高阶容积滤波相对导航滤波器实现对无人机着陆的准确导航,缺乏无人机导航图像预处理过程,导航准确性差。……

登录APP查看全文

猜你喜欢

无人机特征提取
特征提取和最小二乘支持向量机的水下目标识别
基于Gazebo仿真环境的ORB特征提取与比对的研究
基于Daubechies(dbN)的飞行器音频特征提取
Bagging RCSP脑电特征提取算法
高职院校新开设无人机专业的探讨
利用无人机进行航测工作的方式方法
一种适用于输电线路跨线牵引无人机的飞行方案设计
浅析无人机技术在我国的发展前景
基于MED和循环域解调的多故障特征提取
Walsh变换在滚动轴承早期故障特征提取中的应用