通用CCD图像测试系统的研究与实现

发布时间：2018-07-27 16:53

【摘要】：高分辨率遥感CCD相机在国民经济和国防建设领域中发挥着越来越重要的作用,而我国在这方面的技术水平还比较落后。新型遥感CCD相机系统的研制正是在这种形势下开展的。但是由于相机使用的CCD芯片价格昂贵、容易损坏,同时实际CCD成像电子学系统的研制周期很长,为了能够及时测试后端电路系统的设计性能,就提出了本文所论述的课题——通用CCD图像测试系统的研究与实现。本课题主要设计并实现了一套完整的图像测试系统。该系统不仅能够模拟实际CCD成像电子学系统的功能,为后端电路系统的测试提供准确、稳定的图像数据流或者为后端不同的视频信号处理电路提供所需的模拟CCD信号;另外,该通用CCD图像测试系统还可以作为实验型的图像处理系统,在此系统上,能够实现不同的图像处理算法和相关电路。该通用CCD图像测试系统包括三块PCB板,即数字系统板、接口板和模拟信号产生板。数字系统板是基于FPGA的,该系统的主要功能都是在数字系统板上完成的,包括数据的下载、存储、数据格式转换、控制数据的输出以及模拟信号产生板所需图像数据和控制信号的产生与传输;接口电路板主要是提供图像数据输入/输出的接口;模拟信号产生板主要完成系统的CCD模拟信号产生部分的功能。本系统的研制成功具有很重要的现实意义:可以根据需要模拟各种CCD成像电子学系统输出的不同时序的数字图像信号,然后通过不同类型的接口输出图像数据或CCD图像信号,具有很强的灵活性;可以提前测试后端电路系统的性能,有效地减少研制时间;可以模拟含有各类噪声的CCD输出图像,使后端电路的调试更加接近成像实际情况;同时还可以作为实验型图像处理系统,实现不同图像处理算法和相关电路。本系统最大的特点就是通用性强,功能丰富。
[Abstract]:High-resolution remote sensing CCD camera plays a more and more important role in the field of national economy and national defense construction. The development of a new remote sensing CCD camera system is carried out in this situation. But because the CCD chip used in the camera is expensive and easy to damage, and the real CCD imaging electronic system has a long development period, in order to test the design performance of the back-end circuit system in time, The research and implementation of a general CCD image testing system is presented in this paper. In this paper, a complete image testing system is designed and implemented. This system can not only simulate the function of real CCD imaging electronic system, but also provide accurate and stable image data flow for the test of back-end circuit system, or provide analog CCD signal for different back-end video signal processing circuits. The universal CCD image testing system can also be used as an experimental image processing system, on which different image processing algorithms and related circuits can be implemented. The universal CCD image testing system consists of three PCB boards, namely, digital system board, interface board and analog signal generation board. Digital system board is based on FPGA, the main functions of the system are completed on the digital system board, including data download, storage, data format conversion, The output of the control data and the generation and transmission of the image data and the control signal required by the analog signal generator board, the interface circuit board mainly provides the interface of the image data input / output; The analog signal generating board mainly completes the function of the CCD analog signal generation part of the system. The successful development of this system has very important practical significance: we can simulate the digital image signals of different time series produced by various CCD imaging electronic systems according to the need, and then output image data or CCD image signals through different types of interfaces. It has strong flexibility, can test the performance of back-end circuit system in advance, reduce the development time effectively, simulate the output image of CCD with all kinds of noise, and make the debugging of back-end circuit more close to the actual condition of imaging. It can also be used as an experimental image processing system to realize different image processing algorithms and related circuits. The biggest characteristic of this system is that it has strong versatility and rich functions.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP751

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