针对传统视频采集设备体积比较大、处理功能简单、灵活性不强等不足，提出了一种基于DM642和CPLD图像采集处理系统的解决方案。系统由DM642通过配置TVP5150视频解码芯片读取视频图像数据，并进行图像处理,SAA7121H视频编码芯片完成处理后输出图像，CPLD芯片作为系统逻辑控制。实验结果表明，该系统达到预期的效果。后续该系统将用于红外热成像的大空间火灾探测。

Because of the disadvantages of traditional video acquisition devices, such as large volume, simple processing capability and low flexibility, an image acquisition and processing system based on DM642 and CPLD chips is proposed. In the system, the DM642 chip is used to configure a TVP5150 video decoding chip for reading out video image data and processing them. A SAA7121H video coding chip is used to process the data and output them. The CPLD chip is used as the logic controller of the system. The experimental result shows that this system has achieved its desired effectiveness. In the future, the system will be used in the infrared thermal imaging for large space fire detection.