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小型化高速DSP微光视频图像处理器的研究

Study of the Minitype Low-Light-Level Video Processing System with High-Speed DSPs

【作者】 李武森

【导师】 迟泽英;

【作者基本信息】 南京理工大学 , 光学工程, 2003, 博士

【摘要】 将先进的高速数字信号处理(DSP)技术应用于微光视频图像的处理,是当前提高微光电视系统整机性能指标系统工程的一个重要技术途径。本论文重点对以TMS320C6201B为核心的小型微光视频图像处理器总体方案、全部硬件电路、软件主体结构、系统图像处理算法以及相关关键技术进行研究。研制该处理器对于改善微光电视系统的像质、提高其作用距离,并实现包含微光视频图像处理器在内的整个微光电视系统的小型化、智能化、低功耗以及图像处理的高速度等具有重要意义。 论文全面分析了微光视频处理技术的国内外发展状况,并以“BBG-302型便携式潜望镜”的小型微光视频观察系统为结合点,深入研究了与高速DSP微光视频图像处理全过程各关键技术密切相关的理论问题;论证并设计了以TMS320C6201B为核心的小型化高速DSP微光视频图像处理器总体方案;设计了系统完整的硬件电路原理图和软件流程图;完成了系统全部电路板的技术设计与制作,并对系统进行了阶段性的初步调试;论文还就目标运动对微光视频图像处理效果的影响进行了深入探讨,并针对实际的微光视频图像,进行了噪声滤波与灰度变换二者相结合的仿真处理效果分析,据此提出了“目标运动检测+噪声滤波+灰度变换”的系统图像处理总体算法模式;最后,对系统进行了阶段性调试,并给出了初步调试结果。 样机阶段性调试实践表明,论文工作较圆满地完成了本课题预定的各项任务。总体技术方案正确可行,硬件电路以及相关软件设计合理,系统算法行之有效。

【Abstract】 Applying high-speed DSP technology to low-light-level (LLL) video processing is an important technology approch to improve the performance of LLL-TV system. In this dissertation, the realizing method of the minitype LLL video processing system centered about TMS320C6201B is studied. It is significant to realize the LLL image’s noise filtering and gray shifting, thus improving the image’s quality and system’s operating distance on the base of portable, low power consumption and high speed of image processing. Firstly, the internal and international development of the LLL video processing technology in recent years has been reviewed in this dissertation. Then several theory problems associated closely with LLL video processing are discussed in detail. The realizing method of the minitype of LLL video processing system centered about TMS320C6X is also studied. For the system’s image processing arithmetic, the mode of "motion detection + noise filtering + gray shifting" is brought forward based on associated analyzing. In the last part of the dissertation, the debugging method of the minitype LLL-video processor with high-speed DSP is discussed and the results of debugging are given and analyzed. These results show that the system’s design scheme is feasible, and the system’s hardware and software works in gear.

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