摘要
介绍了在CCD高速电视测量仪系统中,利用电子快门和可变光阑有机结合,在运动控制卡控制下实现自动调光,扩大了调光的动态范围·采用了平均灰度和峰值灰度加权的办法来获取反馈信号,有效的解决不同背景下自调光系统的适应性·提出了基于二次函数的调光反馈量计算方法,提高了调光过程中的收敛速度,同时也保证了系统有较小的超调量·
Automatic lighting control systems which is controlled by motorial control boards and executed by harmonizing alterable diaphragm with electronic shutter in High-Speed TV Measure Instrument is introduced. In this way, it would widen system＇s dynamic range of adjusting light. Adopting get feedback signal conbined average gray with peak gray, adaptability of automatic lighting control systems can be effectively solved in diversified background. Putting forward arithmetic base on Quadratic Function to calculate feedback quantity, Convergent Velocity during lighting can be improved and smaller overflow of the system can be insured.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2006年第1期158-160,共3页
Acta Photonica Sinica
关键词
平均灰度
峰值灰度
自动调光
二次函数
收敛速度
Average gray
Peak gray
Automatic lighting
Quadratic function
Convergent velocity
