CCD相机实时自动调光系统

Real-time auto light control system of CCD camera

为了实时调整高帧频CCD相机,获得高质量图像,提出了一种基于分档电子快门控制和增益控制相结合的复合控制方法,实现了快速、高精度调光。其算法主要由三部分构成:二次均值灰度权值的累加,基于分段二次函数的自动快门控制和基于数据分析的自动增益控制。采用共享的乒乓缓存策略来保证算法在自行设计的硬件平台得到有效验证并连续显示。实验结果表明,该算法具有良好的图像质量,捕获的视频图像在各种条件下,均具有快速的收敛性和适应性。

In order to adjust the brightness of high resolution and frequency images from CCD camera in real time, a complex control method combined auto shuter control with gain control is proposed to realize light control rapidly and precisely. The algorithm mainly consists of three parts： gray bi-average weighted sum, Auto Shutter Control（ASC） based on segmented quadratic function and Auto Gain Control（AGC） based on experiment data analysis. The algorithm verifies and displays on a self-designed hardware platform with a shared Pingpong buffer usage strategy. The experimental results show that proposed algorithm has good image quality, fast convergency and adaptability at different conditions.