【作者】 林琳；

【导师】 王向军；

【作者基本信息】 天津大学 ， 仪器仪表工程， 2014， 硕士

【摘要】 在双目立体视觉、三维成像以及多目标视频监控等视频技术的应用中，对目标从多个方位和不同角度获取图像非常关键，只有采用多通道视频影像处理技术才能满足实时性要求。传统的多通道视频系统，均采用多个独立的视频接口和多个视频通道独立传输的方式，这种方式增加了后级视频处理系统对多个通道的视频进行同步采集和数据传输的难度。同时，随着视频技术在便携式立体视觉测量仪器以及微小型视频影像设备中的广泛应用，视频影像系统对微小型化设计的要求越来越高。因此，寻求一种能够满足微小型化并采用一个视频接口同步传输多个通道视频影像的视频传输技术，具有非常重要的意义。CMOS成像器具有高集成度、低功耗、高性价比等优点，已经广泛应用于工业领域。本文提出了一种以CPLD为核心的一拖N个CMOS成像器的同步影像传感系统的体系结构和实现方法，实现了系统同步获取N个通道的CMOS成像器所采集的图像，并通过一个视频接口以相同帧率输出N个通道视频影像的功能。为了验证这种方法的可行性，本文提出了一个双CMOS成像器同步影像传感器系统的实现方法，该系统通过一个VGA视频接口同步传输两个视频通道的视频影像。另外，该系统具有单通道视频传输和多通道视频同步传输两种工作方式，并且具有视频冻结的功能。本文详细地介绍了系统的工作原理以及设计过程。系统包括系统硬件结构设计，以及CPLD数字逻辑系统的构建。为了提高系统的实时性和可靠性，在视频流的传输和存储设计中，采用了乒乓操作的流水线技术。最后，时序仿真以及系统硬件调试的结果表明，该系统设计方案稳定可靠，并满足了微小型化系统设计需求。更多还原

【Abstract】 In the application of binocular stereo vision, three dimensional imaging andmulti-object video supervisory, it’s very critical to acquire the images of the targetfrom multiple positions and various angles, and the multi-channel video imageprocessing technology is the only way to meet the requirement. In the traditionalmulti-channel video system, data is transferred through independence interfaces bymeans of multiple video channels independently transporting. However, it increasesthe difficulty for backward video processing system to capture video and transfer datasynchronously from different channels of video. Along with the widespreadapplications of video technology in portable stereo vision measuring instruments andmicro-miniature video equipment, the demand of microminiaturization in video imagesystem becomes increasingly high. As a consequence, it will be of great significanceto look for a video transmission technology, which enables to transfer multichannelvideo synchronously with a video interface only.Because of the various advantages of CMOS sensor, such as high integration,relatively low power consumption and high cost effectiveness, CMOS sensor has beenwidely applied in industrial field. An architecture and implement method of “onedriving N” CMOS sensor image synchronization sensing system is proposed in thispaper. The system acquires the images from N channels of CMOS sensorsynchronously, and then outputs them through a video interface. In order to illustratethe feasibility of this design, an implementation method of dual-CMOS sensor imagesynchronization sensing system is proposed in this paper. The system transfersdual-channel video image data via a VGA video interface. In addition, it can beswitched working as the single channel output mode and dual-channel synchronousoutput mode, with function of video freezing. This article details the workingprinciple of the system，and the design process of the system, which includes thedesign of system hardware structure and the building of CPLD digital logical system.For purpose of improving the real-time performance and the stability of the system,Ping-Pong operation technique is applied in the video streaming transmission andstorage. At last, results of the timing simulation and hardware debugging of thesystem show that the proposed system design functions stably and reliably and meets the need of miniaturization of system.更多还原