数字TDI CMOS成像技术凭借其突出的灵活性、经济性，在航天航空光学遥感领域占据日益重要的地位。然而受数字图像信号叠加原理的限制，其较低的成像动态范围是亟待解决的难题。基于前期研究基础，本项目提出从成像机理角度入手，以实时图像处理为手段优化成像链路、改进高动态成像性能。具体通过深入解析CMOS图像传感器信号产生、传递以及数字TDI信号叠加过程，构建任意级数图像特征的评价机制及其随积分级数变化规律的理论模型；以图像最佳评价参数为边界条件建立迭代求解区域自适应增强变换参数的方程；基于图像融合效果最优化确立增强后图像的融合算法及权重参数动态选择策略；开展多类型场景成像实验，对变换参数和理论模型等进行校验与修正，提升算法的普适性与可靠性。本项目的研究工作不仅对提高面阵CMOS的遥感推扫成像应用水平具有重要的理论意义，而且能为推动数字TDI技术在其他高速运动场景中的高性能应用带来广阔的前景。

Digital TDI CMOS imaging technology is playing an increasingly important role in the field of aerospace optical remote sensing because of its outstanding flexibility and economy. However, limited by the signal superposition mechanism, the low dynamic range of digital TDI is a difficult buy vital problem to be solved. Based on the previous research, we propose the idea of optimizing imaging link and improving imaging performance by means of real-time image processing from the perspective of imaging mechanism. Firstly, through deeply analyzing the generation and transmission of CMOS signals and the signal superposition process of digital TDI, the theoretical model of image evaluation and its law of change with TDI-stages is established. Secondly, taking the best evaluation parameter of image as the boundary condition, an iterative algorithm is proposed to solve the equation of the adaptive enhancement transformation parameters to realize the regional adaptive image enhancement. Thirdly, based on the optimization of image fusion effect, the fusion algorithm of enhanced image and the selection strategy of the weighting factor are constructed, which can effectively guide the image fusion process from the theoretical level. Finally, the imaging experiment of multi-type scene is carried out to verify the transformation model and parameters, and to improve the universality and reliability of the algorithm. The research of this project not only has important theoretical significance to improve the application level of push scan imaging of area array CMOS, but also can bring broad prospects for promoting the high-performance application of digital TDI technology in other high-speed moving scenes.