基于光线投射法的目标三维重构技术

3-D Reconstruction Technique Based on Ray-Casting Arithmetic

针对距离选通激光成像系统获得的图像源,为了减小断层图像间的距离远大于断层图像内像素间的距离这一因素对三维可视化的影响,增强三维显示效果,提高运算速度,在研究了光线投射三维重构算法的基础上,提出了距离分辨率远小于成像分辨率的插空帧光线投射法和通过旋转体数据实现从不同的视线角度进行观察的三维重构方法。仿真结果表明:提出的方法可行、有效,提高了目标的探测和识别概率。

The images based on the gate-ranged laser imaging system are obtained. In order to minimize the impact that the distance between cross-section images is far than the distance between pixels in a cross-section image on 3-D visualization caused by that, enhance the 3-D displaying effect and improve the operation speed, a fill-in frame ray casting method and a 3- D displaying method with observing from different angles by rotating volume data are proposed based on the research of ray casting 3-D displaying method. The simulation results show that the proposed methods are effective and feasible, the 3-D vi- sualization and target identification probability are improved.