CMOS图像传感器中卷帘式快门特性及其应用技术研究

为了研究CMOS图像传感器卷帘式快门的具体应用，结合具体的CMOS图像传感器进行研究。首先，本文介绍了卷帘式快门的特点和工作原理，对具有卷帘式快门的CMOS图像传感器成像特性进行了分析，并对采用卷帘式快门工作方式的CMOS图像传感器进行了成像实验研究。其次，本文还对一种利用卷帘式快门相机拍摄的单精度视图来计算高速物体在三维空间中的位移和速度的新方法进行了探讨，最后，提出了建立一个运动目标的透视投影模型，讨论了估计目标位姿和速度的方法。实验结果表明，具有卷帘式快门的CMOS图像传感器对运动物体成像时会产生一定程度的畸变，畸变的程度与积分时间等传感器参数的设置有关。经过实验可以在误差最小化的情况下得到运动物体的位姿和速度参数，经过计算误差在2.5%以内。对实验结果的分析已经证明了其可行性。这种计算方法能够使得低价格，低耗能的CMOS相机转化为一种新的速度传感器。

Research on Properties and Application Technology of CMOS Image Sensor with Rolling Shutter

In order to research the specific applications of CMOS image sensor rolling shutter ,this paper research with specific CMOS image sensor. First, this paper introduces the principle and characteristics of global shutter and rolling shutter of the CMOS imager, it analyzes the impact of rolling shutter on measurement precision of the imaging system based on CMOS imager .Imaging experiment is taken to test the analyses of the rolling shutter. Then, an original method for computing instantaneous 3D pose and velocity of fast moving objects using a single view is presented. It exploits image deformations induced by rolling shutter in CMOS image sensors. Finally, a general perspective projection model of a moving 3D point is presented. A solution for the pose and velocity recovery problem is then described. Results indicate that some aberrations appears in faith, and the aberration degree has close relations with some parameters of CMOS imager like integration. After experiments can minimize error in the case of moving objects by the pose and speed parameters, the calculation error is under 2.5 percent. Experimental results with real data confirm the relevance of the approach. The resulting algorithm enables to transform a CMOS low cost and low power camera into an original velocity sensor.