实时图像采集及边缘提取ASIC设计

The ASIC design for real-time image acquisition and edge extraction

建造图像系统追求的是数据吞吐量和处理速度，为了提高实时性，一些关键的功能必须用ＶＬＳＩ硬件来实现．作者研制的ＩＡＡｐ系统可以完成图像的采集和处理．文中着重介绍了系统中的板级方案以及其中的ＡＳＩＣ设计．具体电路采用ＦＰＧＡ的形式来实现，共计使用了一块２０００门和两块４２００门的芯片来完成２５６×２５６×８位、５１２×５１２×８位图像的采集和线图像边缘提取等功能．系统的联试是成功的．该方案的优点在于印制板简化，实时性提高，可靠性改善，具有可扩充性和可移植性．

The crux of the matter for buildin8 an image acquisition and processing system is the pro-cessing speed and data throughput.To improve the real-time performance,the key functionsshould be implemented with VLSI hardware. The authors have worked out a 386 microcom-puter based IAAP system to fulfill the functions of image acquisition and proceSsing,with em-phasis on the intreduction of the system board level hardware implementation scheme with theASIC design. The concrete circuit is completed in the form of FPGA.One chip with 2000gates and two chips with 4200 gates are used to implement the functions of 256×256×8 bits,512×512×8 bits data acquisition,in1e image extraction and edge detection. The on-line sys-tem experiment is successful.The merit for this scheme is the simplification for PCB design,the enhancement of real-time performance,the good reliability,expansibility and portability.