基于自适应扩展卡尔曼滤波的动态单光子成像算法

Dynamic single photon imaging algorithm based on adaptive extended Kalman filter

  • 摘要: 单光子探测技术作为光量子学科方向的重要技术,已经广泛应用在自动驾驶、对地遥感及航空航天等众多领域。三维成像目标常处于运动状态,导致图像帧之间产生结构偏移和配准误差,影响成像清晰度和精度。针对这一问题,提出一种基于自适应扩展卡尔曼滤波的动态单光子三维成像方法,结合图像质量评估结果,对协方差参数自适应调整,并融合图像间匹配特征与时序加权策略,实现目标旋转状态的稳定估计。实验仿真基于生成的单光子三维成像数据进行验证,结果表明所提方法在复杂场景下均能有效恢复目标轮廓与结构细节。与传统方法相比,平均峰值信噪比(peak signal-to-noise ratio,PSNR)提升2.93 dB,结构相似性(structural dissimilarity,SSIM)提升0.115,验证了其在复杂旋转条件下的成像精度与稳健性优势。

     

    Abstract: As an important technology in the direction of optical quantum science, single photon detection technology has been widely used in many fields such as autonomous driving, ground remote sensing and aerospace. The three-dimensional imaging target is often in motion, resulting in structural offset and registration error between image frames, which affects the clarity and accuracy of imaging. Aiming at this problem, we proposed a dynamic single-photon three-dimensional imaging method based on adaptive extended Kalman filter. Combined with the image quality assessment results, the covariance parameters were adaptively adjusted, and the matching features between images and the timing weighting strategy were fused to achieve the stable estimation of the target rotation state. The experimental simulation was verified based on the generated single-photon three-dimensional imaging data. The results show that the proposed method can effectively restore the target contour and structural details in complex scenes. Compared with the traditional method, the average PSNR (peak signal-to-noise ratio) is increased by 2.93 dB, and the SSIM (structural dissimilarity) is increased by 0.115, which verifies its imaging accuracy and robustness advantages under complex rotation conditions.

     

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