Journal of Systems Engineering and Electronics ›› 2022, Vol. 33 ›› Issue (2): 259-268.doi: 10.23919/JSEE.2022.000026

• ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Vision-based aerial image mosaicking algorithm with object detection

Jun HAN(), Weixing LI*(), Kai FENG(), Feng PAN()   

  1. 1 School of Automation, Beijing Institute of Technology, Beijing 100081, China
  • Received:2020-09-25 Accepted:2022-02-15 Online:2022-05-06 Published:2022-05-06
  • Contact: Weixing LI E-mail:3120190878@bit.edu.cn;liweixing@bit.edu.cn;fengkai_bit@outlook.com;andropanfeng@126.com
  • About author:|HAN Jun was born in 1997. He received his B.S. degree from Beijing Institute of Technology (BIT) in 2019. He is a postgraduate student majoring in control science and engineering in BIT. His research interests include computer vision and multi-object tracking. E-mail: 3120190878@bit.edu.cn||LI Weixing was born in 1976. He is a senior experimentalist at the School of Automation in Beijing Institute of Technology (BIT). He received his M.S. degree in pattern recognition and intelligent control from BIT. His research interests include pattern recognition, video analysis, and machine learning. E-mail: liweixing@bit.edu.cn||FENG Kai was born in 1996. He is a postgraduate student majoring in control science and engineering in Beijing Institute of Technology (BIT). He received his B.S. degree from BIT in 2018. His research interests include computer vision and object detection. E-mail: fengkai_bit@outlook.com||PAN Feng was born in 1978. He is an associate professor at the School of Automation in Beijing Institute of Technology (BIT). He received his M.S. and Ph.D. degrees in pattern recognition and intelligent control from BIT. His research interests include intelligent computing and robotics and control. E-mail: andropanfeng@126.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (61603040; 61973036)

Abstract:

Aerial image sequence mosaicking is one of the challenging research fields in computer vision. To obtain large-scale orthophoto maps with object detection information, we propose a vision-based image mosaicking algorithm without any extra location data. According to object detection results, we define a complexity factor to describe the importance of each input image and dynamically optimize the feature extraction process. The feature points extraction and matching processes are mainly guided by the speeded-up robust features (SURF) and the grid motion statistic (GMS) algorithm respectively. A robust reference frame selection method is proposed to eliminate the transformation distortion by searching for the center area based on overlaps. Besides, the sparse Levenberg-Marquardt (LM) algorithm and the heavy occluded frames removal method are applied to reduce accumulated errors and further improve the mosaicking performance. The proposed algorithm is performed by using multithreading and graphics processing unit (GPU) acceleration on several aerial image datasets. Extensive experiment results demonstrate that our algorithm outperforms most of the existing aerial image mosaicking methods in visual quality while guaranteeing a high calculation speed.

Key words: image mosaicking, object detection, grid motion statistic (GMS), mapping