feature0d_to_image.h

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// -*- mode: c++ -*-
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#ifndef POSEDETECTION_MSGS_FEATURE0D_TO_IMAGE_H_
#define POSEDETECTION_MSGS_FEATURE0D_TO_IMAGE_H_

#include <ros/node_handle.h>
#include <sensor_msgs/Image.h>
#include <posedetection_msgs/ImageFeature0D.h>

#include <opencv/cv.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <boost/shared_ptr.hpp>

#include <message_filters/subscriber.h>
#include <message_filters/time_synchronizer.h>
#include <message_filters/synchronizer.h>
#include <message_filters/sync_policies/exact_time.h>

namespace posedetection_msgs
{
  cv::Mat draw_features(const cv::Mat src,
                        const std::vector<float> positions,
                        const std::vector<float> scales,
                        const std::vector<float> orientations)
  {
    cv::Mat dst;
    src.copyTo(dst);
    for(size_t i = 0; i < positions.size()/2; ++i) {
      float scale = i < scales.size() ? scales[i] : 10.0;
      cv::Point center = cv::Point(positions[2*i+0], positions[2*i+1]);
      cv::circle(dst, center, scale, CV_RGB(0,255,0));
      if( i < orientations.size() ) {
        // draw line indicating orientation
        cv::Point end_pt = cv::Point(center.x+std::cos(orientations[i])*scale,
            center.y+std::sin(orientations[i])*scale);
        cv::line(dst, center, end_pt, CV_RGB(255,0,0));
      }
    }
    return dst;
  }

  class Feature0DToImage
  {
  public:
    ros::NodeHandle _node;
    ros::Publisher _pub;
    ros::Subscriber _sub_imagefeature;
    typedef message_filters::sync_policies::ExactTime<
    sensor_msgs::Image,
    posedetection_msgs::Feature0D
    > SyncPolicy;
    boost::shared_ptr<message_filters::Synchronizer<SyncPolicy> > _sync;
    message_filters::Subscriber<sensor_msgs::Image> _sub_image;
    message_filters::Subscriber<posedetection_msgs::Feature0D> _sub_feature;

    Feature0DToImage();
    virtual ~Feature0DToImage();
    void imagefeature_cb(const posedetection_msgs::ImageFeature0DConstPtr& msg_ptr);
    void imagefeature_cb(const sensor_msgs::ImageConstPtr& image_msg,
                         const posedetection_msgs::Feature0DConstPtr& feature_msg);
  };
}

#endif