基于定标积分时间法提高红外成像系统动态范围的研究

Study on Improving Dynamic Range of Infrared Imaging System Based on Calibrating Integration Time

针对目前一些提高红外焦平面阵列(IRFPA)成像系统动态范围的方法存在导致系统实时性较低的问题,提出了一种定标积分时间的方法,在提高IRFPA成像系统的动态范围的同时,也能在一定程度上保证系统的实时性。采用此法,设计了基于现场可编程门阵列(FPGA)的红外图像采集系统,并介绍了系统各个模块的原理和实现方法,最后给出了实验结果。结果表明提出的方法和所设计的系统是可行、有效的。

According to problems of many methods, in order to improve the dynamic range of infrared focal plane arrays （IRFPA）imaging systems ,and to reduce the real-time performance seriously, a calibrating method for integration time was introduced. It not only improved dynamic range of the system, but also ensured the real-time performance to a certain extent. An infrared image acquisition system based on field programmable gate array （FPGA） was designed, the principles and methods of implementation of the various modules were introduced. The experimental results were given finally. The results show that the method proposed in this paper and the design of the system are feasible and effective.