介绍了两种基于FPGA的倒车视频辅助线叠加系统的实现方法: 基于图像储存映像设计和基于逻辑控制叠加图形设计。两种方法均采用单片FPGA芯片设计实现, 无需外部存储器。基于图像储存映像设计能够保证辅助线叠加的准确性以及良好的显示效果；而基于逻辑控制叠加图形设计则是运用经典数学公式, 设计了直线叠加模块和圆弧叠加模块。该方法占用FPGA内部资源较少, 运行速度较快, 功能丰富, 为其他简单图形叠加提供了设计依据。两种方法的实际工作效果均能满足使用要求。

Two kinds of design and implementation of a reversing video superposition of auxiliary line system were introduced based on FPGA: the design of the image storage image and the logic control . Without the external memory, the two methods used one single FPGA chip to meet the design requirements. The design of the image storage image could ensure the accuracy of the auxiliary line superposition to have a good display effect. The design of the logic control used the classical mathematics algorithm to create the modules of the linear superposition and the circular arc superposition, which had advantages of using less FPGA resources, having faster running speed and rich functions, as well as providing the basis for other simple graphics. It shows that the two methods could both satisfy the practical requirements.