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结合嵌入式Linux结构简单、灵活、低成本、高性能的特点以及图像采集系统的广泛应用,介绍了在Linux系统下基于QT开发图像采集系统的方法,给出了基于AT89C2051处理器以及SAA7111A视频采集芯片的嵌入式图像采集系统的设计方案,分析了图像采集卡的工作原理,并结合CPLD实现了对整个采集过程的控制。介绍了QT和Linux下串口通信的特点,并对如何编写基于QT的串口通信、图像传输、图像处理和图像显示等程序进行了讨论。
Combined with the advantages of simple, flexible, low cost and high performance of embedded Linux architecture and the wide application of image acquisition system, this paper introduces a method of developing image acquisition system based on QT in Linux system, and presents a video acquisition system based on AT89C2051 and SAA7111A Chip embedded image acquisition system design, analysis of the working principle of the image acquisition card, combined with CPLD to achieve the entire acquisition process control. This paper introduces the characteristics of serial communication under QT and Linux, and discusses how to write QT - based serial communication, image transmission, image processing and image display.