基于FPGA的两点非均匀校正模块的设计与实现

两点校正算法是一种行之有效的红外图像非均匀校正方法.本文对两点校正算法进行
了分析,并推导出了该算法的定点表示形式.利用FPGA在硬件上实现了该算法,内部采用流水线技术,校正系数存储在FPGA的片内存储器中并实现了盲元补偿.仿真和实验结果证明该设计是可行的,达到了预期效果.
关键词:红外焦平面;现场可编程门阵列;非均匀校正;盲元
Abstract: The algorithm of the two-point correction is an effective nonuniformity correction
method for infrared image .In this paper, the method is analyzed and the formula in the fix-point form is sequently deduced. Moreover, the algorithm is implemented on the hardware structure of FPGA. In the FPGA design, the pipelined technique is applied and the correction coefficient is stored in the interior memory of FPGA, meanwhile, blind pixel compensation is implemented. Both simulation and experimental results demonstrate that the method is feasible and the anticipated effect is achieved.
Keywords: infrared focal plane; FPGA; nonuniformity correction; blind pixel