随着国内“平安城市”项目的不断完善, 完备的补光系统对于智能交通也就显得越来越重要。首先, 阐述了在智能交通中补光系统的作用、分类及现有补光系统的优缺点; 其后针对在补光中存在的眩目和过曝这两个问题, 设计了一款红外和白光混合排列阵列式发光二极管防眩目补光系统, 完成了其硬件部分和基于现场可编程门阵列(Field Programmable Gate Array, FPGA)自适应算法的软件部分, 并对该系统进行了实际测试。测试结果表明: 补光效果优于白光常亮灯, 且眩目感显著降低; 车牌图像二值化分布均匀, 该补光系统可有效解决车牌过曝问题。

The importance of complete supplemental lighting system was also more obvious with the continuous improvement of China′s "safe city" project. Firstly, the function and classification of the supplemental lighting system, the advantages and disadvantages of the present supplemental lighting system in the intelligent transportation system were expounded. To solve glare and overexposure these two problems in the supplemental lighting system, an anti-glare supplemental lighting system based on array light emitting diode mixed with infrared and white light was designed. Its hardware and software based on field programmable gate array (FPGA) adaptive algorithms were completed, and its effects were tested in the meantime. The test results show that its supplemental lighting effect is better than the white light, and the glare is significantly reduced. Besides, the binarization distribution of license plate images is even. And it is proved that the anti-glare supplemental lighting system could effectively solve the overexposure problem of the license plate.