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畸变中心
相关语句
  distortion center
     An easy and fast method of lens distortion correction by mathematical model of camera on the basis of projective theory is proposed, in which radial distortion center and distortion coefficient were considered.
     对于助降用摄像机镜头畸变严重的情况,提出了一种快速有效的校正方法,本方法利用摄影几何学中的交叉比不变性校正畸变中心并采用共线性原理标定畸变系数。
短句来源
     A camera calibration method with co-line points is proposed,in which distortion center is located according to cross ratio invariability,and then distortion coefficients are calculated based on a line's central projection is a line.
     提出一种用共线点列标定摄像机镜头畸变参数的方法,先根据交叉比不变性确定畸变中心,再利用直线的中心投影仍为直线这一性质确定畸变系数。
短句来源
     The emulation indicates that only if some measures are adopted to decrease the projection points' coordinate error,error of the distortion center would be less than 2 pixels and relative error of the distortion coefficients would be no more than 0.1.The experiment shows that these distortion parameters gained with the proposed method are good at a correcting distortion image.
     仿真表明,只要采用相应方法降低像点坐标的误差,畸变中心的误差小于2个像素,畸变系数的相对误差不超过0.1。 实验表明,用该方法得到的畸变参数,能够很好地校正图像。
短句来源
     And the effect of the image distortion center bias and scale factor ratio offset on image correction quality is discussed.
     并对图像的畸变中心和纵横比例因子对校正的影响做了探讨。
短句来源
  “畸变中心”译为未确定词的双语例句
     It turns out that the unit torsional warping and unit distorsional warping as well as the center of twist and center of distortion of such curved girder are different from those of the straight girder, namely, they contain supplementary terms caused by the initial curvature.
     结果表明,对于约束扭转和截面畸变,大曲率梁的单位扭翘和单位畸翘以及扭转中心和畸变中心都与直梁的不同,即增加由梁轴初始曲率产生的修正项;
短句来源
     The effect of bend-ing, torsion、and distortion centres and the warping zero point are considered. Having compared with htemeasured results of the model experiments, the accuracy of the proposed method is demonstrated.
     考虑到截面畸变中心、扭转中心,弯曲中心及翅曲零点的影响,并结合料交箱梁有机玻璃模型的实验,对该方法的可靠性及适用范围作出了评价,同时还对该方法编制了计算机程序SBCP—1,可在小型IBM计算机上完成。
短句来源
     Then the radial coordinates of the distorted and ideal feature points are calculated under the hypothesis of given center of distortion, and the relation function between the ideal and distorted radial coordinates is obtained by solving linear equations or by polynomial fitting.
     然后以不同的畸变中心假设 ,计算畸变和理想特征点的矢径坐标 ,并通过解线性方程组或多项式拟合求出它们之间的函数关系 ;
短句来源
  相似匹配句对
     Where T(R) is the hypercenter of R; Z(R) is the center of R.
     Z(R)是R的中心
短句来源
     A NEW METHOD OF THE CENTRAL EXTENSION ROF Q-DEFORMED VIRASORO ALGEBRA
     q—畸变Virasoro代数中心扩张的新途径
短句来源
     A NEW METHOD OF THE CENTRAL EXTENSION ROF Q—DEFORMED VIRASORO ALGEBRA
     q—畸变Virasoro代数中心扩张的新途径
短句来源
     Harbor Center
     港湾中心
短句来源
     (3)it cauces chromosome aberration;
     导致染色体畸变
短句来源
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  distortion center
Lens distortion parameters, especially the lens distortion center, can be precisely recovered with this approach.
      
Both the expansion coefficients up to 3rd order and the distortion center have been estimated.
      
However, closed-form solutions for rest of the distortion parameters can be obtained if a good estimate of the distortion center is known.
      
The left image shows pattern point and distortion center trajectories after several iterations.
      


In this paper the torsion and bending of thin-walled box girders of deformable cross-section with a great initial curvature——the ratio of the radius R_0 of the curved girder axis to the girder width B is less than 10,R_0/B<10——are dealt with. Using the approximation that the initial curvature varies linearly along the girder width B, the normal stresses σ are analysed and the elastic equilibrrum differential equations of torsion and bending are established. It turns out that the unit torsional warping and unit...

In this paper the torsion and bending of thin-walled box girders of deformable cross-section with a great initial curvature——the ratio of the radius R_0 of the curved girder axis to the girder width B is less than 10,R_0/B<10——are dealt with. Using the approximation that the initial curvature varies linearly along the girder width B, the normal stresses σ are analysed and the elastic equilibrrum differential equations of torsion and bending are established. It turns out that the unit torsional warping and unit distorsional warping as well as the center of twist and center of distortion of such curved girder are different from those of the straight girder, namely, they contain supplementary terms caused by the initial curvature. Moreover, the neutral axis of the bending in the curvature plane deviates from the principal axis of the cross-section. From the theory presented, the numerical solutions were obtained by means of beam finite element method and the results were checked by model tests.

本文以截面可变形的曲线薄壁梯形箱粱为对象,针对梁轴初始曲率半径R_o与梁宽B的比例R_o/B<10的大曲率情况,近似取曲率沿梁宽变化为线性函数,演引扭转和弯曲的理论——法向应力分析和弹性平衡微分方程。结果表明,对于约束扭转和截面畸变,大曲率梁的单位扭翘和单位畸翘以及扭转中心和畸变中心都与直梁的不同,即增加由梁轴初始曲率产生的修正项;在曲线平面的弯曲中,中和轴也偏离截面主轴。按照本理论已用梁有限元法求得数值解,结果还用模型试验作了检验。

A finite segmental transformation method is presented in this paper. The effect of bend-ing, torsion、and distortion centres and the warping zero point are considered. Having compared with htemeasured results of the model experiments, the accuracy of the proposed method is demonstrated.

本文采用有限分段变换法对斜交薄壁箱梁进行了空间受力分析。考虑到截面畸变中心、扭转中心,弯曲中心及翅曲零点的影响,并结合料交箱梁有机玻璃模型的实验,对该方法的可靠性及适用范围作出了评价,同时还对该方法编制了计算机程序SBCP—1,可在小型IBM计算机上完成。

To implement accurate metric measurement within a large field of view with common off the shelf cameras, the image distortion caused by wide angle lenses should be corrected. A simple and precise method for calibrating the radial distortion is proposed. Any planar pattern in which the feature points form a grid can be used to obtain the calibration image. The proposed method first constructs an ideal image based on the positions of feature points extracted from the distorted image. Then the radial coordinates...

To implement accurate metric measurement within a large field of view with common off the shelf cameras, the image distortion caused by wide angle lenses should be corrected. A simple and precise method for calibrating the radial distortion is proposed. Any planar pattern in which the feature points form a grid can be used to obtain the calibration image. The proposed method first constructs an ideal image based on the positions of feature points extracted from the distorted image. Then the radial coordinates of the distorted and ideal feature points are calculated under the hypothesis of given center of distortion, and the relation function between the ideal and distorted radial coordinates is obtained by solving linear equations or by polynomial fitting. The set of parameters with the minimum mean square error is regarded as the calibration result. One merit of the proposed method is that both the undistorted to distorted and distorted to undistorted expression can be obtained at the same time by the same way. Moreover, the inverse power proportion relation between calibration result and resolution of rectified image is derived, and the influence of the order of distortion function on rectified image is discussed. Experiment results show that 4th or 5th order function would result better outcome.

为了用普通低成本的广角镜头摄像机实现较大视场的精确定量的图像测量 ,必须对畸变图像进行校正。提出了一种简单而精确的径向畸变标定方法 ,该方法使用栅格阵列标定模板。首先根据畸变图像中特征点之间的相互位置关系构造出理想图像中的特征点位置 ;然后以不同的畸变中心假设 ,计算畸变和理想特征点的矢径坐标 ,并通过解线性方程组或多项式拟合求出它们之间的函数关系 ;最后取矢径均方误差最小的参数组作为标定结果。该法可同时获得畸变变换和矫正变换的参数。文中还推导了畸变变换多项式系数与校正图像分辨率之间的反幂比例关系 ,讨论了畸变函数的阶对校正结果的影响 ,实验结果表明 ,取 4阶或 5阶多项式拟合的结果较好

 
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