基于DSP+FPGA技术的两点法非均匀校正模块设计

DSP and FPGA-based Design of Nonuniformity Correction Using Two-point Method

对两点非均匀算法进行了分析,并推导出了其公式的定点形式。利用DSP+FPGA结构在硬件上实现了该算法。DSP负责浮点转定点运算;FPGA则实现非均匀校正公式定点形式的运算,其内部采用流水线技术,速度最高可达80MHz处理一个像素。该模块是在Altera公司的APEXII系列的FPGA上实现的,并且在运动目标红外凝视探测识别跟踪处理器上获得成功运用。

The two-point nonuniformity correction method is analyzed and the formula in the fix-point form is sequently deduced. Moreover, the algorithm is implemened on the hardware structure of DSP+FPGA. The DSP is used to change the data of float-point into fix-point, while the FPGA is used to fulfil the task of nonuniformity correction according to the fix-point fomula. Since the Pipelined technique is applied in the FPGA design, the processing speed can reach 80MHz for each pixel. The module has been designed on the APEXII series FPGA and performed well in the moving target infrared image proccessor project.