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三维视觉测量    
相关语句
  3 d vision measurement
    Mobile 3D vision measurement system for large-scale free form surface
    大型自由曲面移动式三维视觉测量系统
短句来源
    Optical probe based on infrared LED, used as the object of imaging of the large-space 3D vision measurement system, is also one of key factors that affect the accuracy of the system.
    基于红外LED的光学测棒是大空间三维视觉测量系统的成像目标,也是影响系统测量精度的关键因素之一。
短句来源
    A mobile 3D vision measurement system for large-scale free form surface is introduced.
    本文介绍了一种移动式三维视觉测量系统,用于大型物体自由曲面的测量。
短句来源
    The perspective projection model of theodolite is established, and a 3D data registration method which takes a planar target as intermediary coordinate frame and single theodolite as global coordinate frame is proposed for the problem of data registration in 3D vision measurement for large free surface.
    本文针对大型自由曲面三维视觉测量中的数据拼接问题,建立了经纬仪透视投影模型,提出了以平面靶标为中介坐标系,以经纬仪坐标系为全局坐标系的三维数据拼接方法。
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A mobile 3D vision measurement system for large-scale free form surface is introduced.The sensor of the system adopts binocular stereo vision principle combined with coded structured light technology,which simplifies the process of finding correspondence.The sensor is moved around a large-scale object,and each local surface is measured.Using a planar target as intermedium,an optimized object function of the position and orientation transformation matrix of the sensor is established;and the matrix,namely registration...

A mobile 3D vision measurement system for large-scale free form surface is introduced.The sensor of the system adopts binocular stereo vision principle combined with coded structured light technology,which simplifies the process of finding correspondence.The sensor is moved around a large-scale object,and each local surface is measured.Using a planar target as intermedium,an optimized object function of the position and orientation transformation matrix of the sensor is established;and the matrix,namely registration matrix,is derived from the feature points on the planar target.The 3D data obtained at the local locations are unified in the global coordinate frame using the registration matrix.This measurement system was used to measure a Venus plaster model at two local locations,and the 3D data were registered.The experimental results show that the measurement system features simple operation and wide application fields;the registration RMS errors for x,y and z coordinates are 0.038 mm,0.022 mm and 0.135 mm respectively.

本文介绍了一种移动式三维视觉测量系统,用于大型物体自由曲面的测量。传感器采用双目立体视觉方式,并结合编码结构光技术,使匹配过程简化。传感器移动到大型物体周围对各局部区域进行测量。采用一个平面靶标作为中介,建立了传感器位姿变换矩阵的优化目标函数,根据靶标上多个特征点求解出该矩阵,即拼接矩阵。传感器在各个位置所测三维数据通过拼接矩阵统一到全局坐标系下。视觉测量系统在2个位置对维纳斯石膏像进行了测量,并进行拼接。结果表明,该测量系统操作简单,适用范围广;x、y、z坐标拼接RMS误差分别为0.038 mm0、.022 mm和0.135 mm。

The perspective projection model of theodolite is established, and a 3D data registration method which takes a planar target as intermediary coordinate frame and single theodolite as global coordinate frame is proposed for the problem of data registration in 3D vision measurement for large free surface. The planar target is placed near sub-areas of a large free-form surface, and the transformation matrix from the sensor coordinate frame to the target coordinate frame is estimated by taking image of feature points...

The perspective projection model of theodolite is established, and a 3D data registration method which takes a planar target as intermediary coordinate frame and single theodolite as global coordinate frame is proposed for the problem of data registration in 3D vision measurement for large free surface. The planar target is placed near sub-areas of a large free-form surface, and the transformation matrix from the sensor coordinate frame to the target coordinate frame is estimated by taking image of feature points on the planar target using the vision sensor; the transformation matrix from the target coordinate frame to the theodolite coordinate frame is estimated by observing the feature points using the theodolite. The transformation matrix from the sensor coordinate frame to the theodolite coordinate frame is then found. All the 3D data of sub-areas obtained by the vision sensor are unified in the theodolite coordinate frame, and the global measurement for a large object is accomplished. The experimental results show that the RMS error of 3D data registration is less than 0.487 mm.

本文针对大型自由曲面三维视觉测量中的数据拼接问题,建立了经纬仪透视投影模型,提出了以平面靶标为中介坐标系,以经纬仪坐标系为全局坐标系的三维数据拼接方法。在大型自由曲面的若干测量子区域附近放置一个平面靶标,通过视觉传感器拍摄平面靶标上的特征点,求得视觉传感器坐标系到靶标坐标系的变换矩阵;通过经纬仪观测靶标上的特征点,求得靶标坐标系到经纬仪坐标系的变换矩阵。因此,可求得视觉传感器坐标系到经纬仪坐标系的变换矩阵。将视觉传感器所测得的各子区域的三维数据统一到了经纬仪坐标系下,即完成了大型自由曲面的全局测量。经实验验证,数据拼接的RMS误差小于0.487mm。

 
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