CAJ | 학술논문

物体受外力作用时因发生位移变形而导致结构损坏。针对该问题，以双目视觉原理建立物体三维数学模型，研究相机标定和特征提取，完成特征匹配，恢复标识点三维几何信息，得到物体位移。由于传统的相机标定法在常规尺寸应用中精度较高，一旦超出视场范围其测量精度迅速降低，不适于大视场测量，因此引入一种针对大视场测量的非参数相机标定法，并建立基于非参数的成像模型。通过在不同环境下分别对2种标定方法进行精度对比实验，结果表明，非参数相机标定法比传统的参数相机标定法精度提高约72.5%，且稳定性好，可满足物体位移测量的需求。
물체수외력작용시인발생위이변형이도치결구손배。침대해문제，이쌍목시각원리건립물체삼유수학모형，연구상궤표정화특정제취，완성특정필배，회복표식점삼유궤하신식，득도물체위이。유우전통적상궤표정법재상규척촌응용중정도교고，일단초출시장범위기측량정도신속강저，불괄우대시장측량，인차인입일충침대대시장측량적비삼수상궤표정법，병건립기우비삼수적성상모형。통과재불동배경하분별대2충표정방법진행정도대비실험，결과표명，비삼수상궤표정법비전통적삼수상궤표정법정도제고약72.5%，차은정성호，가만족물체위이측량적수구。
The object under the action of external force tends to have structural damage due to its displacement and deformation. To handle the problem,the three-dimensional mathematic model of pipe must be established with binocular vision principle. By studying camera calibration and feature extraction,matching the feature and restoring 3D geometric information of the marking point,displacement of the object can be obtained. Due to the traditional camera calibration method is high-precision in conventional applications, once beyond the field range, its measurement accuracy decreases rapidly,so it is not suitable for field measurement of the project. This paper introduces a method about nonparametric camera calibration for field measurement,and establishes the imaging model based on the new method. By conducting accuracy comparison experiments according to the calibration method in different environments,and the test results show that,precision of nonparametric camera calibration is approximately 72. 5% higher than the traditional method,as well as good stability,which can meet the measurement requirements of displacement.