基于DMD的编码孔径成像光谱仪编码矩阵设计  

Mask Design for Coded Aperture Spectral Imager Based on Digital Micromirror Device

作　　者：张昊[1] 汤心溢[1] 于洋[1] 张宁[1] 

机构地区：[1]中国科学院上海技术物理研究所,上海市现场物证重点实验室,上海200083

出　　处：《半导体光电》2016年第5期735-741,共7页Semiconductor Optoelectronics

基　　金：国家“863”计划项目(2011AA7031002G);上海现场物证重点实验室基金项目(2011xcwzk04);中国科学院上海技术物理研究所创新专项项目(Q-ZY-108)

摘　　要：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。A novel mask design for coded aperture spectral imaging system was proposed, aiming to complement the disadvantages of existing encoding Matrix. First, the theory of weighing design and three optimal criteria were enunciated. Then the single mask encoding and the complementary masks encoding were discussed, and the formula of average mean squared error for HN^＋/HN^- masks was presented. Finally, the new mask design method was introduced based on the inherent structure of digital micromirror device. The new method consists of bipattern encoding process of combining SN mask with HN^＋/HN^- masks, and fast decoding process of sharing hardware accelerator. Experimental results indicate that the proposed design can not only be superior to conventional methods for improving the SNR, but also guarantee real-time performance by decoding acceleration.

关 键 词：编码孔径 信噪比 实时性 数字微镜器件 硬件加速 

分 类 号：TP702[自动化与计算机技术—检测技术与自动化装置]