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| Blind Restoration Method of Small Target Image Based on Region Fusion |
| FENG Yuxin， ZHANG Dongdong， LI Xiaorun |
| 1. College of Electrical Engineering， Zhejiang University， Hangzhou 310027， Zhejiang， China；
2. Shanghai Academy of Spaceflight Technology， Shanghai 201109， China |
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Abstract This paper has proposed a blind image restoration method using region fusion for estimating the point spread function to address the blur and noise in complex optical imaging conditions of hypersonic vehicles. Extracting the target region and fusing multiple regions can reduce the estimation error of the point spread function of small target images. Firstly, the boundary extension was utilized to resolve the overlap between the target and image boundary. Then, the estimation accuracy of the point spread function was optimized using multi-region weighted fusion and grayscale matching. After that, the effectiveness of the proposed method has been validated by simulations and real images. The results show that this method can effectively suppress background noise and concentrate the energy distribution of the target, thus improving the sharpness and saliency of small targets. This study provides the foundation for small target recognition and precision strikes of hypersonic vehicles.
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Received: 07 September 2023
Published: 09 January 2024
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2023, Vol. 6 
