针对光切法测量受太阳光照、被测物体表面纹理信息、被测表面低反射特性等干扰因素的影响,很难准确地提取激光光带信息的问题,提出了一种有效消除这些因素的方法。控制激光光源,连续采集两幅图像,保证其中只有一幅图像包含激光光带信息;然后进行背景运动补偿,使两幅图像只在激光照到的位置处稍有不同;将两幅图像相减,使激光光带信息突出;最后,对光带数据进行细化、修补,获得完整的光刀中心轮廓线。实验结果表明,所提出的方法有效地消除了上述3种干扰因素的影响,非常适合于现场运动工件的表面形貌测量。

In the light-sectioning method,it is difficult to accurately extract light-knife center contour due to those influences such as sun light,surface texture information and the low reflection of measured object,So an effective solution to eliminate those influences is presented.By controlling the laser,two consecutive images in which only one image contains laser information are acquired.Then,the background motion compensation is processed to make the two images have slightly difference only in the laser location,thereby the laser trace is emerged after image subtraction.Finally,a complete light-knife center contour is obtained through refinement and repair for data.The experimental results show that proposed method is effective to eliminate the influences mentioned above and it is adapted for measuring 3D shape of the mobile objects in a measuring locale.