摘要
手术导航中术中工作的重要工作是对双目摄像机拍摄到的图像进行立体匹配,从而确定手术器械的空间位置。因此,研究高精度的定位算法具有很重要的意义。本文采用主动式光学定位器,给出了3种立体匹配的算法。从匹配精度、匹配时间以及算法的实现难度上比较了各种算法的优劣。对基于特征标记点的空间位置的匹配算法进行改进,提高了标记点质心坐标的精度,并且用该算法来实现手术导航定位系统术中三维定位的功能。最后分析了影响系统定位精度的原因。
The important task of surgical navigation is the stereo matching of the two pictures photographed by the Binocular Camera and the locating of the surgical instruments in the realworld.Therefore,it is of great significance to do the researching of the high-precision locating algorithm.This paper chose the active optical locator as the surgical instrument,showed three kinds of Stereo matching algorithms.The merits and shortcomings of various algorithms were compared from matching accuracy,time-consuming of the matching process as well as the complexity of the algorithm.The Algorithm based on Spatial location of the markers was improved to increase the accuracy of the coordinates of the centroid of markers.The Algorithm based on Spatial location of the markers was used to achieve the three-dimensional function of the surgical navigation system.Finally,the paper analyses the causes affecting the accuracy of the locating system.
出处
《现代科学仪器》
2012年第1期63-67,共5页
Modern Scientific Instruments
关键词
手术导航
主动式定位器
立体匹配
图像分割
极线校正
Surgical Navigation
Active locator
Stereo Matching
Image Segmentation
Epipolar line rectification
