projective_trans_hom_point_3dT_projective_trans_hom_point_3dProjectiveTransHomPoint3dProjectiveTransHomPoint3dprojective_trans_hom_point_3d (算子)

名称

projective_trans_hom_point_3dT_projective_trans_hom_point_3dProjectiveTransHomPoint3dProjectiveTransHomPoint3dprojective_trans_hom_point_3d — 使用投影变换矩阵投影齐次三维点。

签名

描述

projective_trans_hom_point_3dprojective_trans_hom_point_3dProjectiveTransHomPoint3dProjectiveTransHomPoint3dProjectiveTransHomPoint3dprojective_trans_hom_point_3d applies the homogeneous projective transformation matrix HomMat3DHomMat3DHomMat3DHomMat3DhomMat3Dhom_mat_3d to all homogeneous input points (PxPxPxPxpxpx,PyPyPyPypypy,PzPzPzPzpzpz,PwPwPwPwpwpw) and returns an array of homogeneous output points (QxQxQxQxqxqx,QyQyQyQyqyqy,QzQzQzQzqzqz,QwQwQwQwqwqw). The transformation is described by the homogeneous transformation matrix given in HomMat3DHomMat3DHomMat3DHomMat3DhomMat3Dhom_mat_3d. This corresponds to the following equation (input and output points as homogeneous vectors):

To transform the homogeneous coordinates to Euclidean coordinates, they must be divided by QwQwQwQwqwqw: This can be achieved directly by calling projective_trans_point_3dprojective_trans_point_3dProjectiveTransPoint3dProjectiveTransPoint3dProjectiveTransPoint3dprojective_trans_point_3d。Thus, projective_trans_hom_point_3dprojective_trans_hom_point_3dProjectiveTransHomPoint3dProjectiveTransHomPoint3dProjectiveTransHomPoint3dprojective_trans_hom_point_3d is primarily useful for transforming points or point sets for which the resulting points might lie in the plane at infinity, i.e., points that potentially have QwQwQwQwqwqw = 0, for which the above division cannot be performed.

执行信息

• 多线程类型：可重入（与非独占算子并行运行）。
• 多线程作用域：全局（可从任何线程调用）。
• 在内部数据级别上自动并行化。

参数

可能的前趋

vector_to_hom_mat3dvector_to_hom_mat3dVectorToHomMat3dVectorToHomMat3dVectorToHomMat3dvector_to_hom_mat3d

替代

projective_trans_point_3dprojective_trans_point_3dProjectiveTransPoint3dProjectiveTransPoint3dProjectiveTransPoint3dprojective_trans_point_3d

模块

基础

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