1) Preservatio n of Cross Ration
保交比性
2) equianharmonic cross ratio feature
等交比性
3) preserving orthogonality
保正交性
4) cross ratio invariability
交比不变性
1.
Research on calibration of cameras based on cross ratio invariability;
基于交比不变性的相机镜头畸变标定研究
2.
Firstly,order radial lens distortion parameters are computed by using cross ratio invariability.
该方法利用透视投影的交比不变性原理标定镜头的畸变系数,基于摄像机成像的单应性矩阵及内部参数的基本约束,线性标定出其他摄像机参数。
5) equality of cross ratio
交比不变性
1.
In the first method,the camera was first calibrated use the equality of cross ratio,then put the measured object and calibration object on the same plane,put the camera perpendicular to the calibration plane as far as possible,finally 3D reconstruction was transformed to 2D reconstruction,then the calculate becomes simple.
讨论并实现了两种单幅图像测量的方法,方法1是先根据交比不变性进行标定,然后将被测物和标定物放于同一平面上,并且摄像机尽量垂直与标定平面,即可将三维重建转变为二维重建,计算简单;方法2是利用了平面单应性矩阵,先获得标定平面的单应矩阵,然后根据垂直关系获得测量平面的单应矩阵,进而获得测量结果,实验装置简单。
2.
Under the case of first-order radial distortion,the equality of cross ratio in the perspective projection was used to calculate the first-order radial distortion ratio in order to calibrate the camera,then the extending rate of the steel bar can be calculated.
研究了利用图像进行钢筋延伸率测量的方法,即在畸变模型为一阶径向畸变的情况下,利用透视投影中的交比不变性质来计算一阶径向畸变参数,进行线性的系统标定,进而实现对钢筋延伸率的测量。
补充资料：交比
见射影几何学。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条