针对传统图像处理算法在实际应用中实时性差的问题， 提出在 DM642 上实现

Prewitt 边缘检测改进算法， 并阐述了系统实现所需的硬件组成、 软件设计原理、 EDMA

通道技术等。通过对 Prewitt 算法以及改进的 Prewitt 算法的实验运行， 证明了该系统稳

定， 运行效果良好， 图像处理的速度能达到系统的实时性要求-Traditional image processing algorithms in the practical application of real-time problem of poor Prewitt edge detection improved algorithm on DM642 elaborate system to achieve the required hardware components, software design principles, EDMA channel technology. Proved that the system is stable and running well, the image processing speed to achieve real-time requirements of the system by running experiments on the Prewitt algorithm as well as the improvement of the Prewitt algorithm