【摘要】 两维图像相关跟踪是空间太阳望远镜1m光学系统达到0·1″分辨率关键之一.介绍了基于FPGA实现SST相关算法的方法,如2×2矢量基蝶形FFT、模块化结构、两级状态机、动态块浮点、并行流水时序等.20MHz下32×32图像相关算法在XCV800芯片上实现仅713微秒,像元拟合精度优于1/50.更多还原

【Abstract】 2-D image correlation tracking is a key factor for the 1m optical system on SST (Space Solar Telescope) to reach its 0.1″spatial resolution.The image correlation algorithm’s FPGA implementation methods are introduced:2×2 radix butterfly-algorithm,modular structure,two levels infinite state machine,dynamic block float-point,and parallel processing sequence.Only 713us is needed to realize a 32×32 image correlation algorithm on XCV800 FPGA chip with 20MHz clock.Tracking precision is better than 1/50 pixel.更多还原