基于单个圆形与一组平行线的平面度量恢复  

Plane Rectification Using Circle and A Set of Parallel Lines

作　　者：王自然 WANG Zi-ran （Nanjing Normal University Taizhou College, Taizhou 225300, China）

机构地区：南京师范大学泰州学院,江苏泰州225300

出　　处：《电脑知识与技术》2015年第11期207-209,共3页Computer Knowledge and Technology

基　　金：泰州市科技支撑（社发）计划项目（TS036）

摘　　要：针对包含已知直径的单个圆形与一组平行线平面的场景,利用灭点和直径的对极关系,计算平面的一个灭点,然后根据另外一组平行线计算另外一个灭点,进而获得平面灭线,然后根据圆形的各项同性性质,求解图像与现实之间的对应矩阵,进而实现对平面的度量矫正。A method for plane rectification from a scene with a circle and a set of parallel lines is proposed. Rectification homog- raphy can be used to back-project the ellipse in the image to a circle. Firstly, a vanishing point can be determined from a set of parallel lines. Another vanishing point is estimated by the relationship between diameter and vanishing point. Consequently the vanishing line is determined by the two vanishing points. After that the homography can be obtained from the vanishing line and the image of the circle. Once the homography is determined the image of the circle is back-projected to an ellipse. Based on the homography the plane can be rectified. If there is a known length of a line segment in the image, other geometric information al- so can be computed. Experimental results demonstrate the approach＇ s efficacy.

关 键 词：圆形 灭点 灭线 度量恢复 

分 类 号：TP391[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]