Optics and Precision Engineering, Volume. 32, Issue 23, 3436(2024)
Stars removal of all day time mid-high orbit target detection system
In ground-based optical detection systems for mid-high orbit targets during daytime, the extremely low SNR (Signal-to-Noise Ratio) of mid-high orbit imaging necessitates the use of multi-frame joint correlation detection techniques for target extraction. To address the challenge of target extraction caused by stellar paths, this paper introduces a stars removal algorithm for single-frame images. The process involves generating a background image with replaceable stars from the original image, identifying suspected targets in a single frame based on stellar imaging characteristics, detecting real stellar targets through single-frame and multi-frame association methods, and replacing stellar targets in the original image with corresponding background pixels. Experimental results show the algorithm effectively removes stars with apparent magnitudes of 4 to 9, achieving an average removal success rate of 98%. After multi-frame joint correlation detection, target intensity remains unchanged, while stellar paths are significantly reduced. The algorithm processes a full-frame image in under 12ms, meeting the real-time requirements of a 25 Hz camera frame rate. This approach significantly enhances the extraction of mid-high orbit targets using multi-frame joint correlation detection.
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Liduo SONG, Kainan YAO, Zhiqiang XU, Jianli WANG, Jian GU, Sheng QUAN, Ming CHEN, Haoran JIA. Stars removal of all day time mid-high orbit target detection system[J]. Optics and Precision Engineering, 2024, 32(23): 3436
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Received: Jun. 8, 2023
Accepted: --
Published Online: Mar. 10, 2025
The Author Email: YAO Kainan (yaokainan@126.com)