基于FPGA的多路图像采集系统的软件设计  

The software design of multi-channel image acquisition system based on FPGA

作　　者：付强[1] 夏靖波[1] 杨军[1] 

机构地区：[1]西安工业大学计算机科学与工程学院,陕西西安710032

出　　处：《电子设计工程》2011年第3期174-177,共4页Electronic Design Engineering

摘　　要：分析了现有的视频采集方案的研究现状,对如何采用CCD摄像头采集多通道、高分辨率、高质量的图像以及基于FPGA的嵌入式图像采集系统的实现方法做了研究。与传统图像采集系统相比,该系统主要利用四片视频解码芯片SAA7113H和两片FPGA完成对四路图像的同时采集、存储和显示,能根据FPGA里UART模块接收到的指令切换一路图像在LCD或是VGA上全屏显示。实现了对两个FPGA的级联配置,针对视频解码芯片ADV7181B,实现了I2C总线配置、ITU656解码以及数据格式的转换。并根据多次实验,对最终显示图像的抖动现象作了分析和提出解决方法。结果证明,该系统具有低成本、高可靠、灵活性好等特点。This paper analyzes the research status about Video Capture schemes,which have studied how to use CCD camera to acquire multichannel, high-resolution and high-quality images, and to realize FPGA-based embedded image acquisition system. In contrast with the traditional image acquisition system, the embedded image acquisition system mainly uses four SAA7113H video decoders and two FPGA to achieve the acquisition, storage, and display of two channel image, in addition, according to the received instructions of UART module, can switch one channel image on the LCD or VGA full-screen. It further realizes the cascade configuration of two FPGA, and the FC omnibus configuration, the ITU656 decoding, and the data format conversion on the ADV7181B video decoder. Furthermore, based on multiple experiments, scholars analyzed the dithering of final display image and put forward a solution. The results have showed that the system has low-cost, high-reliability and great flexibility.

关 键 词：SAA7113H FPGA ITU565 图像采集 

分 类 号：TP919[自动化与计算机技术]