基于高性能DSP的IRFPA非均匀性实时校正技术
Real-Time Nonuniformity-Correction System for Infrared Focal Plane Arrays
投稿时间:2009-09-25  修订日期:2009-09-25
DOI:
中文关键词:  红外焦平面阵列  非均匀性校正  红外成像  小波变换  DSP
英文关键词:Infrared Focal Plane Arrays  Nonuniformity-Correction  Infrared Imaging  Wavelet Transform  DSP
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);陕西省自然科学基金
作者单位E-mail
高国旺 西安电子科技大学西安石油大学 wwgao1205@163.com 
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中文摘要:
      基于离散小波变换理论,提出了一种基于场景的红外焦平面阵列(IRFPA)非均匀性校正算法;该算法选择合适的小波函数,并以快速Mallat算法为基础,给出了适合DSP实时处理的实际算法和处理流程。针对该算法所涉及的运算量和数据量庞大的特点,设计了实时非均匀性校正的红外图像处理系统,该系统是以高性能DSP(TMS320C6713)为核心器件,采用DSP不同的传输通道并行传输数据,并充分利用DSP硬件的并行性和流水线操作进行非均匀性校正;以真实的红外图像序列为例,进行了非均匀性校正的仿真实验,结果表明:基于高性能DSP的非均匀性实时校正系统完全可以达到实时校正的要求,所用算法对慢变化量具有较好的自适应性。
英文摘要:
      Based on the theory of discrete wavelet transform, a based-scene nonuniformity-correction algorithm for infrared focal plane arrays (IRFPA) is presented. In this paper, infrared image sequence is decomposed to the discrete sequence wavelet transform with an appropriate wavelet function, and applied algorithm and operation flow based on Mallat algorithm are gave. For the nonuniformity-correction algorithm based on wavelet transform with massive operand and volumes of data, infrared imaging system is designed to carry out real-time nonuniformity-correction. The system uses high-performance DSP as the core processor, transmits data by way of parallel in different transmission channel, implements nonuniformity-correction using the parallel and pipelining operation of DSP. According to applied algorithm and operation flow for DSP processor, the system simulates the real infrared image sequence. The simulation result indicates the real-time nonuniformity correction system satisfies the real-time requirement completely, and the algorithm can auto-adapt to the slow change parameters that affect the nonuniformity-correction.
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