摘要
距离选通激光主动成像技术进行三维成像的方法之一是通过延迟时间步进变化获得不同距离切片序列图像,通过处理序列二维图像获取目标点的三维信息,其关键是数据处理方法。在分析应用延时步进方法进行距离选通三维成像基本理论的基础上,针对系统激光脉宽、ICCD快门时间、延时步进等参数值较大时获得的灰度值序列特征,提出一种改变参与计算的图像帧数的目标距离计算改进方法,实验结果表明:该方法在减小运算量的同时可有效提高三维成像的距离精度。
One of the 3D imaging methods based on range-gated laser active imaging technology is time- slice technology. The range-gated laser active imaging system acquired 2D serial time-slice images of target by changing delay time in step, and calculated the target 3D information from the acquired 2D serial images. The calculation method for range of the target points was the key point. After analyzing the basic theory of range-gated 3D imaging by time-slice technology, an ameliorative range calculation method was brought forward by changing the frame number of images participant in calculation flow, and it need not calculate all the serial 2D images. It aimed at the serial 2D images acquired by imaging system with comparatively longer laser pulse width, ICCD shutter, and delay time step. The long range laser active imaging experiment result shows that this method can improve the 3D image range precision and reduce the computation time.
出处
《红外与激光工程》
EI
CSCD
北大核心
2012年第12期3258-3262,共5页
Infrared and Laser Engineering
