针对常见的城市建筑物图像,提出了一种由单幅图像自动完成建筑物主体轮廓提取的算法。算法利用基于凸包彩色形态筛的多尺度性,设计了城市建筑物场景贝叶斯概率统计模型,由最大化后验概率(Maximum a pos-terior,MAP)估计消隐点在图像中...针对常见的城市建筑物图像,提出了一种由单幅图像自动完成建筑物主体轮廓提取的算法。算法利用基于凸包彩色形态筛的多尺度性,设计了城市建筑物场景贝叶斯概率统计模型,由最大化后验概率(Maximum a pos-terior,MAP)估计消隐点在图像中的投影,利用边缘像素分类的结果获得建筑物的主体轮廓。该算法可用于单幅图像,不需要边缘检测和Hough变换等处理。实验结果证明,通过估计该场景结构可以自动获得消隐点在图像中的投影,进而提取建筑物的平行六面体主体轮廓。展开更多
Based on the statics theory, a novel and feasible twice-suspended-mass method(TSMM) was proposed to deal with the seldom-studied issue of fault diagnosis for damping springs of large vibrating screen(LVS). With the st...Based on the statics theory, a novel and feasible twice-suspended-mass method(TSMM) was proposed to deal with the seldom-studied issue of fault diagnosis for damping springs of large vibrating screen(LVS). With the static balance characteristic of the screen body/surface as well as the deformation compatibility relation of springs considered, static model of the screen surface under a certain load was established to calculate compression deformation of each spring. Accuracy of the model was validated by both an experiment based on the suspended mass method and the properties of the 3D deformation space in a numerical simulation. Furthermore, by adopting the Taylor formula and the control variate method, quantitative relationship between the change of damping spring deformation and the change of spring stiffness, defined as the deformation sensitive coefficient(DSC), was derived mathematically, from which principle of the TSMM for spring fault diagnosis is clarified. In the end, an experiment was carried out and results show that the TSMM is applicable for diagnosing the fault of single spring in a LVS.展开更多
文摘针对常见的城市建筑物图像,提出了一种由单幅图像自动完成建筑物主体轮廓提取的算法。算法利用基于凸包彩色形态筛的多尺度性,设计了城市建筑物场景贝叶斯概率统计模型,由最大化后验概率(Maximum a pos-terior,MAP)估计消隐点在图像中的投影,利用边缘像素分类的结果获得建筑物的主体轮廓。该算法可用于单幅图像,不需要边缘检测和Hough变换等处理。实验结果证明,通过估计该场景结构可以自动获得消隐点在图像中的投影,进而提取建筑物的平行六面体主体轮廓。
基金Project(20120095110001)supported by the PhD Programs Foundation of Ministry of Education of ChinaProject(51134022,51221462)supported by the National Natural Science Foundation of China+1 种基金Project(CXZZ13_0927)supported by Research and Innovation Program for College Graduates of Jiangsu Province,ChinaProject(2013DXS03)supported by the Fundamental Research Funds for Central Universities of China
文摘Based on the statics theory, a novel and feasible twice-suspended-mass method(TSMM) was proposed to deal with the seldom-studied issue of fault diagnosis for damping springs of large vibrating screen(LVS). With the static balance characteristic of the screen body/surface as well as the deformation compatibility relation of springs considered, static model of the screen surface under a certain load was established to calculate compression deformation of each spring. Accuracy of the model was validated by both an experiment based on the suspended mass method and the properties of the 3D deformation space in a numerical simulation. Furthermore, by adopting the Taylor formula and the control variate method, quantitative relationship between the change of damping spring deformation and the change of spring stiffness, defined as the deformation sensitive coefficient(DSC), was derived mathematically, from which principle of the TSMM for spring fault diagnosis is clarified. In the end, an experiment was carried out and results show that the TSMM is applicable for diagnosing the fault of single spring in a LVS.
