桌面式三维激光扫描系统

Desktop three-dimensional laserscanner system

为降低家用级三维扫描设备成本和提高激光扫描效率,系统采用了线性激光器作为光源投射至物体表面,在物体随电动转台旋转一周的过程中,通过低端CMOS图像采集器进行连续信息采集,在CMOS尺寸和焦距不确定或有误差情况下,通过实测相关参数并设计新的算法实现了在短时间内对测量对象的近距离、高精度激光测距。采集到的信息传送到上位机通过二值化算法、降噪算法、中心提取算法和坐标变换算法进行处理,建立了物体的三维模型,利用三维激光扫描系统对一塑料人物模型进行了建模实验,结果表明人物的结构和具体的细节能够得到良好展现,精度能够达到0.05mm。系统结构简单、成本低、扫描精度高,为三维扫描系统的研究提供了参考,有利于三维逆向建模技术的推广。

In order to improve the scanning efficiency and reduce the cost of household 3D scanning equipment,using a Linear laser diode as the light resource casting onto surface of the object,which spins together with the electrical turntable. At the same time,a low-end digital camera continuously gathers light information reflecting from the object,to resolve the problem of camera CMOS size and focal uncertainty or error,a new algorithm was designed to obtain better measurement results by some measured parameters. The light information was processed by de-noise,center extraction and ordinate conversion algorithms,realizing the purpose of reconstructing 3D model with high precision. A model experiment was carried out on a plastic figure model using 3D laser scanning system,the results showed that the structural characteristics and specific details can be displayed well,where the precision can reach 0. 05 mm. Compared with other systems,it has advantages of relatively lower cost,higher precision and simple structure. Additionally,it also provides a reference for the research of 3D scanning systems,which is conducive to the promotion of 3D reverse modeling technology.