hv_papazov.h

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#pragma once
 
#include <pcl/pcl_macros.h>
#include <pcl/recognition/hv/hypotheses_verification.h>
#include <boost/graph/adjacency_list.hpp>
 
#include <memory>
 
namespace pcl
{
 
  /** \brief A hypothesis verification method proposed in
    * "An Efficient RANSAC for 3D Object Recognition in Noisy and Occluded Scenes", C. Papazov and D. Burschka, ACCV 2010
    * \author Aitor Aldoma, Federico Tombari
    */
 
  template<typename ModelT, typename SceneT>
  class PCL_EXPORTS PapazovHV : public HypothesisVerification<ModelT, SceneT>
  {
    using HypothesisVerification<ModelT, SceneT>::mask_;
    using HypothesisVerification<ModelT, SceneT>::scene_cloud_downsampled_;
    using HypothesisVerification<ModelT, SceneT>::scene_downsampled_tree_;
    using HypothesisVerification<ModelT, SceneT>::visible_models_;
    using HypothesisVerification<ModelT, SceneT>::complete_models_;
    using HypothesisVerification<ModelT, SceneT>::resolution_;
    using HypothesisVerification<ModelT, SceneT>::inliers_threshold_;
 
    float conflict_threshold_size_;
    float penalty_threshold_;
    float support_threshold_;
 
    class RecognitionModel
    {
      public:
        std::vector<int> explained_; //indices vector referencing explained_by_RM_
        typename pcl::PointCloud<ModelT>::Ptr cloud_;
        typename pcl::PointCloud<ModelT>::Ptr complete_cloud_;
        int bad_information_;
        int id_;
    };
 
    using RecognitionModelPtr = std::shared_ptr<RecognitionModel>;
 
    std::vector<int> explained_by_RM_; //represents the points of scene_cloud_ that are explained by the recognition models
    std::vector<RecognitionModelPtr> recognition_models_;
    std::vector<std::vector<RecognitionModelPtr>> points_explained_by_rm_; //if inner size > 1, conflict
    std::map<int, RecognitionModelPtr> graph_id_model_map_;
 
    using Graph = boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS, RecognitionModelPtr>;
    Graph conflict_graph_;
 
    //builds the conflict_graph
    void buildConflictGraph();
    //non-maxima suppresion on the conflict graph
    void nonMaximaSuppresion();
    //create recognition models
    void initialize();
 
    public:
      PapazovHV() : HypothesisVerification<ModelT,SceneT>() {
        support_threshold_ = 0.1f;
        penalty_threshold_ = 0.1f;
        conflict_threshold_size_ = 0.02f;
      }
 
      void setConflictThreshold(float t) {
        conflict_threshold_size_ = t;
      }
 
      void setSupportThreshold(float t) {
        support_threshold_ = t;
      }
 
      void setPenaltyThreshold(float t) {
        penalty_threshold_ = t;
      }
 
      //build conflict graph
      //non-maxima supression
      void verify() override;
  };
}
 
#ifdef PCL_NO_PRECOMPILE
#include <pcl/recognition/impl/hv/hv_papazov.hpp>
#endif