point_pose_extractor.cpp

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#include <ros/ros.h>
#include <rospack/rospack.h>
#include <opencv/highgui.h>
#include <cv_bridge/cv_bridge.h>
#pragma message "Compiling " __FILE__ "..."
#include <posedetection_msgs/Feature0DDetect.h>
#include <posedetection_msgs/ImageFeature0D.h>
#include <posedetection_msgs/ObjectDetection.h>
#include <posedetection_msgs/Object6DPose.h>
#include <geometry_msgs/Pose.h>
#include <geometry_msgs/Quaternion.h>
#include <sensor_msgs/image_encodings.h>
#include <image_transport/image_transport.h>
#include <image_geometry/pinhole_camera_model.h>
#include <tf/tf.h>
#include <boost/shared_ptr.hpp>
#include <boost/foreach.hpp>
#include <boost/filesystem.hpp>
#include <vector>
#include <sstream>
#include <iostream>
#include <dynamic_reconfigure/server.h>
#include <jsk_perception/point_pose_extractorConfig.h>
#include <jsk_perception/SetTemplate.h>

namespace enc = sensor_msgs::image_encodings;

bool _first_sample_change;

void features2keypoint (posedetection_msgs::Feature0D features,
                        std::vector<cv::KeyPoint>& keypoints,
                        cv::Mat& descriptors){
  keypoints.resize(features.scales.size());
  descriptors.create(features.scales.size(),features.descriptor_dim,CV_32FC1);
  std::vector<cv::KeyPoint>::iterator keypoint_it = keypoints.begin();
  for ( int i=0; keypoint_it != keypoints.end(); ++keypoint_it, ++i ) {
    *keypoint_it = cv::KeyPoint(cv::Point2f(features.positions[i*2+0],
                                            features.positions[i*2+1]),
                                features.descriptor_dim, // size
                                features.orientations[i], //angle
                                0, // resonse
                                features.scales[i] // octave
                                );
    for (int j = 0; j < features.descriptor_dim; j++){
      descriptors.at<float>(i,j) =
        features.descriptors[i*features.descriptor_dim+j];
    }
  }
}


class Matching_Template
{
public:
  std::string _matching_frame;
  cv::Mat _template_img;
  std::vector<cv::KeyPoint> _template_keypoints;
  cv::Mat _template_descriptors;
  int _original_width_size;
  int _original_height_size;
  double _template_width;       // width of template [m]
  double _template_height;      // height of template [m]
  tf::Transform _relativepose;
  cv::Mat _affine_matrix;
  std::string _window_name;
  // The maximum allowed reprojection error to treat a point pair as an inlier
  double _reprojection_threshold;
  // threshold on squared ratio of distances between NN and 2nd NN
  double _distanceratio_threshold;
  std::vector<cv::Point2d> _correspondances;
  cv::Mat _previous_stack_img;

  Matching_Template(){
  }
  Matching_Template(cv::Mat img,
                    std::string matching_frame,
                    int original_width_size,
                    int original_height_size,
                    double template_width,
                    double template_height,
                    tf::Transform relativepose,
                    cv::Mat affine_matrix,
                    double reprojection_threshold,
                    double distanceratio_threshold,
                    std::string window_name,
                    bool autosize){

    _template_img = img.clone();
    _matching_frame = matching_frame;
    _original_width_size = original_width_size;
    _original_height_size = original_height_size;
    _template_width = template_width;
    _template_height = template_height;
    _relativepose = relativepose;
    _affine_matrix = affine_matrix;
    _window_name = window_name;
    _reprojection_threshold = reprojection_threshold;
    _distanceratio_threshold = distanceratio_threshold;
    _template_keypoints.clear();
    _correspondances.clear();
    //    cv::namedWindow(_window_name, autosize ? CV_WINDOW_AUTOSIZE : 0);
  }


  virtual ~Matching_Template(){
    std::cerr << "delete " << _window_name << std::endl;
  }


  std::string get_window_name(){
    return _window_name;
  }

  std::vector<cv::Point2d>* correspondances(){
    return &_correspondances;
  }

  bool check_template (){
    if (_template_img.empty() && _template_keypoints.size() == 0 &&
        _template_descriptors.empty()){
      return false;
    }
    else {
      return true;
    }
  }


  int set_template(ros::ServiceClient client){
    posedetection_msgs::Feature0DDetect srv;

    if ( _template_img.empty()) {
      ROS_ERROR ("template picture is empty.");
      return -1;
    }
    ROS_INFO_STREAM("read template image and call " << client.getService() << " service");
    cv_bridge::CvImage cv_img;
    cv_img.image = cv::Mat(_template_img);
    cv_img.encoding = std::string("bgr8");
    srv.request.image = *(cv_img.toImageMsg());
    if (client.call(srv)) {
      ROS_INFO_STREAM("get features with " << srv.response.features.scales.size() << " descriptoins");
      features2keypoint (srv.response.features, _template_keypoints, _template_descriptors);

      // inverse affine translation
      cv::Mat M_inv;
      cv::Mat dst;
      cv::invert(_affine_matrix, M_inv);
      //      cv::drawKeypoints (tmp, _template_keypoints, dst, cv::Scalar::all(1), cv::DrawMatchesFlags::DRAW_RICH_KEYPOINTS);
      //      cv::drawKeypoints (tmp, _template_keypoints, dst);
      // cv::warpPerspective(_template_img, dst, M_inv,
      //                          cv::Size(_original_width_size, _original_height_size),
      //                          CV_INTER_LINEAR, IPL_BORDER_CONSTANT, 0);
      for (int i = 0; i < (int)_template_keypoints.size(); i++){
        cv::Point2f pt;
        cv::Mat pt_mat(cv::Size(1,1), CV_32FC2, &pt);
        cv::Mat pt_src_mat(cv::Size(1,1), CV_32FC2, &_template_keypoints.at(i).pt);
        cv::perspectiveTransform (pt_src_mat, pt_mat, M_inv);
        _template_keypoints.at(i).pt = pt_mat.at<cv::Point2f>(0,0);
      }
      //      cvSetMouseCallback (_window_name.c_str(), &PointPoseExtractor::cvmousecb, this);
      //      _template_img = dst;
      return 0;
    } else {
      ROS_ERROR("Failed to call service Feature0DDetect");
      return 1;
    }
  }


  double log_fac( int n )
  {
    static std::vector<double> slog_table;
    int osize = slog_table.size();
    if(osize <= n){
      slog_table.resize(n+1);
      if(osize == 0){
        slog_table[0] = -1;
        slog_table[1] = log(1.0);
        osize = 2;
      }
      for(int i = osize; i <= n; i++ ){
        slog_table[i] = slog_table[i-1] + log(i);
      }
    }
    return slog_table[n];
  }

  int min_inlier( int n, int m, double p_badsupp, double p_badxform )
  {
    double pi, sum;
    int i, j;
    double lp_badsupp = log( p_badsupp );
    double lp_badsupp1 = log( 1.0 - p_badsupp );
    for( j = m+1; j <= n; j++ ){
      sum = 0;
      for( i = j; i <= n; i++ ){
        pi = (i-m) * lp_badsupp + (n-i+m) * lp_badsupp1 +
          log_fac( n - m ) - log_fac( i - m ) - log_fac( n - i );
        sum += exp( pi );
      }
      if( sum < p_badxform )
        break;
    }
    return j;
  }


  bool estimate_od (ros::ServiceClient client, cv::Mat src_img,
                    std::vector<cv::KeyPoint> sourceimg_keypoints,
                    image_geometry::PinholeCameraModel pcam,
                    double err_thr, cv::Mat &stack_img,
                    cv::flann::Index* ft, posedetection_msgs::Object6DPose* o6p){

    if ( _template_keypoints.size()== 0 &&
         _template_descriptors.empty() ){
      set_template(client);
    }
    if ( _template_keypoints.size()== 0 &&
         _template_descriptors.empty() ) {
      ROS_ERROR ("Template image was not set.");
      return false;
    }

    // stacked image
    cv::Size stack_size  = cv::Size(MAX(src_img.cols,_template_img.cols),
                                    src_img.rows+_template_img.rows);
    stack_img = cv::Mat(stack_size,CV_8UC3);
    stack_img = cv::Scalar(0);
    cv::Mat stack_img_tmp(stack_img,cv::Rect(0,0,_template_img.cols,_template_img.rows));
    cv::add(stack_img_tmp, _template_img, stack_img_tmp);
    cv::Mat stack_img_src(stack_img,cv::Rect(0,_template_img.rows,src_img.cols,src_img.rows));
    cv::add(stack_img_src, src_img, stack_img_src);
    _previous_stack_img = stack_img.clone();

    // matching
    cv::Mat m_indices(_template_descriptors.rows, 2, CV_32S);
    cv::Mat m_dists(_template_descriptors.rows, 2, CV_32F);
    ft->knnSearch(_template_descriptors, m_indices, m_dists, 2, cv::flann::SearchParams(-1) );

    // matched points
    std::vector<cv::Point2f> pt1, pt2;
    std::vector<int> queryIdxs,trainIdxs;
    for ( unsigned int j = 0; j < _template_keypoints.size(); j++ ) {
      if ( m_dists.at<float>(j,0) < m_dists.at<float>(j,1) * _distanceratio_threshold) {
        queryIdxs.push_back(j);
        trainIdxs.push_back(m_indices.at<int>(j,0));
      }
    }
    if ( queryIdxs.size() == 0 ) {
      ROS_WARN_STREAM("could not found matched points with distanceratio(" <<_distanceratio_threshold << ")");
    } else {
      cv::KeyPoint::convert(_template_keypoints,pt1,queryIdxs);
      cv::KeyPoint::convert(sourceimg_keypoints,pt2,trainIdxs);
    }

    ROS_INFO ("Found %d total matches among %d template keypoints", (int)pt2.size(), (int)_template_keypoints.size());

    cv::Mat H;
    std::vector<uchar> mask((int)pt2.size());

    if ( pt1.size() > 4 ) {
          // ToDO for curve face
      H = cv::findHomography(cv::Mat(pt1), cv::Mat(pt2), mask, CV_RANSAC, _reprojection_threshold);
    }

    // draw line
    for (int j = 0; j < (int)pt1.size(); j++){
      cv::Point2f pt, pt_orig;
      cv::Mat pt_mat(cv::Size(1,1), CV_32FC2, &pt);
      cv::Mat pt_src_mat(cv::Size(1,1), CV_32FC2, &pt1.at(j));
      cv::perspectiveTransform (pt_src_mat, pt_mat, _affine_matrix);
      pt_orig = pt_mat.at<cv::Point2f>(0,0);
      if ( mask.at(j)){
        cv::line(stack_img, pt_orig, pt2.at(j)+cv::Point2f(0,_template_img.rows),
                 CV_RGB(0,255,0), 1,8,0);
      }
      else {
        cv::line(stack_img, pt_orig, pt2.at(j)+cv::Point2f(0,_template_img.rows),
                 CV_RGB(255,0,255), 1,8,0);
      }
    }
    int inlier_sum = 0;
    for (int k=0; k < (int)mask.size(); k++){
      inlier_sum += (int)mask.at(k);
    }

    double text_scale = 1.5;
    {
      int fontFace = 0, thickness = 0, baseLine;
      int x, y;
      cv::Size text_size;
      std::string text;

      text = "inlier: " + boost::lexical_cast<std::string>((int)inlier_sum) + " / " + boost::lexical_cast<std::string>((int)pt2.size());
      text_size = cv::getTextSize(text, fontFace, text_scale, thickness, &baseLine);
      x = stack_img.size().width - text_size.width;
      y = text_size.height + thickness + 10; // 10pt pading
      cv::putText (stack_img, text, cv::Point(x, y),
                   fontFace, text_scale, CV_RGB(0, 255, 0),
                   thickness, 8, false);

      text = "template: " + boost::lexical_cast<std::string>((int)_template_keypoints.size());
      text_size = cv::getTextSize(text, fontFace, text_scale, thickness, &baseLine);
      x = stack_img.size().width - text_size.width;
      y += text_size.height + thickness + 10; // 10pt pading
      cv::putText (stack_img, text, cv::Point(x, y),
                   fontFace, text_scale, CV_RGB(0, 255, 0),
                   thickness, 8, false);
    }

    // draw correspondances
    ROS_INFO("_correspondances.size: %d", (int)_correspondances.size());
    for (int j = 0; j < (int)_correspondances.size(); j++){
      cv::circle(stack_img, cv::Point2f(_correspondances.at(j).x, _correspondances.at(j).y + _template_img.size().height),
                 8, CV_RGB(255,0,0), -1);
    }

    if ((cv::countNonZero( H ) == 0) || (inlier_sum < min_inlier((int)pt2.size(), 4, 0.10, 0.01))){
      if( _window_name != "" )
        cv::imshow(_window_name, stack_img);
      return false;
    }

    std::string _type;
    char chr[20];

    // number of match points
    sprintf(chr, "%d", (int)pt2.size());
    _type = _matching_frame + "_" + std::string(chr);

    sprintf(chr, "%d", inlier_sum);
    _type = _type + "_" + std::string(chr);

    cv::Point2f corners2d[4] = {cv::Point2f(0,0),
                                cv::Point2f(_original_width_size,0),
                                cv::Point2f(_original_width_size,_original_height_size),
                                cv::Point2f(0,_original_height_size)};
    cv::Mat corners2d_mat (cv::Size(4, 1), CV_32FC2, corners2d);
    cv::Point3f corners3d[4] = {cv::Point3f(0,0,0),
                                cv::Point3f(0,_template_width,0),
                                cv::Point3f(_template_height,_template_width,0),
                                cv::Point3f(_template_height,0,0)};
    cv::Mat corners3d_mat (cv::Size(4, 1), CV_32FC3, corners3d);

    cv::Mat corners2d_mat_trans;

    cv::perspectiveTransform (corners2d_mat, corners2d_mat_trans, H);

    double fR3[3], fT3[3];
    cv::Mat rvec(3, 1, CV_64FC1, fR3);
    cv::Mat tvec(3, 1, CV_64FC1, fT3);
    cv::Mat zero_distortion_mat = cv::Mat::zeros(4, 1, CV_64FC1);

    cv::Mat camera_matrix = pcam.projectionMatrix()(cv::Range::all(), cv::Range(0, 3));
    cv::solvePnP (corners3d_mat, corners2d_mat_trans, camera_matrix,
                  zero_distortion_mat,//if unrectified: pcam.distortionCoeffs()
                  rvec, tvec);

    tf::Transform checktf, resulttf;

    checktf.setOrigin( tf::Vector3(fT3[0], fT3[1], fT3[2] ) );

    double rx = fR3[0], ry = fR3[1], rz = fR3[2];
    tf::Quaternion quat;
    double angle = cv::norm(rvec);
    quat.setRotation(tf::Vector3(rx/angle, ry/angle, rz/angle), angle);
    checktf.setRotation( quat );

    resulttf = checktf * _relativepose;

    ROS_INFO( "tx: (%0.2lf,%0.2lf,%0.2lf) rx: (%0.2lf,%0.2lf,%0.2lf)",
              resulttf.getOrigin().getX(),
              resulttf.getOrigin().getY(),
              resulttf.getOrigin().getZ(),
              resulttf.getRotation().getAxis().x() * resulttf.getRotation().getAngle(),
              resulttf.getRotation().getAxis().y() * resulttf.getRotation().getAngle(),
              resulttf.getRotation().getAxis().z() * resulttf.getRotation().getAngle());

    o6p->pose.position.x = resulttf.getOrigin().getX();
    o6p->pose.position.y = resulttf.getOrigin().getY();
    o6p->pose.position.z = resulttf.getOrigin().getZ();
    o6p->pose.orientation.w = resulttf.getRotation().w();
    o6p->pose.orientation.x = resulttf.getRotation().x();
    o6p->pose.orientation.y = resulttf.getRotation().y();
    o6p->pose.orientation.z = resulttf.getRotation().z();
    o6p->type = _matching_frame; // _type

    // draw 3d cube model
    std::vector<cv::Point2f> projected_top;
    {
      tf::Vector3 coords[8] = {tf::Vector3(0,0,0),
                               tf::Vector3(0, _template_width, 0),
                               tf::Vector3(_template_height, _template_width,0),
                               tf::Vector3(_template_height, 0, 0),
                               tf::Vector3(0, 0, -0.03),
                               tf::Vector3(0, _template_width, -0.03),
                               tf::Vector3(_template_height, _template_width, -0.03),
                               tf::Vector3(_template_height, 0, -0.03)};

      projected_top = std::vector<cv::Point2f>(8);

      for(int i=0; i<8; i++) {
        coords[i] = checktf * coords[i];
        cv::Point3f pt(coords[i].getX(), coords[i].getY(), coords[i].getZ());
        projected_top[i] = pcam.project3dToPixel(pt);
      }
    }

    { // check if the matched region does not too big or too small
      float max_x, max_y, min_x, min_y;
      max_x = max_y = -1e9;
      min_x = min_y = 1e9;
      for (int j = 0; j < 4; j++){
        cv::Point2f pt = corners2d_mat_trans.at<cv::Point2f>(0,j);
        max_x = std::max(max_x, pt.x), max_y = std::max(max_y, pt.y);
        min_x = std::min(min_x, pt.x), min_y = std::min(min_y, pt.y);
      }
      if((max_x - min_x) < 30 || (max_y - min_y) < 30 ||
         src_img.rows < (max_x - min_x)/2 || src_img.cols < (max_y - min_y)/2){
        return false;
      }
    }

    double err_sum = 0;
    bool err_success = true;
    for (int j = 0; j < 4; j++){
      double err = sqrt(pow((corners2d_mat_trans.at<cv::Point2f>(0,j).x - projected_top.at(j).x), 2) +
                      pow((corners2d_mat_trans.at<cv::Point2f>(0,j).y - projected_top.at(j).y), 2));
      err_sum += err;
    }
    if (err_sum > err_thr){
      err_success = false;
    }

    // draw lines around the detected object
    for (int j = 0; j < corners2d_mat_trans.cols; j++){
      cv::Point2f p1(corners2d_mat_trans.at<cv::Point2f>(0,j).x,
                     corners2d_mat_trans.at<cv::Point2f>(0,j).y+_template_img.rows);
      cv::Point2f p2(corners2d_mat_trans.at<cv::Point2f>(0,(j+1)%corners2d_mat_trans.cols).x,
                     corners2d_mat_trans.at<cv::Point2f>(0,(j+1)%corners2d_mat_trans.cols).y+_template_img.rows);
      cv::line (stack_img, p1, p2, CV_RGB(255, 0, 0),
                (err_success?4:1), // width
                CV_AA, 0);
    }

    // draw 3d cube model
    if(projected_top.size() == 8) { // verify, the size is 8
      int cnt = 8;
      std::vector<cv::Point2f> ps(cnt);
      for(int i=0; i<cnt; i++)
        ps[i] = cv::Point2f(projected_top[i].x,
                            projected_top[i].y+_template_img.rows);

      int draw_width = ( err_success ? 3 : 1);
      for(int i=0; i<4; i++) {
        cv::line (stack_img, ps[i], ps[(i+1)%4], CV_RGB(0, 0, 255), draw_width, CV_AA, 0);
        cv::line (stack_img, ps[i+4], ps[(i+1)%4+4], CV_RGB(0, 0, 255), draw_width, CV_AA, 0);
        cv::line (stack_img, ps[i], ps[i+4], CV_RGB(0, 0, 255), draw_width, CV_AA, 0);
      }
    }

    // draw coords
    if ( err_success )
    {
      tf::Vector3 coords[4] = { tf::Vector3(0,0,0),
                                tf::Vector3(0.05,0,0),
                                tf::Vector3(0,0.05,0),
                                tf::Vector3(0,0,0.05)};
      std::vector<cv::Point2f> ps(4);

      for(int i=0; i<4; i++) {
        coords[i] = resulttf * coords[i];
        cv::Point3f pt(coords[i].getX(), coords[i].getY(), coords[i].getZ());   
        ps[i] = pcam.project3dToPixel(pt);
        ps[i].y += _template_img.rows; // draw on camera image
      }

      cv::line (stack_img, ps[0], ps[1], CV_RGB(255, 0, 0), 3, CV_AA, 0);
      cv::line (stack_img, ps[0], ps[2], CV_RGB(0, 255, 0), 3, CV_AA, 0);
      cv::line (stack_img, ps[0], ps[3], CV_RGB(0, 0, 255), 3, CV_AA, 0);
    }

    // write text on image
    {
      std::string text;
      int x, y;
      text = "error: " + boost::lexical_cast<std::string>(err_sum);
      x = stack_img.size().width - 16*17*text_scale; // 16pt * 17
      y = _template_img.size().height - (16 + 2)*text_scale*6;
      cv::putText (stack_img, text, cv::Point(x, y),
                   0, text_scale, CV_RGB(0, 255, 0),
                   2, 8, false);

    }
    // for debug window
    if( _window_name != "" )
      cv::imshow(_window_name, stack_img);

    return err_success;
  }
};  // the end of difinition of class Matching_Template


class PointPoseExtractor
{
  ros::NodeHandle _n;
  image_transport::ImageTransport it;
  ros::Subscriber _sub;
  ros::ServiceServer _server;
  ros::ServiceClient _client;
  ros::Publisher _pub, _pub_agg;
  image_transport::Publisher _debug_pub;
  double _reprojection_threshold;
  double _distanceratio_threshold;
  double _th_step;
  double _phi_step;
  bool _autosize;
  double _err_thr;
  static std::vector<Matching_Template *> _templates;
  image_geometry::PinholeCameraModel pcam;
  bool pnod;
  bool _initialized;
  bool _viewer;

public:
  PointPoseExtractor() : it(ros::NodeHandle("~")) {
    // _sub = _n.subscribe("ImageFeature0D", 1,
    //                     &PointPoseExtractor::imagefeature_cb, this);
    _client = _n.serviceClient<posedetection_msgs::Feature0DDetect>("Feature0DDetect");
    _pub = _n.advertise<posedetection_msgs::ObjectDetection>("ObjectDetection", 10);
    _pub_agg = _n.advertise<posedetection_msgs::ObjectDetection>("ObjectDetection_agg", 10);
    _debug_pub = it.advertise("debug_image", 1);
    _server = _n.advertiseService("SetTemplate", &PointPoseExtractor::settemplate_cb, this);
    _initialized = false;
  }

  virtual ~PointPoseExtractor(){
    _sub.shutdown();
    _client.shutdown();
    _pub.shutdown();
    _pub_agg.shutdown();
  }

  static void make_template_from_mousecb(Matching_Template *mt){
    cv::Mat H;
    cv::Mat tmp_template, tmp_warp_template;
    std::vector<cv::Point2f>pt1, pt2;
    double width, height;
    std::string filename;
    std::cout << "input template's [width]" << std::endl;
    std::cin >> width;
    std::cout << "input template's [height]" << std::endl;
    std::cin >> height;
    std::cout << "input template's [filename]" << std::endl;
    std::cin >> filename;

    for (int i = 0; i < 4; i++){
      pt1.push_back(cv::Point2d((int)mt->_correspondances.at(i).x,
                                (int)mt->_correspondances.at(i).y + mt->_template_img.size().height));
    }
    cv::Rect rect = cv::boundingRect(cv::Mat(pt1));
    double scale = std::max(width, height) / 500.0;
    int iwidth = width / scale, iheight = height / scale;
    pt2.push_back(cv::Point2d(0,0));
    pt2.push_back(cv::Point2d(iwidth,0));
    pt2.push_back(cv::Point2d(iwidth,iheight));
    pt2.push_back(cv::Point2d(0,     iheight));
    H = cv::findHomography(cv::Mat(pt1), cv::Mat(pt2));

    cv::getRectSubPix(mt->_previous_stack_img, rect.size(),
                      cv::Point2f((rect.tl().x + rect.br().x)/2.0,(rect.tl().y + rect.br().y)/2.0),
                      tmp_template);
    cv::warpPerspective(mt->_previous_stack_img, tmp_warp_template, H, cv::Size(iwidth, iheight));

    try {
      cv::imwrite(filename,tmp_template);
      boost::filesystem::path fname(filename);
      std::stringstream ss;
      ss << fname.stem() << "_wrap" << fname.extension();
      cv::imwrite(ss.str(),tmp_warp_template);
    }catch (cv::Exception e) {
      std::cerr << e.what()  << std::endl;
    }

    for (int i = 0; i < (int)pt1.size(); i++){
      pt2.push_back(cv::Point2d((int)pt1.at(i).x - rect.x,
                                (int)pt1.at(i).y - rect.y - mt->_template_img.size().height));
    }
    // cv::Mat mask_img = cv::Mat::zeros(tmp_template.size(), CV_8UC3);
    // cv::fillConvexPoly(mask_img, pt2.begin(), (int)pt2.size(), CV_RGB(255, 255, 255));

    // cv::namedWindow("hoge", 1);
    // cv::imshow("hoge", mask_img);

    cv::Mat M = (cv::Mat_<double>(3,3) << 1,0,0, 0,1,0, 0,0,1);
    std::string window_name = "sample" + boost::lexical_cast<std::string>((int)_templates.size());

    Matching_Template* tmplt = 
      new Matching_Template (tmp_warp_template, "sample",
                             tmp_warp_template.size().width, tmp_warp_template.size().height,
                             width, height,
                             tf::Transform(tf::Quaternion(0, 0, 0, 1), tf::Vector3(0, 0, 0)),
                             M,
                             mt->_reprojection_threshold,
                             mt->_distanceratio_threshold,
                             _first_sample_change ? window_name : mt->_window_name,
                             cv::getWindowProperty(mt->_window_name, CV_WND_PROP_AUTOSIZE));

    mt->_correspondances.clear();
    _templates.push_back(tmplt);
    cv::namedWindow(_first_sample_change ? window_name : mt->_window_name,
                    cv::getWindowProperty(mt->_window_name, CV_WND_PROP_AUTOSIZE));
    cvSetMouseCallback (_first_sample_change ? window_name.c_str() : mt->_window_name.c_str(),
                        &cvmousecb, static_cast<void *>(_templates.back()));
    _first_sample_change = true;
  }

  static void cvmousecb (int event, int x, int y, int flags, void* param){
    Matching_Template *mt = (Matching_Template*)param;
    // std::cerr << "mousecb_ -> " << mt << std::endl;
    switch (event){
    case CV_EVENT_LBUTTONUP: {
      cv::Point2d pt(x,y - (int)mt->_template_img.size().height);
      ROS_INFO("add correspondence (%d, %d)", (int)pt.x, (int)pt.y);
      mt->_correspondances.push_back(pt);
      if ((int)mt->_correspondances.size() >= 4){
        make_template_from_mousecb(mt);
        mt->_correspondances.clear();
        ROS_INFO("reset");
      }
      break;
    }
    case CV_EVENT_RBUTTONUP: {
      mt->_correspondances.clear();
      ROS_INFO("reset");
      break;
    }
    }
  }


  void initialize () {
    std::string matching_frame;
    std::string _pose_str;
    double template_width;
    double template_height;
    std::string template_filename;
    std::string window_name;
    ros::NodeHandle local_nh("~");

    local_nh.param("child_frame_id", matching_frame, std::string("matching"));
    local_nh.param("object_width",  template_width,  0.06);
    local_nh.param("object_height", template_height, 0.0739);
    local_nh.param("relative_pose", _pose_str, std::string("0 0 0 0 0 0 1"));
    std::string default_template_file_name;
    try {
#ifdef ROSPACK_EXPORT
      rospack::ROSPack rp;
      rospack::Package *p = rp.get_pkg("jsk_perception");
      if (p!=NULL) default_template_file_name = p->path + std::string("/sample/opencv-logo2.png");
#else
      rospack::Rospack rp;
      std::vector<std::string> search_path;
      rp.getSearchPathFromEnv(search_path);
      rp.crawl(search_path, 1);
      std::string path;
      if (rp.find("jsk_perception",path)==true) default_template_file_name = path + std::string("/sample/opencv-logo2.png");
#endif
    } catch (std::runtime_error &e) {
    }
    local_nh.param("template_filename", template_filename, default_template_file_name);
    local_nh.param("reprojection_threshold", _reprojection_threshold, 3.0);
    local_nh.param("distanceratio_threshold", _distanceratio_threshold, 0.49);
    local_nh.param("error_threshold", _err_thr, 50.0);
    local_nh.param("theta_step", _th_step, 5.0);
    local_nh.param("phi_step", _phi_step, 5.0);
    local_nh.param("viewer_window", _viewer, true);
    local_nh.param("window_name", window_name, std::string("sample1"));
    local_nh.param("autosize", _autosize, false);
    local_nh.param("publish_null_object_detection", pnod, false);

    _first_sample_change = false;

    // make one template
    cv::Mat template_img;
    template_img = cv::imread (template_filename, 1);
    if ( template_img.empty()) {
      ROS_ERROR ("template picture <%s> cannot read. template picture is not found or uses unsuported format.", template_filename.c_str());
      return;
    }

    // relative pose
    std::vector<double> rv(7);
    std::istringstream iss(_pose_str);
    for(int i=0; i<7; i++)
      iss >> rv[i];
    tf::Transform transform(tf::Quaternion(rv[3],rv[4],rv[5],rv[6]),
                            tf::Vector3(rv[0], rv[1], rv[2]));

    // add the image to template list 
    add_new_template(template_img, window_name, transform,
                     template_width, template_height, _th_step, _phi_step);

  } // initialize


  cv::Mat make_homography(cv::Mat src, cv::Mat rvec, cv::Mat tvec,
                          double template_width, double template_height, cv::Size &size){

    cv::Point3f coner[4] = {cv::Point3f(-(template_width/2.0), -(template_height/2.0),0),
                            cv::Point3f(template_width/2.0,-(template_height/2.0),0),
                            cv::Point3f(template_width/2.0,template_height/2.0,0),
                            cv::Point3f(-(template_width/2.0),template_height/2.0,0)};
    cv::Mat coner_mat (cv::Size(4, 1), CV_32FC3, coner);
    std::vector<cv::Point2f> coner_img_points;

    cv::Mat zero_distortion_mat = cv::Mat::zeros(4, 1, CV_64FC1);
    cv::projectPoints(coner_mat, rvec, tvec,
                      pcam.projectionMatrix()(cv::Range::all(), cv::Range(0,3)),
                      zero_distortion_mat, // pcam.distortionCoeffs(),
                      coner_img_points);

    float x_min = 10000, x_max = 0;
    float y_min = 10000, y_max = 0;
    for (int i = 0; i < (int)coner_img_points.size(); i++){
      x_min = std::min(x_min, coner_img_points.at(i).x);
      x_max = std::max(x_max, coner_img_points.at(i).x);
      y_min = std::min(y_min, coner_img_points.at(i).y);
      y_max = std::max(y_max, coner_img_points.at(i).y);
    }

    std::vector<cv::Point2f> coner_img_points_trans;
    for (int i = 0; i < (int)coner_img_points.size(); i++){
      cv::Point2f pt_tmp(coner_img_points.at(i).x - x_min,
                         coner_img_points.at(i).y - y_min);
      coner_img_points_trans.push_back(pt_tmp);
    }

    cv::Point2f template_points[4] = {cv::Point2f(0,0),
                                      cv::Point2f(src.size().width,0),
                                      cv::Point2f(src.size().width,src.size().height),
                                      cv::Point2f(0,src.size().height)};
    cv::Mat template_points_mat (cv::Size(4, 1), CV_32FC2, template_points);

    size = cv::Size(x_max - x_min, y_max - y_min);
    return cv::findHomography(template_points_mat, cv::Mat(coner_img_points_trans), 0, 3);
  }


  int make_warped_images (cv::Mat src, std::vector<cv::Mat> &imgs,
                          std::vector<cv:: Mat> &Mvec,
                          double template_width, double template_height,
                          double th_step, double phi_step){

    std::vector<cv::Size> sizevec;

    for (int i = (int)((-3.14/4.0)/th_step); i*th_step < 3.14/4.0; i++){
      for (int j = (int)((-3.14/4.0)/phi_step); j*phi_step < 3.14/4.0; j++){
        double fR3[3], fT3[3];
        cv::Mat rvec(3, 1, CV_64FC1, fR3);
        cv::Mat tvec(3, 1, CV_64FC1, fT3);

        tf::Quaternion quat;
        quat.setEuler(0, th_step*i, phi_step*j);
        fR3[0] = quat.getAxis().x() * quat.getAngle();
        fR3[1] = quat.getAxis().y() * quat.getAngle();
        fR3[2] = quat.getAxis().z() * quat.getAngle();
        fT3[0] = 0;
        fT3[1] = 0;
        fT3[2] = 0.5;

        cv::Mat M;
        cv::Size size;
        M = make_homography(src, rvec, tvec, template_width, template_height, size);
        Mvec.push_back(M);
        sizevec.push_back(size);
      }
    }

    for (int i = 0; i < (int)Mvec.size(); i++){
      cv::Mat dst;
      cv::warpPerspective(src, dst, Mvec.at(i), sizevec.at(i),
                          CV_INTER_LINEAR, IPL_BORDER_CONSTANT, 0);
      imgs.push_back(dst);
    }
    return 0;
  }

  bool add_new_template(cv::Mat img, std::string typestr, tf::Transform relative_pose,
                        double template_width, double template_height,
                        double theta_step=5.0, double phi_step=5.0)
  {
    std::vector<cv::Mat> imgs;
    std::vector<cv::Mat> Mvec;
    make_warped_images(img, imgs, Mvec,
                       template_width, template_height, theta_step, phi_step);

    for (int i = 0; i < (int)imgs.size(); i++){
      std::string type = typestr;
      if(imgs.size() > 1) {
        char chr[20];
        sprintf(chr, "%d", i);
        type += "_" + std::string(chr);
      }

      Matching_Template * tmplt = 
        new Matching_Template(imgs.at(i), type,
                              img.size().width, img.size().height,
                              template_width, template_height,
                              relative_pose, Mvec.at(i),
                              _reprojection_threshold,
                              _distanceratio_threshold,
                              (_viewer ? type : ""), _autosize);
      _templates.push_back(tmplt);
      if( _viewer )
        cv::namedWindow(type, _autosize ? CV_WINDOW_AUTOSIZE : 0);
      cvSetMouseCallback (type.c_str(), &cvmousecb, static_cast<void *>(_templates.back()));
    }
    return true;
  }

  bool settemplate_cb (jsk_perception::SetTemplate::Request &req,
                       jsk_perception::SetTemplate::Response &res){
      cv_bridge::CvImagePtr cv_ptr;
      cv_ptr = cv_bridge::toCvCopy(req.image, enc::BGR8);
      cv::Mat img(cv_ptr->image);

      tf::Transform transform(tf::Quaternion(req.relativepose.orientation.x,
                                             req.relativepose.orientation.y,
                                             req.relativepose.orientation.z,
                                             req.relativepose.orientation.w),
                              tf::Vector3(req.relativepose.position.x,
                                          req.relativepose.position.y,
                                          req.relativepose.position.z));

      // add the image to template list 
      add_new_template(img, req.type, transform,
                       req.dimx, req.dimy, 1.0, 1.0);
      return true;
  }


  void imagefeature_cb (const posedetection_msgs::ImageFeature0DConstPtr& msg){
    std::vector<cv::KeyPoint> sourceimg_keypoints;
    cv::Mat sourceimg_descriptors;
    std::vector<posedetection_msgs::Object6DPose> vo6p;
    posedetection_msgs::ObjectDetection od;

    cv_bridge::CvImagePtr cv_ptr;
    cv_ptr = cv_bridge::toCvCopy(msg->image, enc::BGR8);
    cv::Mat src_img(cv_ptr->image);

    // from ros messages to keypoint and pin hole camera model
    features2keypoint (msg->features, sourceimg_keypoints, sourceimg_descriptors);
    pcam.fromCameraInfo(msg->info);

    if ( !_initialized ) {
      // make template images from camera info
      initialize();
      std::cerr << "initialize templates done" << std::endl;
      _initialized = true;
    }

    if ( sourceimg_keypoints.size () < 2 ) {
      ROS_INFO ("The number of keypoints in source image is less than 2");
    }
    else {
      // make KDTree
      cv::flann::Index *ft = new cv::flann::Index(sourceimg_descriptors, cv::flann::KDTreeIndexParams(1));

      // matching and detect object
      ROS_INFO("_templates size: %d", (int)_templates.size());
      for (int i = 0; i < (int)_templates.size(); i++){
        posedetection_msgs::Object6DPose o6p;

        cv::Mat debug_img;
        if (_templates.at(i)->estimate_od(_client, src_img, sourceimg_keypoints, pcam, _err_thr, debug_img, ft, &o6p))
          vo6p.push_back(o6p);

        // for debug Image topic
        cv_bridge::CvImage out_msg;
        out_msg.header   = msg->image.header;
        out_msg.encoding = "bgr8";
        out_msg.image    = debug_img;
        _debug_pub.publish(out_msg.toImageMsg());
      }
      delete ft;
      if (((int)vo6p.size() != 0) || pnod) {
        od.header.stamp = msg->image.header.stamp;
        od.header.frame_id = msg->image.header.frame_id;
        od.objects = vo6p;
        _pub.publish(od);
        _pub_agg.publish(od);
      }
    }
    // BOOST_FOREACH(Matching_Template* mt, _templates) {
    //   std::cerr << "templates_ -> " << mt << std::endl;
    // }
    cv::waitKey( 10 );
  }

  /* if there are subscribers of the output topic -> do work
         else if -> unregister all topics this node subscribing
   */
  void check_subscribers()
  {
        if(_pub.getNumSubscribers() == 0) {
          if(_sub)
                _sub.shutdown();
        } else {
          if(!_sub)
                _sub = _n.subscribe("ImageFeature0D", 1,
                                    &PointPoseExtractor::imagefeature_cb, this);
        }
  }

  /* callback for dynamic reconfigure */
  void dyn_conf_callback(jsk_perception::point_pose_extractorConfig &config,
                         uint32_t level) {
    std::cout << "id = " << config.template_id << std::endl;
    std::cout << "lvl = " << level << std::endl;
    if((int)_templates.size() <= config.template_id) {
      ROS_WARN("template_id is invalid");
      config.template_id = 0;
      if(_templates.size() != 0)
        config.frame_id = _templates[0]->_matching_frame;
    } else {
      Matching_Template* tmpl = _templates[config.template_id];
      if(config.frame_id == tmpl->_matching_frame) {
        ROS_WARN("update params");
        tmpl->_reprojection_threshold = config.reprojection_threshold;
        tmpl->_distanceratio_threshold = config.distanceratio_threshold;
        _err_thr = config.error_threshold;
      } else {
        ROS_WARN("get params");
        config.frame_id = tmpl->_matching_frame;
        config.reprojection_threshold = tmpl->_reprojection_threshold;
        config.distanceratio_threshold = tmpl->_distanceratio_threshold;
        config.error_threshold = _err_thr;
      }
    }
  }

};  // the end of definition of class PointPoseExtractor


std::vector<Matching_Template *> PointPoseExtractor::_templates;

int main (int argc, char **argv){
  ros::init (argc, argv, "PointPoseExtractor");

  PointPoseExtractor matcher;

  dynamic_reconfigure::Server<jsk_perception::point_pose_extractorConfig> server;
  dynamic_reconfigure::Server<jsk_perception::point_pose_extractorConfig>::CallbackType f;
  f = boost::bind(&PointPoseExtractor::dyn_conf_callback, &matcher, _1, _2);
  server.setCallback(f);

  ros::Rate r(10); // 10 hz
  while(ros::ok()) {
        ros::spinOnce();
        matcher.check_subscribers();
        r.sleep();
  }

  return 0;
}