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针对现有编码矩阵存在的不足,提出了一种编码孔径成像光谱系统编码矩阵设计方法。首先阐述了称重设计原理和优良性准则;然后研究了单矩阵编码方法和互补矩阵编码方法,并推导得到H_N~+/H_N~-双矩阵编码的平均均方误差性能公式;最后基于数字微镜器件(DMD)结构特点,提出SN单矩阵和H_N~+/H_N~-双矩阵相结合的双模式编码方法,以及共享硬件加速处理资源的解码方法。实验结果表明,新方法相比原有编码矩阵能够进一步提高信噪比,同时解码加速处理保证了实时性能。
Aiming at the shortcomings of existing coding matrix, a coding matrix design method for coding aperture imaging spectroscopy system is proposed. Firstly, the principle of weighing design and the principle of goodness are described. Then the single matrix coding method and complementary matrix coding method are studied, and the average mean square error performance formula of H_N ~ + / H_N ~ - double matrix coding is deduced. Finally, This paper proposes a dual-mode coding method based on the structure of DMD and the single-matrix coding method based on SN single matrix and H_N ~ + / H_N ~ - dual matrix. The decoding method of shared hardware acceleration processing resource is proposed. The experimental results show that the new method can further improve the signal-noise ratio compared with the original coding matrix, and the decoding acceleration processing ensures the real-time performance.