利用单片可编程系统对红外焦平面阵列进行实时非均匀性校正

Real-time nonuniformity correction of infrared focal plane arrays by system on programmable chip

针对红外焦平面阵列(IRFPA)非均匀性多点校正过程中涉及的数据量大,难于实现实时校正的特点,提出了利用Altera公司的单片可编程系统(SOPC)对红外焦平面阵列进行多点实时校正的方法。利用SOPC的NiosII处理器定制指令功能,实现了软件算法的硬件化,有效提高了红外焦平面阵列实时非均匀性校正速度。实验结果表明:对相同的多点校正算法,利用SOPC硬件实现算法的校正速度比TMS320C6201 DSP硬件快1.5倍,且校正过程简单灵活,图像效果理想,能够很好地满足红外焦平面阵列实时非均匀性校正要求。

A multi-point real-time nonuniformity correction method based on a System on Programmable Chip （SOPC） from Altera Company is proposed, for a large amounts of image data need to be processed in the nonuniformity correction of infrared focal plane arrays （IRFPA） and the data are difficult to correct in real-time. By creating custom instructions for the Nios 11 embedded processor,the soft ware algorithms are implemented by a hardware to improve the nonuniformity correction speed of the IRFPA in real time. The experimental results show that the correction speed of utilizing the SOPC hardware has increased by 150% as compared with that of utilizing the TMS320C6201 DSP hardware for the same multi-point correction. The SOPC correction implementation is characterized by its simple and flexible method and clear images, it can satisfy the requirement of real-time nonuniformity correc- tion of IRFPA.