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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.size ();
56 if (cloud_tgt.size () != nr_points)
58 PCL_ERROR("[pcl::TransformationEstimationSymmetricPointToPlaneLLS::"
59 "estimateRigidTransformation] Number or points in source (%zu) differs "
60 "from target (%zu)!\n",
61 static_cast<std::size_t>(nr_points),
62 static_cast<std::size_t>(cloud_tgt.size()));
66 ConstCloudIterator<PointSource> source_it (cloud_src);
67 ConstCloudIterator<PointTarget> target_it (cloud_tgt);
68 estimateRigidTransformation (source_it, target_it, transformation_matrix);
72 template <typename PointSource, typename PointTarget, typename Scalar> void
73 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
74 estimateRigidTransformation (const pcl::PointCloud<PointSource> &cloud_src,
75 const std::vector<int> &indices_src,
76 const pcl::PointCloud<PointTarget> &cloud_tgt,
77 Matrix4 &transformation_matrix) const
79 const auto nr_points = indices_src.size ();
80 if (cloud_tgt.size () != nr_points)
82 PCL_ERROR("[pcl::TransformationEstimationSymmetricPointToPlaneLLS::"
83 "estimateRigidTransformation] Number or points in source (%zu) differs "
84 "than target (%zu)!\n",
86 static_cast<std::size_t>(cloud_tgt.size()));
90 ConstCloudIterator<PointSource> source_it (cloud_src, indices_src);
91 ConstCloudIterator<PointTarget> target_it (cloud_tgt);
92 estimateRigidTransformation (source_it, target_it, transformation_matrix);
96 template <typename PointSource, typename PointTarget, typename Scalar> inline void
97 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
98 estimateRigidTransformation (const pcl::PointCloud<PointSource> &cloud_src,
99 const std::vector<int> &indices_src,
100 const pcl::PointCloud<PointTarget> &cloud_tgt,
101 const std::vector<int> &indices_tgt,
102 Matrix4 &transformation_matrix) const
104 const auto nr_points = indices_src.size ();
105 if (indices_tgt.size () != nr_points)
107 PCL_ERROR("[pcl::TransformationEstimationSymmetricPointToPlaneLLS::"
108 "estimateRigidTransformation] Number or points in source (%zu) differs "
109 "than target (%zu)!\n",
115 ConstCloudIterator<PointSource> source_it (cloud_src, indices_src);
116 ConstCloudIterator<PointTarget> target_it (cloud_tgt, indices_tgt);
117 estimateRigidTransformation (source_it, target_it, transformation_matrix);
121 template <typename PointSource, typename PointTarget, typename Scalar> inline void
122 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
123 estimateRigidTransformation (const pcl::PointCloud<PointSource> &cloud_src,
124 const pcl::PointCloud<PointTarget> &cloud_tgt,
125 const pcl::Correspondences &correspondences,
126 Matrix4 &transformation_matrix) const
128 ConstCloudIterator<PointSource> source_it (cloud_src, correspondences, true);
129 ConstCloudIterator<PointTarget> target_it (cloud_tgt, correspondences, false);
130 estimateRigidTransformation (source_it, target_it, transformation_matrix);
134 template <typename PointSource, typename PointTarget, typename Scalar> inline void
135 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
136 constructTransformationMatrix (const Vector6 ¶meters,
137 Matrix4 &transformation_matrix) const
139 // Construct the transformation matrix from rotation and translation
140 const Eigen::AngleAxis<Scalar> rotation_z (parameters (2), Eigen::Matrix<Scalar, 3, 1>::UnitZ ());
141 const Eigen::AngleAxis<Scalar> rotation_y (parameters (1), Eigen::Matrix<Scalar, 3, 1>::UnitY ());
142 const Eigen::AngleAxis<Scalar> rotation_x (parameters (0), Eigen::Matrix<Scalar, 3, 1>::UnitX ());
143 const Eigen::Translation<Scalar, 3> translation (parameters (3), parameters (4), parameters (5));
144 const Eigen::Transform<Scalar, 3, Eigen::Affine> transform = rotation_z * rotation_y * rotation_x *
146 rotation_z * rotation_y * rotation_x;
147 transformation_matrix = transform.matrix ();
151 template <typename PointSource, typename PointTarget, typename Scalar> inline void
152 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
153 estimateRigidTransformation (ConstCloudIterator<PointSource>& source_it, ConstCloudIterator<PointTarget>& target_it, Matrix4 &transformation_matrix) const
155 using Matrix6 = Eigen::Matrix<Scalar, 6, 6>;
156 using Vector3 = Eigen::Matrix<Scalar, 3, 1>;
162 auto M = ATA.template selfadjointView<Eigen::Upper> ();
164 // Approximate as a linear least squares problem
167 for (; source_it.isValid () && target_it.isValid (); ++source_it, ++target_it)
169 const Vector3 p (source_it->x, source_it->y, source_it->z);
170 const Vector3 q (target_it->x, target_it->y, target_it->z);
171 const Vector3 n1 (source_it->getNormalVector3fMap().template cast<Scalar>());
172 const Vector3 n2 (target_it->getNormalVector3fMap().template cast<Scalar>());
174 if (enforce_same_direction_normals_)
176 if (n1.dot (n2) >= 0.)
186 if (!p.array().isFinite().all() ||
187 !q.array().isFinite().all() ||
188 !n.array().isFinite().all())
194 v << (p + q).cross (n), n;
197 ATb += v * (q - p).dot (n);
201 const Vector6 x = M.ldlt ().solve (ATb);
203 // Construct the transformation matrix from x
204 constructTransformationMatrix (x, transformation_matrix);
208 template <typename PointSource, typename PointTarget, typename Scalar> inline void
209 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
210 setEnforceSameDirectionNormals (bool enforce_same_direction_normals)
212 enforce_same_direction_normals_ = enforce_same_direction_normals;
216 template <typename PointSource, typename PointTarget, typename Scalar> inline bool
217 TransformationEstimationSymmetricPointToPlaneLLS<PointSource, PointTarget, Scalar>::
218 getEnforceSameDirectionNormals ()
220 return enforce_same_direction_normals_;
223 } // namespace registration