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• W4382000781 abstract "The detection of dim and small space-targets is crucial in space situational awareness missions; however, low signal-to-noise ratio (SNR) targets and complex backgrounds pose significant challenges to such detection. This paper proposes a space-target detection framework comprising a space-target detection network and a k-means clustering target centroid positioning method. The space-target detection network performs a three-dimensional convolution of an input star image sequence to learn the motion features of the target, reduces the interference of noise using a soft thresholding module, and outputs the target detection result after positioning via the offsetting branch. The k-means centroid positioning method enables further high-precision subpixel-level centroid positioning of the detection network output. Experiments were conducted using simulated data containing various dim and small space-targets, multiple noises, and complex backgrounds; semi-real data with simulated space-targets added to the real star image; and fully real data. Experiments on the simulated data demonstrate the superior detection performance of the proposed method for multiple SNR conditions (particularly with very low false alarm rates), robustness regarding targets of varying numbers and speeds, and complex backgrounds (such as those containing stray light and slow motion). Experiments performed with semi-real and real data both demonstrate the excellent detection performance of the proposed method and its generalization capability." @default.
• W4382000781 created "2023-06-26" @default.
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• W4382000781 date "2023-05-07" @default.
• W4382000781 modified "2023-09-30" @default.
• W4382000781 title "Dim and Small Space-Target Detection and Centroid Positioning Based on Motion Feature Learning" @default.
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• W4382000781 doi "https://doi.org/10.3390/rs15092455" @default.
• W4382000781 hasPublicationYear "2023" @default.
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