Inoue Michiaki, Gu Qingyi, Jiang Mingjun, Takaki Takeshi, Ishii Idaku, Tajima Kenji
Department of System Cybernetics, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
Institute of Automation, Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing 100190, China.
Sensors (Basel). 2017 Oct 29;17(11):2483. doi: 10.3390/s17112483.
This study proposes a novel concept of actuator-driven frame-by-frame intermittent tracking for motion-blur-free video shooting of fast-moving objects. The camera frame and shutter timings are controlled for motion blur reduction in synchronization with a free-vibration-type actuator vibrating with a large amplitude at hundreds of hertz so that motion blur can be significantly reduced in free-viewpoint high-frame-rate video shooting for fast-moving objects by deriving the maximum performance of the actuator. We develop a prototype of a motion-blur-free video shooting system by implementing our frame-by-frame intermittent tracking algorithm on a high-speed video camera system with a resonant mirror vibrating at 750 Hz. It can capture 1024 × 1024 images of fast-moving objects at 750 fps with an exposure time of 0.33 ms without motion blur. Several experimental results for fast-moving objects verify that our proposed method can reduce image degradation from motion blur without decreasing the camera exposure time.
本研究提出了一种新颖的概念，即采用 actuator 驱动的逐帧间歇跟踪技术，用于对快速移动物体进行无运动模糊的视频拍摄。通过与以数百赫兹的频率大幅振动的自由振动型 actuator 同步控制相机帧和快门定时，以减少运动模糊，从而在自由视角高帧率视频拍摄中，通过发挥 actuator 的最大性能，显著减少快速移动物体的运动模糊。我们通过在一个配备以 750 Hz 振动的共振镜的高速摄像机系统上实现逐帧间歇跟踪算法，开发了一个无运动模糊视频拍摄系统的原型。它能够在曝光时间为 0.33 ms 的情况下，以 750 fps 的帧率捕捉 1024×1024 的快速移动物体图像，且无运动模糊。针对快速移动物体的多个实验结果验证了我们提出的方法能够在不降低相机曝光时间的情况下减少运动模糊导致的图像退化。
