铁道科学与工程学报
鐵道科學與工程學報
철도과학여공정학보
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
2014年
3期
101-106
,共6页
祝志恒%阳军生%肖超%刘庆潭
祝誌恆%暘軍生%肖超%劉慶潭
축지항%양군생%초초%류경담
形函数变换%隧道病害展开图%隧道检测
形函數變換%隧道病害展開圖%隧道檢測
형함수변환%수도병해전개도%수도검측
shape functions transform%tunnel disease expansion plan%tunnel detection
通过透视变换和四边形八节点形函数变换2种平面变换方法即可建立影像像素与展平坐标系之间的关系,生成基于影像的展开图,提出一种基于形函数的隧道衬砌影像展平变换方法。通过数值模拟测试,得出展平照片的误差分布以及不同拍摄位置对误差的影响。最后通过案例给出方法实际应用的效果。结果表明:基于形函数变换的展平方法反需要衬砌表面照片及照片中8个控制点的展平坐标即能建立隧道影像与展开平面之间的坐标关系。该方法所产生的误差很小,具有较高的实用性。
通過透視變換和四邊形八節點形函數變換2種平麵變換方法即可建立影像像素與展平坐標繫之間的關繫,生成基于影像的展開圖,提齣一種基于形函數的隧道襯砌影像展平變換方法。通過數值模擬測試,得齣展平照片的誤差分佈以及不同拍攝位置對誤差的影響。最後通過案例給齣方法實際應用的效果。結果錶明:基于形函數變換的展平方法反需要襯砌錶麵照片及照片中8箇控製點的展平坐標即能建立隧道影像與展開平麵之間的坐標關繫。該方法所產生的誤差很小,具有較高的實用性。
통과투시변환화사변형팔절점형함수변환2충평면변환방법즉가건립영상상소여전평좌표계지간적관계,생성기우영상적전개도,제출일충기우형함수적수도츤체영상전평변환방법。통과수치모의측시,득출전평조편적오차분포이급불동박섭위치대오차적영향。최후통과안례급출방법실제응용적효과。결과표명:기우형함수변환적전평방법반수요츤체표면조편급조편중8개공제점적전평좌표즉능건립수도영상여전개평면지간적좌표관계。해방법소산생적오차흔소,구유교고적실용성。
An image transform method for flattening tunnel lining photo was proposed in this paper based on shape functions transform.It would be convenient to build tunnel lining expansion plan on the basis of flattened image, for it only use two plane transform methods i.e.,perspective transform and eight nodes shape functions trans-form.Feasibility of the method was validated through numerical simulation.Meanwhile,the errors distribution of flattened image and the influence of errors at different shot position were also obtained.Finally,examples were given to show the effect of the method utilized the in practical application.The results show that,based on flat-tening of shape functions transform,the coordinate relationship between tunnel photos and the flattening plane can be established with tunnel lining surface photo and flattening coordinates of eight control points of photo.The error of this method is small,which shows good practicality.