template <typename PointT> void
pcl::getPointCloudDifference (
const pcl::PointCloud<PointT> &src,
const pcl::PointCloud<PointT> &,
double threshold, const boost::shared_ptr<pcl::search::Search<PointT> > &tree,
pcl::PointCloud<PointT> &output)
{
// We're interested in a single nearest neighbor only
std::vector<int> nn_indices (1);
std::vector<float> nn_distances (1);
// The src indices that do not have a neighbor in tgt
std::vector<int> src_indices;
// Iterate through the source data set
for (int i = 0; i < static_cast<int> (src.points.size ()); ++i)
{
if (!isFinite (src.points[i]))
continue;
// Search for the closest point in the target data set (number of neighbors to find = 1)
if (!tree->nearestKSearch (src.points[i], 1, nn_indices, nn_distances))
{
PCL_WARN ("No neighbor found for point %zu (%f %f %f)!\n", i, src.points[i].x, src.points[i].y, src.points[i].z);
continue;
}
if (nn_distances[0] > threshold)
src_indices.push_back (i);
}
// Allocate enough space and copy the basics
output.points.resize (src_indices.size ());
output.header = src.header;
output.width = static_cast<uint32_t> (src_indices.size ());
output.height = 1;
//if (src.is_dense)
output.is_dense = true;
//else
// It's not necessarily true that is_dense is false if cloud_in.is_dense is false
// To verify this, we would need to iterate over all points and check for NaNs
//output.is_dense = false;
// Copy all the data fields from the input cloud to the output one
typedef typename pcl::traits::fieldList<PointT>::type FieldList;
// Iterate over each point
for (size_t i = 0; i < src_indices.size (); ++i)
// Iterate over each dimension
pcl::for_each_type <FieldList> (NdConcatenateFunctor <PointT, PointT> (src.points[src_indices[i]], output.points[i]));
}
template <typename PointSource, typename PointTarget, typename FeatureT> void
pcl::SampleConsensusInitialAlignment<PointSource, PointTarget, FeatureT>::findSimilarFeatures (
const FeatureCloud &input_features, const std::vector<int> &sample_indices,
std::vector<int> &corresponding_indices)
{
std::vector<int> nn_indices (k_correspondences_);
std::vector<float> nn_distances (k_correspondences_);
corresponding_indices.resize (sample_indices.size ());
for (size_t i = 0; i < sample_indices.size (); ++i)
{
// Find the k features nearest to input_features.points[sample_indices[i]]
feature_tree_->nearestKSearch (input_features, sample_indices[i], k_correspondences_, nn_indices, nn_distances);
// Select one at random and add it to corresponding_indices
int random_correspondence = getRandomIndex (k_correspondences_);
corresponding_indices[i] = nn_indices[random_correspondence];
}
}
template <typename PointT> void
pcl::getPointCloudDifference (
const pcl::PointCloud<PointT> &src,
double threshold,
const typename pcl::search::Search<PointT>::Ptr &tree,
pcl::PointCloud<PointT> &output)
{
// We're interested in a single nearest neighbor only
std::vector<int> nn_indices (1);
std::vector<float> nn_distances (1);
// The input cloud indices that do not have a neighbor in the target cloud
std::vector<int> src_indices;
// Iterate through the source data set
for (int i = 0; i < static_cast<int> (src.points.size ()); ++i)
{
// Ignore invalid points in the inpout cloud
if (!isFinite (src.points[i]))
continue;
// Search for the closest point in the target data set (number of neighbors to find = 1)
if (!tree->nearestKSearch (src.points[i], 1, nn_indices, nn_distances))
{
PCL_WARN ("No neighbor found for point %lu (%f %f %f)!\n", i, src.points[i].x, src.points[i].y, src.points[i].z);
continue;
}
// Add points without a corresponding point in the target cloud to the output cloud
if (nn_distances[0] > threshold)
src_indices.push_back (i);
}
// Copy all the data fields from the input cloud to the output one
copyPointCloud (src, src_indices, output);
// Output is always dense, as invalid points in the input cloud are ignored
output.is_dense = true;
}