一种双通道图像采集及显示系统设计

发布时间：2018-04-15 03:12

本文选题：双通道 + 可编程逻辑单元　；参考：《天津大学》2014年硕士论文

【摘要】：图像采集显示系统是当今研究的一个热点,在某些特殊的环境要求下,使用单通道图像系统难以完成对不同视场数据的同时采集和高速实时的处理显示。为实现对不同视场图像的同时采集,本文设计并实现了一种基于CPLD和SDRAM的双通道图像采集显示系统。使用OV7725 CMOS图像传感器进行视频采集,以CPLD芯片作为核心处理芯片,完成传感器的SCCB协议配置,同时控制SDRAM的配置和读写,采集并存储源自两个不同通道的图像数据,使用VGA转换芯片进行图像数据解码,通过VGA接口在显示器上进行显示。具体成果如下:1、完成系统的架构设计和芯片选择,设计各模块电路,基于Verilog HDL完成了数据处理和芯片控制的设计仿真及验证。2、使用FPGA对SDRAM控制和图像传感器的采集效果进行验证。设计了串口通信,将数据回传电脑并还原为BMP图像,验证了系统功能的正确性。3、实现了最小化系统,进行高密度PCB设计,完成芯片的安装,并对整体系统的各参数和功能进行封装测试。本文设计了双通道图像采集与实时显示的最小化系统,系统尺寸为Φ40mm×4cm,显示速度可以达到每秒60帧,分辨率为600×800,系统工作频率为100MHz,工作电压5V,工作电流约为350mA,输出为VGA标准格式。本系统具有低功耗、低成本、体积小等优点,并可在多种的环境条件下使用,具有广泛的应用性。
[Abstract]:Image acquisition and display system is a hot topic in the present research. Under some special environment requirements, it is difficult to complete the simultaneous acquisition of different field of view data and high-speed real-time display by using single-channel image system.In order to realize the simultaneous acquisition of different field of view images, a dual-channel image acquisition and display system based on CPLD and SDRAM is designed and implemented in this paper.The OV7725 CMOS image sensor is used for video acquisition, and the CPLD chip is used as the core processing chip to complete the SCCB protocol configuration of the sensor. At the same time, the configuration and reading and writing of SDRAM are controlled, and the image data from two different channels are collected and stored.VGA conversion chip is used to decode image data and display on display through VGA interface.The concrete results are as follows: 1, complete the system architecture design and chip selection, design each module circuit,The design, simulation and verification of data processing and chip control are completed based on Verilog HDL. FPGA is used to verify the effect of SDRAM control and image sensor acquisition.The serial communication is designed, the data is sent back to the computer and restored to the BMP image, the correctness of the system function is verified. The system is minimized, the high density PCB is designed, and the chip is installed.The parameters and functions of the whole system are tested and encapsulated.In this paper, a minimization system of dual-channel image acquisition and real-time display is designed. The system size is 桅 40mm 脳 4 cm, the display speed can reach 60 frames per second, the resolution is 600 脳 800, the operating frequency of the system is 100 MHz, the working voltage is 5 V, the working current is about 350 Ma, and the output is VGA standard format.The system has the advantages of low power consumption, low cost, small volume, and can be used in a variety of environmental conditions, with a wide range of applications.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN873;TP274.2

【参考文献】