一种红外图像非均匀性校正新方法的DSP实现

DSP implementation of new nonuniformity correction method for infrared image processing

TMS320DM642是一款新型高速数字信号处理器,本文以TMS320DM642为主要元件构建了红外图像处理系统,并采用新的非均匀性校正方法——"曲线-直线"法,实现了对红外图像的实时校正。"曲线-直线"具有计算公式简单、计算量小、校正精度高的优点。实验结果表明,图像处理系统运行稳定可靠,在该系统上实现"曲线-直线"校正算法完全满足实时性要求,使用"曲线-直线"校正法校正后的平均非均匀度可降低至1%,具有比两点校正法更高的实用价值。

TMS320DM642 is a high-speed digital signal processor. Based on TMS320DM642, an infrared image processing system is completed and real-time correction for infrared image is achieved using the new nonuniformity correction method--＂ curve-beeline＂ correction. The method has perfect performances of high precision, less complexity and less calculation. Experiment result shows that the system is stable and meets the real-time requirement. The average nonuniformity after the ＂curve-beeline＂ correction could be decreased down to 1% and the proposed method has better practicability than two-point correction method.