采用DM3730的高清视频采集与处理系统研究

发布时间：2019-03-25 16:23

【摘要】：视频技术在安防监控、医疗卫生、视频通信等领域应用越来越广泛，而高清视频应用是现在以及未来发展重点。衡量清晰度的指标是图像分辨率，分辨率越大图像越清晰，也就意味着每帧视频数据越大，但目前市场上大部分视频应用系统还不具备高清视频采集与处理能力，其主要原因之一是以往的嵌入式处理器达不到处理高清视频数据能力，这个硬件上的技术瓶颈阻碍了嵌入式高清智能视频处理系统在医疗、监控等行业的发展。基于此背景，本文提出了一款具有智能图像处理功能的嵌入式高清视频采集与处理系统。本文首先分析视频采集系统现状，在比较现有利弊情形下，提出了具有智能图像处理功能的嵌入式高清视频采集与处理系统总体设计方案。围绕这个方案详细介绍了具体实现过程，主要包括以下内容： 1.系统硬件设计。主要包括视频采集、处理器、电源、USB、串口、ISP、MMC、HDMI等模块电路原理图设计。 2.嵌入式Linux软件开发平台搭建。包括系统内核裁剪与移植、交叉编译环境搭建、BootLoader编译移植以及文件系统制作等。 3.系统软件的设计。包括视频驱动设计及配置，采集程序设计以及图像增强、边缘检测、人脸跟踪等视频处理算法实现。 4. QT界面设计及OSD功能实现。总的来说，，本文针对的高清视频采集与处理系统，能够达到720p/30f的要求，理论上可以达到720p/60f。支持视频图像的边缘检测、图像增强、人脸跟踪、底片视频等处理功能以及具有人机交互界面。该系统在医学图像处理和安防监控等领域具有广泛的应用前景。
[Abstract]:Video technology is more and more widely used in security surveillance, health care, video communication and other fields, and high-definition video application is the focus of development at present and in the future. The definition of the image is measured by the resolution of the image, the greater the resolution, the clearer the image means the larger the video data per frame, but at present most video applications on the market do not have the ability to capture and process high-definition video. One of the main reasons is that the previous embedded processors can not process high-definition video data. The technical bottleneck of this hardware hinders the development of embedded high-definition intelligent video processing system in medical, monitoring and other industries. Based on this background, this paper presents an embedded high-definition video acquisition and processing system with intelligent image processing function. In this paper, the present situation of video capture system is analyzed, and the overall design scheme of embedded high-definition video acquisition and processing system with intelligent image processing function is put forward based on the comparison of the advantages and disadvantages of the existing system. The detailed implementation process around this scheme is described in detail, which mainly includes the following: 1. System hardware design. Mainly including video capture, processor, power supply, USB, serial port, ISP,MMC,HDMI module circuit schematic design. 2. Embedded Linux software development platform. It includes kernel tailoring and porting, cross-compiling environment, BootLoader compiling and porting, file system making and so on. 3. The design of system software. Including video driver design and configuration, acquisition program design and image enhancement, edge detection, face tracking and other video processing algorithms. 4. QT interface design and OSD function realization. In general, the high-definition video capture and processing system in this paper can meet the requirements of 720p/30f, and in theory it can reach 720p / 60f. Support video image edge detection, image enhancement, face tracking, negative video processing functions and human-computer interface. The system has wide application prospects in medical image processing, security monitoring and other fields.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP368.1;TP274.2

【参考文献】