反走样字符图形叠加算法与FPGA快速实现

Anti-aliased Character Graphics Overlay Algorithm and Fast Implementation on FPGA

为了提高机载平视显示系统中反走样字符图形与背景视频叠加输出的显示效果,提出一种反走样字符图形与视频叠加算法并通过FPGA快速实现。叠加过程中增加反走样字符图形背景融合计算,使反走样字符图形与背景视频叠加后边缘光滑过渡,系统使用两片DDR3分别存储视频和图形数据,两者并行处理,提高系统整体性能,优化背景融合算法DDR3实现流程,降低DDR3中断复杂度。结果表明,该系统整体性能得到提高,叠加融合画面效果良好,灵活性强,适用于机载座舱显示系统。

In order to improve the display effect of anti-aliased symbol and video superposition in the airborne head-up display system, a kind of anti-aliased symbol and video overlay algorithm is proposed and is realized on FPGA. By adding the background fusion calcula- tion,the adjacent edges of anti-aliased symbol and video is smooth. Two DDR3 are used to store the video and graphic data respectively, both parallel process to improve the overall performance of the system. Optimization of the implementation process of background fusion algorithm,the complexity of the DDR3 interrupt is reduced. The experiment results show that the overall performance of the system is improved, and the overlay fusion image has good effect and high flexibility, which is suitable for the display system of the airborne cockpit.