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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。
This paper introduces two methods to realize the backup video auxiliary line superimposition system based on FPGA: based on image storage image design and overlay graphic design based on logic control. Both methods are implemented using a single FPGA chip design, eliminating the need for external memory. Based on the image storage image design, the accuracy of the auxiliary line superposition and the good display effect can be guaranteed. The superposition graphic design based on the logic control utilizes the classical mathematical formula to design the linear superposition module and the circular superposition module. This method occupies fewer internal FPGA resources, runs faster and has more functions. It provides the design basis for other simple graphics overlays. The actual work of both methods can meet the requirements.