register_object_model_3d_pairT_register_object_model_3d_pairRegisterObjectModel3dPairRegisterObjectModel3dPairregister_object_model_3d_pair (算子名称)

名称

register_object_model_3d_pairT_register_object_model_3d_pairRegisterObjectModel3dPairRegisterObjectModel3dPairregister_object_model_3d_pair — Search for a transformation between two 3D object models.

参数签名

描述

register_object_model_3d_pairregister_object_model_3d_pairRegisterObjectModel3dPairRegisterObjectModel3dPairRegisterObjectModel3dPairregister_object_model_3d_pair searches for a transformation between two 3D object models having an optimal alignment. This process is called registration. The transformation that is returned in PosePosePosePoseposepose can be used to transform ObjectModel3D1ObjectModel3D1ObjectModel3D1ObjectModel3D1objectModel3D1object_model_3d1 to the reference frame of the second object ObjectModel3D2ObjectModel3D2ObjectModel3D2ObjectModel3D2objectModel3D2object_model_3d2. ScoreScoreScoreScorescorescore returns the ratio of the overlapping parts to the not overlapping parts of the two 3D object models. If the two objects are not overlapping, no pose is returned. The parameter MethodMethodMethodMethodmethodmethod decides if the initial relative position is calculated by 'matching'"matching""matching""matching""matching""matching" or if only the pose refinement is performed in relation to the then assumed common global reference frame, which can be selected directly with 'icp'"icp""icp""icp""icp""icp".

The accuracy of the returned pose is limited to around 0.1% of the size of the point clouds due to numerical reasons. The accuracy further depends on the noise of the data points, the number of data points and the shape of the point clouds.

The matching process and the following refinement can be controlled using the following name-value pairs in GenParamNameGenParamNameGenParamNameGenParamNamegenParamNamegen_param_name and GenParamValueGenParamValueGenParamValueGenParamValuegenParamValuegen_param_value:

'default_parameters'"default_parameters""default_parameters""default_parameters""default_parameters""default_parameters":

To allow an easy control over the parameters, three different sets of parameters are available. Selecting the 'fast'"fast""fast""fast""fast""fast" parameter set allows a shorter calculation time. 'accurate'"accurate""accurate""accurate""accurate""accurate" will give more accurate results. 'robust'"robust""robust""robust""robust""robust" additionally improves the quality of the resulting ScoreScoreScoreScorescorescore at the cost of calculation time.

List of values: 'fast'"fast""fast""fast""fast""fast", 'accurate'"accurate""accurate""accurate""accurate""accurate", 'robust'"robust""robust""robust""robust""robust".

Default: 'accurate'"accurate""accurate""accurate""accurate""accurate".

'rel_sampling_distance'"rel_sampling_distance""rel_sampling_distance""rel_sampling_distance""rel_sampling_distance""rel_sampling_distance":

This parameter controls the relative sampling rate of the 3D object models that is used to represent the surfaces for the computation. This value is relative to the diameter of the respective object and defines the minimal distance between two sampled points. A higher value will lead to faster and a lower value to more accurate results. This parameter can also be set for each object independently by using 'rel_sampling_distance_obj1'"rel_sampling_distance_obj1""rel_sampling_distance_obj1""rel_sampling_distance_obj1""rel_sampling_distance_obj1""rel_sampling_distance_obj1" and 'rel_sampling_distance_obj2'"rel_sampling_distance_obj2""rel_sampling_distance_obj2""rel_sampling_distance_obj2""rel_sampling_distance_obj2""rel_sampling_distance_obj2".

Suggested values: 0.03, 0.05, 0.07.

Default: 0.05.

'key_point_fraction'"key_point_fraction""key_point_fraction""key_point_fraction""key_point_fraction""key_point_fraction":

This parameter controls the ratio of sampled points that are considered as key points for the matching process. The number is relative to the sampled points of the model. Reducing this ratio speeds up the process, whereas increasing leads to more robust results. This parameter can be also set for each object independently by using 'key_point_fraction_obj1'"key_point_fraction_obj1""key_point_fraction_obj1""key_point_fraction_obj1""key_point_fraction_obj1""key_point_fraction_obj1" and 'key_point_fraction_obj2'"key_point_fraction_obj2""key_point_fraction_obj2""key_point_fraction_obj2""key_point_fraction_obj2""key_point_fraction_obj2".

Suggested values: 0.2, 0.3, 0.4.

Default: 0.3.

'pose_ref_num_steps'"pose_ref_num_steps""pose_ref_num_steps""pose_ref_num_steps""pose_ref_num_steps""pose_ref_num_steps":

The number of iterative steps used for the pose refinement.

Suggested values: 5, 7, 10.

Default: 5.

'pose_ref_sub_sampling'"pose_ref_sub_sampling""pose_ref_sub_sampling""pose_ref_sub_sampling""pose_ref_sub_sampling""pose_ref_sub_sampling":

Number of points that are skipped for the pose refinement. The value specifies the number of points that are skipped per selected point. Increasing this value allows faster convergence at the cost of less accurate results. This parameter is only relevant for the smaller of the two objects.

Suggested values: 1, 2, 20.

Default: 2.

'pose_ref_dist_threshold_rel'"pose_ref_dist_threshold_rel""pose_ref_dist_threshold_rel""pose_ref_dist_threshold_rel""pose_ref_dist_threshold_rel""pose_ref_dist_threshold_rel":

Maximum distance that two faces might have to be considered as potentially overlapping. This value is relative to the diameter of the larger object.

Suggested values: 0.05, 0.1, 0.15.

Default: 0.1.

'pose_ref_dist_threshold_abs'"pose_ref_dist_threshold_abs""pose_ref_dist_threshold_abs""pose_ref_dist_threshold_abs""pose_ref_dist_threshold_abs""pose_ref_dist_threshold_abs":

Maximum distance that two faces might have to be considered as potentially overlapping, as absolute value.

'model_invert_normals'"model_invert_normals""model_invert_normals""model_invert_normals""model_invert_normals""model_invert_normals":

Invert the normals of the smaller object, if its normals are inverted relative to the other object.

List of values: 'true'"true""true""true""true""true", 'false'"false""false""false""false""false".

Default: 'false'"false""false""false""false""false".

运行信息

• 多线程类型:可重入(与非独占操作符并行运行)。
• 多线程作用域:全局(可以从任何线程调用)。
• 未经并行化处理。

This operator supports canceling timeouts and interrupts.

参数表

例程 (HDevelop)

* Generate two boxes
gen_box_object_model_3d ([0,0,0,0,0,0,0],3,2,1, ObjectModel3D1)
gen_box_object_model_3d ([0,0,0.5,15,0,0,0],3,2,1, ObjectModel3D2)
* Match them
register_object_model_3d_pair (ObjectModel3D1, ObjectModel3D2, 'matching',\
                              [], [], Pose, Score)

结果

register_object_model_3d_pairregister_object_model_3d_pairRegisterObjectModel3dPairRegisterObjectModel3dPairRegisterObjectModel3dPairregister_object_model_3d_pair returns 2 ( H_MSG_TRUE) if all parameters are correct. 如有必要，将引发异常。

可能的前置算子

read_object_model_3dread_object_model_3dReadObjectModel3dReadObjectModel3dReadObjectModel3dread_object_model_3d, gen_object_model_3d_from_pointsgen_object_model_3d_from_pointsGenObjectModel3dFromPointsGenObjectModel3dFromPointsGenObjectModel3dFromPointsgen_object_model_3d_from_points, xyz_to_object_model_3dxyz_to_object_model_3dXyzToObjectModel3dXyzToObjectModel3dXyzToObjectModel3dxyz_to_object_model_3d

可能的后置算子

register_object_model_3d_globalregister_object_model_3d_globalRegisterObjectModel3dGlobalRegisterObjectModel3dGlobalRegisterObjectModel3dGlobalregister_object_model_3d_global, affine_trans_object_model_3daffine_trans_object_model_3dAffineTransObjectModel3dAffineTransObjectModel3dAffineTransObjectModel3daffine_trans_object_model_3d, union_object_model_3dunion_object_model_3dUnionObjectModel3dUnionObjectModel3dUnionObjectModel3dunion_object_model_3d

参考其它

register_object_model_3d_globalregister_object_model_3d_globalRegisterObjectModel3dGlobalRegisterObjectModel3dGlobalRegisterObjectModel3dGlobalregister_object_model_3d_global, find_surface_modelfind_surface_modelFindSurfaceModelFindSurfaceModelFindSurfaceModelfind_surface_model

模块

3D Metrology

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