CCD变积累控制技术

ControllingTechniques of CCDVariable Integration

在分析微光图像噪声特性的基础上，提出了通过对微光图像信号进行积分，抑制随机噪声的方法，发展了ＣＣＤ可变积累控制技术，研制了ＣＣＤ外围驱动控制和视频制式转换系统，使激光图像信号直接在ＣＣＤ电荷包中进行多帧累加，有效地抑制了随机噪声，提高了低照度与低对比情况下的信噪比和灵敏度，同时避免了后续实时处理电路的高原干扰，图像质量有了明显的改善。

On the basis of the analysis and research on the low-light image noise,this paper pre-sents the methods to suppress random noise through the integration of the Iow-light image signals.The controlling techniques of CCD variable integration are studied.The system of CCD peripheral driving control and video pattern transformation is developed.The low- light image signals are multi- frame ac-cumulated in charger-package. The random noise is effectively cortrolled and the signal- noise ratio and sensitivity in the case of low- light level and low-contrast are raised.The high-frequency interference of the later real-time processing circuit is avoided.The image quality is much improved.