LED脉冲光源分时复用的光场相机成像技术研究

Study on imaging technology of light field camera based on time division multiplexing of pulsed light source

针对静爆场景深空间较大,破片速度快、尺寸小、分布范围大,传统成像法景深范围小,光场相机成像幅率低的问题,提出了一种在光场相机的单次曝光时间内,利用三基色高功率窄脉冲LED光源分时复用主动照明方法。后期通过MATLAB对所得图像进行处理,根据通道分量将图像解析为3幅不同时刻单色图像。搭建了测试平台,对运动的目标物进行了拍摄并处理,结果表明:光场成像幅率提高了3倍,解决了现有的设备成像幅率较低的技术问题。

For static explosion scenes,the deep space is large,the fragmentation speed is fast,the size is small,and the distribution range is large,while the traditional imaging method has a small depth of field,and light field camera has low imaging rate.This paper proposed a time-division multiplexing active lighting method,during a single exposure time of light field camera,three-primary-color high-power narrow-pulse LED was used for time-sharing illumination.In the later stage,the obtained image was processed by MATLAB,and according to the channel component,the image was parsed into 3 monochrome images at different moments.A test platform was built,and the moving target was photographed and processed.The result shows that the light field imaging rate was increased by 3 times,and it solves the technical problem of the low rate of existing equipment.