greedy_verification.hpp

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#pragma once
#include <pcl/recognition/hv/greedy_verification.h>

template<typename ModelT, typename SceneT>
  void
  pcl::GreedyVerification<ModelT, SceneT>::initialize ()
  {
    //clear stuff
    recognition_models_.clear ();
    points_explained_by_rm_.clear ();

    // initialize mask...
    mask_.resize (visible_models_.size ());
    for (size_t i = 0; i < visible_models_.size (); i++)
      mask_[i] = false;

    // initialize explained_by_RM
    points_explained_by_rm_.resize (scene_cloud_downsampled_->points.size ());

    // initalize model
    for (size_t m = 0; m < visible_models_.size (); m++)
    {
      boost::shared_ptr < RecognitionModel > recog_model (new RecognitionModel);
      // voxelize model cloud
      recog_model->cloud_.reset (new pcl::PointCloud<ModelT>);
      recog_model->id_ = static_cast<int> (m);

      pcl::VoxelGrid<ModelT> voxel_grid;
      voxel_grid.setInputCloud (visible_models_[m]);
      voxel_grid.setLeafSize (resolution_, resolution_, resolution_);
      voxel_grid.filter (*(recog_model->cloud_));

      std::vector<int> explained_indices;
      std::vector<int> outliers;
      std::vector<int> nn_indices;
      std::vector<float> nn_distances;

      for (size_t i = 0; i < recog_model->cloud_->points.size (); i++)
      {
        if (!scene_downsampled_tree_->radiusSearch (recog_model->cloud_->points[i], inliers_threshold_, nn_indices, nn_distances,
                                                    std::numeric_limits<int>::max ()))
        {
          outliers.push_back (static_cast<int> (i));
        }
        else
        {
          for (size_t k = 0; k < nn_distances.size (); k++)
          {
            explained_indices.push_back (nn_indices[k]); //nn_indices[k] points to the scene
          }
        }
      }

      std::sort (explained_indices.begin (), explained_indices.end ());
      explained_indices.erase (std::unique (explained_indices.begin (), explained_indices.end ()), explained_indices.end ());

      recog_model->bad_information_ = static_cast<int> (outliers.size ());
      recog_model->explained_ = explained_indices;
      recog_model->good_information_ = static_cast<int> (explained_indices.size ());
      recog_model->regularizer_ = regularizer_;

      recognition_models_.push_back (recog_model);

      for (size_t i = 0; i < explained_indices.size (); i++)
      {
        points_explained_by_rm_[explained_indices[i]].push_back (recog_model);
      }
    }

    sortModels ();
  }

template<typename ModelT, typename SceneT>
  void
  pcl::GreedyVerification<ModelT, SceneT>::verify ()
  {
    initialize ();

    std::vector<bool> best_solution_;
    best_solution_.resize (recognition_models_.size ());

    for (size_t i = 0; i < recognition_models_.size (); i++)
    {
      if (static_cast<float> (recognition_models_[i]->good_information_) > (regularizer_
          * static_cast<float> (recognition_models_[i]->bad_information_)))
      {
        best_solution_[i] = true;
        updateGoodInformation (static_cast<int> (i));
      }
      else
        best_solution_[i] = false;
    }

    for (size_t i = 0; i < best_solution_.size (); i++)
    {
      if (best_solution_[i])
      {
        mask_[indices_models_[i].index_] = true;
      }
      else
      {
        mask_[indices_models_[i].index_] = false;
      }
    }
  }

#define PCL_INSTANTIATE_GreedyVerification(T1,T2) template class PCL_EXPORTS pcl::GreedyVerification<T1,T2>;