多区域图像的快速自动曝光控制方法
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摘要
根据CCD摄像机的成像原理,充分考虑地球大气对宇宙星体辐射的吸收衰减作用,引入了多区域图像曝光时间调节因子,推导得到了多区域图像曝光时间与外界光照变化的关系模型,解决了目前方法存在的弊端;利用CIS的感光特性,根据多区域图像当前的曝光时间、增益值和曝光输出值判断出当前多区域图像的光照强度,设置多区域图像的快速自动曝光控制的基本参数,根据多区域图像的外界光照强度范围查找表,判断多区域图像曝光强度值是否在目标曝光强度值范围内,对多区域图像的自动曝光时间与亮度增益值进行调节,实现曝光控制.实验结果证明,所提方法能够实现多区域图像的快速自动曝光控制,保留了细节信息,稳定性较好.
According to the imaging of the CCD camera Principle,taking full account of the Earth's atmosphere on the absorption and attenuation of the radiation of the universe,the introduction of a multi-regional image exposure time adjustment factor derived multi-region image exposure time and external light changes in the relationship between the model to solve the shortcomings of the current method;CIS based on the current multi-region exposure time,gain and exposure output value to determine the current multi-region image illumination intensity,set the multi-region image of the rapid automatic exposure control basic parameters,according to the multi-region image of the external light Intensity range look-up table to determine whether the multi-region image exposure intensity value is within the target exposure intensity value,and adjust the automatic exposure time and the brightness gain value of the multi-region image to realize the exposure control.The experimental results show that the proposed method can realize the rapid automatic exposure control of multi-area images,retain the details and the stability is good.
According to the imaging of the CCD camera Principle,taking full account of the Earth's atmosphere on the absorption and attenuation of the radiation of the universe,the introduction of a multi-regional image exposure time adjustment factor derived multi-region image exposure time and external light changes in the relationship between the model to solve the shortcomings of the current method;CIS based on the current multi-region exposure time,gain and exposure output value to determine the current multi-region image illumination intensity,set the multi-region image of the rapid automatic exposure control basic parameters,according to the multi-region image of the external light Intensity range look-up table to determine whether the multi-region image exposure intensity value is within the target exposure intensity value,and adjust the automatic exposure time and the brightness gain value of the multi-region image to realize the exposure control.The experimental results show that the proposed method can realize the rapid automatic exposure control of multi-area images,retain the details and the stability is good.
引文
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[10]马泽龙,高慧斌,余毅,等.采用图像直方图特征函数的高速相机自动曝光方法[J].光学精密工程,2017,25(4):1026-1035.
[2]郭磊,郑蝉金,边玉芳.变长CD-CAT中的曝光控制与终止规则[J].心理学报,2015,47(1):129-140.
[3]杨文杰,张志杰,赵晨阳,等.基于零极点配置理论的压力传感器动态特性补偿[J].科学技术与工程,2016,16(2):78-82.
[4]赵天阳,王见.一种用于光照变化图像匹配的改进KAZE算法[J].计算机测量与控制,2017,25(6):185-188.
[5]侯幸林,罗海波,周培培.基于局部信息熵最大的多曝光控制方法[J].红外与激光工程,2017,46(7):255-261.
[6]冯炎.基于背景估计和对比度补偿的退化古籍图像二值化算法[J].科学技术与工程,2015,15(34):105-109.
[7]赵翊君,祁爱华,高丽婷,等.基于传感网的智能建筑设备远程控制方法研究[J].计算机仿真,2015,32(4):376-379.
[8]肖晓,张健.改进的Retinex低照度图像光照补偿算法[J].电子设计工程,2017,25(4):110-114.
[9]杨阳,刘学斌.大孔径静态干涉成像光谱仪曝光时间控制技术[J].光子学报,2015,44(11):49-54.
[10]马泽龙,高慧斌,余毅,等.采用图像直方图特征函数的高速相机自动曝光方法[J].光学精密工程,2017,25(4):1026-1035.