基于视频的结构光光条中心提取方法  

Video-Based Method for Extracting the Center of Structured Light Stripe

作　　者：陈亮[1] 王永强[1] 许增朴[1] 于德敏[1] 

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《天津科技大学学报》2009年第4期62-65,共4页Journal of Tianjin University of Science & Technology

摘　　要：针对结构光测量系统,提出基于视频的结构光光条中心提取方法.首先,为了分析图像随时间变化的关系,将视频图像的每一帧的同一列像素提取出来,按照时间顺序排列成一幅图像.然后,把图像逆时针旋转θ角度(θ角是激光平面和CCD传感器平面法线的夹角),提取光条中心图像坐标.最后,把求得的光条中心图像坐标顺时针旋转θ角,根据这个光条中心坐标反求物体的三维轮廓.该方法利用视频图像各帧之间的相关性,有效地克服了颜色突变对光条提取的影响.实验表明,该方法能够有效降低光条中心提取的误差.For structured light measurement system ,video-based light stripes center extraction method was proposed. First, in order to analyze the relationship between images and time change over ,the video image of each frame of the same row of pixels were extracted,then arranged an image in accordance with chronological order. Second,images were rotated Odegrees counterclockwise （0 angle is the normal angle between laser plane and CCD sensor plane）to extract image coordinates of light stripes center. Finally,the obtained light stripes center image coordinates were rotated 0 degrees clockwise,and then three-dimensional contours of objects were acquired according to this light stripes center coordinates. This method can effectively overcome the color mutations effects on light stripes extraction by using video images of the correlation between frames. Experiments show that the method can effectively reduce the extraction error of light stripes center.

关 键 词：三维测量 结构光 视频 光条中心 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]