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

作　　者：江浩洋[1] 石岩[1] 邹胜[1] 毛海岑[1] 张天序[1] 

机构地区：[1]华中科技大学图像识别与人工智能研究所,图像信息处理与智能控制国家教育部重点实验室,湖北武汉430074

出　　处：《红外》2004年第1期7-11,共5页Infrared

基　　金：国家自然科学基金资助项目(编号:60135020);国家重点预研项目支持(编号:413010702)

摘　　要：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.

关 键 词：图像处理 非均匀校正 可编程门阵列 红外焦平面阵列 数字信号处理器 浮点转定点运算 

分 类 号：TP332[自动化与计算机技术—计算机系统结构]