Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
School of Physics, Northeast Normal University, Changchun 130024, China.
Sensors (Basel). 2018 Aug 11;18(8):2632. doi: 10.3390/s18082632.
In this paper, the performance of the electronic conventional image motion compensation (IMC) method based on the time delay integration (TDI) mode was analyzed using the optical injection formula of charge coupled devices (CCDs). The result shows that the non-synchronous effect of charge packet transfer caused by line-by-line transfer during exposure makes the compensated image dissatisfying. Then an improved electronic IMC method based on the CCD multiphase structure was proposed. In this method, a series of proper driving clocks were applied to drive the charge packet to move electrode-by-electrode during the exposure time, which results in a minimum non-synchronous effect of charge packet transfer. The mismatch of velocity between charge packet transfer and image motion was decreased. The performance of the improved electronic IMC method was also analyzed using the optical injection formula. The modulation degrees of the two methods were compared. The average value of the modulation degree of the improved electronic IMC method was 47/96, greater than the conventional electronic IMC method, which was 1/3. To achieve the improved electronic IMC, the driver timing diagram of the improved electronic IMC method was proposed. This paper presented an improved hardware implementation method for the improved electronic IMC method. Based on the basic FTF4052M drive circuit system, an IMC pulse pattern generator that worked together with the main pulse pattern generator (SAA8103) was added to achieve the improved electronic IMC. Then, the internal structure of the IMC pulse pattern generator was given. A dual pulse pattern generator drive circuit system was proposed. After computer simulation and indoor real shot verification, the compensation effect of the improved electronic IMC method was better than the compensation effect of the conventional electronic IMC method.
本文利用电荷耦合器件（CCD）的光学注入公式，分析了基于时间延迟积分（TDI）模式的电子传统像移补偿（IMC）方法的性能。结果表明，曝光过程中逐行转移引起的电荷包转移的非同步效应使得补偿后的图像令人不满意。然后提出了一种基于 CCD 多相结构的改进型电子 IMC 方法。在该方法中，在曝光期间，应用一系列适当的驱动时钟逐电极驱动电荷包移动，从而使电荷包转移的非同步效应最小化。减小了电荷包转移与图像运动之间的速度失配。利用光学注入公式对改进后的电子 IMC 方法的性能进行了分析。比较了两种方法的调制程度。改进后的电子 IMC 方法的调制程度平均值为 47/96，大于传统电子 IMC 方法的 1/3。为了实现改进后的电子 IMC，提出了改进后的电子 IMC 方法的驱动器定时图。本文提出了一种改进后的电子 IMC 方法的硬件实现方法。基于基本的 FTF4052M 驱动电路系统，添加了一个与主脉冲发生器（SAA8103）一起工作的 IMC 脉冲发生器，以实现改进后的电子 IMC。然后，给出了 IMC 脉冲发生器的内部结构。提出了一种双脉冲发生器驱动电路系统。经过计算机模拟和室内实际拍摄验证，改进后的电子 IMC 方法的补偿效果优于传统的电子 IMC 方法的补偿效果。
