tangent projection

It makes the Tangent Sphere Method more simple by the coincidence of the horizontal plane of projection in counter-revolution with the vertical plane of projection.

在球络法作旋转曲面的阴影中，则为使水平投影H的反旋转与直立投影面v相重合，因而更简化了这种球络法。

Chapter three studies the problem of interferometric phase images filtering and estimation, and details spin filtering with curve windows along the fringe tangent orientation and an estimation method based on the technique of joint space-image subspace projection.

第三章研究了干涉相位的滤波和估计问题，重点研究了曲线窗口旋滤波算法和子空间正交投影法。

This thesis proposes a method based on Moving Least-Squares to generate the fringe tangent orientation and gives an improving joint space-image subspace projection method with curve windows along the fringe tangent orientation through the combination of the fringe tangent orientation and the estimation method.

提出采用移动最小二乘法拟合条纹方向图，并将条纹方向图与正交投影法相结合，得出改进的沿条纹方向的正交投影估计方法。

The existing algorithms include equivalent left and right curve angle by definition, normal section line method and tangent projection etc. But all their precisions are limit to one-order truncation error, and make severe accumulate error on discrete models.

有关的算法有根据定义的左右曲面角相等，法截面法和切向投影等。这些方法的精度都局限在一阶截断误差，在离散的网格上有严重的累积误差。

All satellite image are tangent plane projection obtained along the flight direction of satellite.

卫星图像都是沿卫星飞行方向而获取的切平面投影图像。