polygon_array_distance_likelihood_nodelet.cpp

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// -*- mode: c++ -*-
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#define BOOST_PARAMETER_MAX_ARITY 7

#include "jsk_pcl_ros/polygon_array_distance_likelihood.h"
#include "jsk_pcl_ros/tf_listener_singleton.h"
#include "jsk_pcl_ros/geo_util.h"
#include "jsk_pcl_ros/pcl_conversion_util.h"

namespace jsk_pcl_ros
{
  void PolygonArrayDistanceLikelihood::onInit()
  {
    DiagnosticNodelet::onInit();
    if (!pnh_->getParam("target_frame_id", target_frame_id_)) {
      JSK_ROS_ERROR("You need to specify ~target_frame_id");
      return;
    }
    pnh_->param("tf_queue_size", tf_queue_size_, 10);
    tf_listener_ = TfListenerSingleton::getInstance();
    pub_ = advertise<jsk_recognition_msgs::PolygonArray>(*pnh_, "output", 1);
  }

  void PolygonArrayDistanceLikelihood::subscribe()
  {
    sub_.subscribe(*pnh_, "input", 10);
    tf_filter_.reset(new tf::MessageFilter<jsk_recognition_msgs::PolygonArray>(
                       sub_,
                       *tf_listener_,
                       target_frame_id_,
                       tf_queue_size_));
    tf_filter_->registerCallback(
      boost::bind(&PolygonArrayDistanceLikelihood::likelihood, this, _1));
  }

  void PolygonArrayDistanceLikelihood::unsubscribe()
  {
    sub_.unsubscribe();
  }

  void PolygonArrayDistanceLikelihood::likelihood(
    const jsk_recognition_msgs::PolygonArray::ConstPtr& msg)
  {
    boost::mutex::scoped_lock lock(mutex_);
    jsk_recognition_msgs::PolygonArray new_msg(*msg);

    try
    {
      // Resolve tf
      // ConstPtrmpute position of target_frame_id
      // respected from msg->header.frame_id
      tf::StampedTransform transform;
      tf_listener_->lookupTransform(
        msg->header.frame_id, target_frame_id_, msg->header.stamp, transform);
      Eigen::Affine3f pose;
      tf::transformTFToEigen(transform, pose);
      Eigen::Vector3f p(pose.translation());

      double min_distance = DBL_MAX;
      double max_distance = - DBL_MAX;
      std::vector<double> distances; 
      for (size_t i = 0; i < msg->polygons.size(); i++) {
        Polygon::Ptr polygon = Polygon::fromROSMsgPtr(msg->polygons[i].polygon);
        double distance;
        polygon->nearestPoint(p, distance);
        min_distance = std::min(distance, min_distance);
        max_distance = std::max(distance, max_distance);
        distances.push_back(distance);
      }

      // Normalization
      for (size_t i = 0; i < distances.size(); i++) {
        // double normalized_distance
        //   = (distances[i] - min_distance) / (max_distance - min_distance);
        double likelihood = 1 / (1 + distances[i] * distances[i]);
        
        if (msg->likelihood.size() == 0) {
          new_msg.likelihood.push_back(likelihood);
        }
        else {
          new_msg.likelihood[i] = new_msg.likelihood[i] * likelihood;
        }
      }
      pub_.publish(new_msg);
    }
    catch (...)
    {
      JSK_NODELET_ERROR("Unknown transform error");
    }
    
  }
}

#include <pluginlib/class_list_macros.h>
PLUGINLIB_EXPORT_CLASS (jsk_pcl_ros::PolygonArrayDistanceLikelihood,
                        nodelet::Nodelet);