嵌入式平台下的两级自适应动态调光方法  

Two Stage Adaptive Dynamic Dimming Method in Embedded Platform

作　　者：刘峰[1,2] 霍文甲[1,2] 王向军 LIU Feng;HUO Wenjia;WANG Xiangjun(State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China;Key Laboratory of MOEMS of the Ministry of Education, Tianjin University, Tianjin 300072, China)

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]天津大学微光机电系统技术教育部重点实验室,天津300072

出　　处：《弹箭与制导学报》2019年第2期83-87,91,共6页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(51575388)资助

摘　　要：对于小型化成像探测器,自动调光方法的有效与否直接影响后续的目标检测和跟踪效果。本文将亮度直方图的自适应调光方法和图像熵搜索方法相结合,提出一种新的基于嵌入式FPGA的自适应动态调光方法。由于FPGA的并行计算优势,各功能模块可以同时运行互不干扰,很好的满足了实时性的需求,同时给出了时序控制电路中的关键技术和成像实验。实验结果表明,该自动调光方法在多种光照条件下具有很好的环境适应性。For small imaging detectors, the effectiveness of the automatic dimming method directly affects the subsequent target detection and tracking effect. A new adaptive dynamic dimming method based on embedded FPGA was proposed in this paper, which combined brightness histogram adaptive dimming method with image entropy search method. Because of the parallel computing advantage of FPGA, each function module could be running at the same time, and it met the need of real time. The key technologies in timing control circuit and imaging experiments were given. The experimental results show that the automatic dimming method has good environmental adaptability under a variety of illumination conditions.

关 键 词：图像熵 亮度直方图 自动调光控制 FPGA 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置]