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40 #include <pcl/cloud_iterator.h>
46 namespace registration
49 template <typename PointSource, typename PointTarget, typename Scalar> inline void
50 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
51 estimateRigidTransformation (const pcl::PointCloud<PointSource> &cloud_src,
52 const pcl::PointCloud<PointTarget> &cloud_tgt,
53 Matrix4 &transformation_matrix) const
55 const auto nr_points = cloud_src.points.size ();
56 if (cloud_tgt.points.size () != nr_points)
58 PCL_ERROR ("[pcl::TransformationEstimationSymmetricPointToPlaneLLS::estimateRigidTransformation] Number or points in source (%lu) differs from target (%lu)!\n", nr_points, cloud_tgt.points.size ());
62 ConstCloudIterator<PointSource> source_it (cloud_src);
63 ConstCloudIterator<PointTarget> target_it (cloud_tgt);
64 estimateRigidTransformation (source_it, target_it, transformation_matrix);
68 template <typename PointSource, typename PointTarget, typename Scalar> void
69 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
70 estimateRigidTransformation (const pcl::PointCloud<PointSource> &cloud_src,
71 const std::vector<int> &indices_src,
72 const pcl::PointCloud<PointTarget> &cloud_tgt,
73 Matrix4 &transformation_matrix) const
75 const auto nr_points = indices_src.size ();
76 if (cloud_tgt.points.size () != nr_points)
78 PCL_ERROR ("[pcl::TransformationEstimationSymmetricPointToPlaneLLS::estimateRigidTransformation] Number or points in source (%lu) differs than target (%lu)!\n", indices_src.size (), cloud_tgt.points.size ());
82 ConstCloudIterator<PointSource> source_it (cloud_src, indices_src);
83 ConstCloudIterator<PointTarget> target_it (cloud_tgt);
84 estimateRigidTransformation (source_it, target_it, transformation_matrix);
88 template <typename PointSource, typename PointTarget, typename Scalar> inline void
89 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
90 estimateRigidTransformation (const pcl::PointCloud<PointSource> &cloud_src,
91 const std::vector<int> &indices_src,
92 const pcl::PointCloud<PointTarget> &cloud_tgt,
93 const std::vector<int> &indices_tgt,
94 Matrix4 &transformation_matrix) const
96 const auto nr_points = indices_src.size ();
97 if (indices_tgt.size () != nr_points)
99 PCL_ERROR ("[pcl::TransformationEstimationSymmetricPointToPlaneLLS::estimateRigidTransformation] Number or points in source (%lu) differs than target (%lu)!\n", indices_src.size (), indices_tgt.size ());
103 ConstCloudIterator<PointSource> source_it (cloud_src, indices_src);
104 ConstCloudIterator<PointTarget> target_it (cloud_tgt, indices_tgt);
105 estimateRigidTransformation (source_it, target_it, transformation_matrix);
109 template <typename PointSource, typename PointTarget, typename Scalar> inline void
110 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
111 estimateRigidTransformation (const pcl::PointCloud<PointSource> &cloud_src,
112 const pcl::PointCloud<PointTarget> &cloud_tgt,
113 const pcl::Correspondences &correspondences,
114 Matrix4 &transformation_matrix) const
116 ConstCloudIterator<PointSource> source_it (cloud_src, correspondences, true);
117 ConstCloudIterator<PointTarget> target_it (cloud_tgt, correspondences, false);
118 estimateRigidTransformation (source_it, target_it, transformation_matrix);
122 template <typename PointSource, typename PointTarget, typename Scalar> inline void
123 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
124 constructTransformationMatrix (const Vector6 ¶meters,
125 Matrix4 &transformation_matrix) const
127 // Construct the transformation matrix from rotation and translation
128 const Eigen::AngleAxis<Scalar> rotation_z (parameters (2), Eigen::Matrix<Scalar, 3, 1>::UnitZ ());
129 const Eigen::AngleAxis<Scalar> rotation_y (parameters (1), Eigen::Matrix<Scalar, 3, 1>::UnitY ());
130 const Eigen::AngleAxis<Scalar> rotation_x (parameters (0), Eigen::Matrix<Scalar, 3, 1>::UnitX ());
131 const Eigen::Translation<Scalar, 3> translation (parameters (3), parameters (4), parameters (5));
132 const Eigen::Transform<Scalar, 3, Eigen::Affine> transform = rotation_z * rotation_y * rotation_x *
134 rotation_z * rotation_y * rotation_x;
135 transformation_matrix = transform.matrix ();
139 template <typename PointSource, typename PointTarget, typename Scalar> inline void
140 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
141 estimateRigidTransformation (ConstCloudIterator<PointSource>& source_it, ConstCloudIterator<PointTarget>& target_it, Matrix4 &transformation_matrix) const
143 using Matrix6 = Eigen::Matrix<Scalar, 6, 6>;
144 using Vector3 = Eigen::Matrix<Scalar, 3, 1>;
150 auto M = ATA.template selfadjointView<Eigen::Upper> ();
152 // Approximate as a linear least squares problem
155 for (; source_it.isValid () && target_it.isValid (); ++source_it, ++target_it)
157 const Vector3 p (source_it->x, source_it->y, source_it->z);
158 const Vector3 q (target_it->x, target_it->y, target_it->z);
159 const Vector3 n1 (source_it->getNormalVector3fMap().template cast<Scalar>());
160 const Vector3 n2 (target_it->getNormalVector3fMap().template cast<Scalar>());
162 if (enforce_same_direction_normals_)
164 if (n1.dot (n2) >= 0.)
174 if (!p.array().isFinite().all() ||
175 !q.array().isFinite().all() ||
176 !n.array().isFinite().all())
182 v << (p + q).cross (n), n;
185 ATb += v * (q - p).dot (n);
189 const Vector6 x = M.ldlt ().solve (ATb);
191 // Construct the transformation matrix from x
192 constructTransformationMatrix (x, transformation_matrix);
196 template <typename PointSource, typename PointTarget, typename Scalar> inline void
197 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
198 setEnforceSameDirectionNormals (bool enforce_same_direction_normals)
200 enforce_same_direction_normals_ = enforce_same_direction_normals;
204 template <typename PointSource, typename PointTarget, typename Scalar> inline bool
205 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
206 getEnforceSameDirectionNormals ()
208 return enforce_same_direction_normals_;
211 } // namespace registration