ROS Package

Abstract 概要
The objective of the ROS package fingervision is to provide an easy-to-integrate utility of FingerVision processing programs. It is designed on the famous robotic middleware ROS. The processed data is sent as the ROS topics, and its control interface is provided as ROS services.
Table of contents 目次

Overview †

The ROS package unifies the marker tracking and proximity vision. It consists of a ROS node fv_core_node which takes USB video devices, video streams, and video files as input. Then the node processes the image sequence with the marker tracking and proximity vision algorithms. The computed results are published as ROS topics. The behavior of fv_core_node is controlled by ROS services. For example pausing and resuming the process.

fv_proc.png
↑

Collection of Packages †

There are two packages:

↑

Overview of fingervision †

The fingervision package has following directories:

↑

Installation †

Refer to Installation.

↑

ROS Node fv_core_node †

The code is fingervision/src/fv_core_node.cpp.

//-------------------------------------------------------------------------------------------
/*! \file    fv_core_node.cpp
    \brief   Computer vision for FingerVision.
             Improved marker (blob) tracking and proximity vision.
    \author  Akihiko Yamaguchi, info@akihikoy.net
    \version 0.1
    \date    Feb.19, 2017
    \version 0.2
    \date    Apr.1, 2018
             Removed stereo vision (independent from PCL; no point cloud output).
*/
//-------------------------------------------------------------------------------------------
#include "blob_tracker2.h"
#include "prox_vision.h"
#include "ay_vision/vision_util.h"
#include "ay_cpp/geom_util.h"
#include "ay_cpp/sys_util.h"
#include "ay_cpp/cpp_util.h"
//-------------------------------------------------------------------------------------------
#include "fingervision_msgs/BlobMoves.h"
#include "fingervision_msgs/ProxVision.h"
#include "fingervision_msgs/SetInt32.h"
#include "fingervision_msgs/SetString.h"
#include "fingervision_msgs/SetStringInt32.h"
// #include "fingervision_msgs/SetStringInt32Array.h"
#include "fingervision_msgs/TakeSnapshot.h"
//-------------------------------------------------------------------------------------------
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <ros/ros.h>
#include <std_msgs/Bool.h>
#include <std_srvs/Empty.h>
#include <std_msgs/Float32.h>
#include <image_transport/image_transport.h>
#include <cv_bridge/cv_bridge.h>
#include <camera_info_manager/camera_info_manager.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <map>
#include <algorithm>
#include <boost/thread.hpp>
#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <boost/shared_ptr.hpp>
//-------------------------------------------------------------------------------------------
namespace trick
{
bool Running(true), Shutdown(false);
std::string *CurrentWin(NULL);

/*FPS control parameters.
  FrameSkip: Video images is processed every 1+FrameSkip frames.
             FrameSkip=0: processing every frame.
  TargetFPS: Video image is processed at this FPS.
             TargetFPS=0: processing every frame.
  CaptureFPS: Image is captured at this FPS.
             CaptureFPS=0: capture as fast as possible.
  NOTE: Do not set FrameSkip and TargetFPS simultaneously, which would be confusing.
  Pseudo code:
    for each frame f:
      Capture frame;
      if(FrameSkip<=0 || f%(FrameSkip+1)==0)  Process;
    In Process:
      ros::Rate rate(TargetFPS)
      for each frame:
        rate.sleep()
  TODO:FIXME: Currently TargetFPS is not configurable during run time, but
    changing TargetFPS in execution is useful.
*/
int FrameSkip(0);  // 0: no skip
double TargetFPS(0);  // 0: no FPS control
double CaptureFPS(0);  // 0: no FPS control

std::string PkgDir(".");  // Base directory of this node.
std::string BlobCalibPrefix("blob_");
std::string ObjDetModelPrefix("objdet_");
std::string ConfigOut("out1.yaml");  // Default file to save the configuration.
std::vector<TCameraInfo> CamInfo;
std::vector<TBlobTracker2> BlobTracker;  // Marker tracker
std::vector<TObjDetTrackBSP> ObjDetTracker;  // Proximity vision
std::vector<TCameraRectifier> CamRectifier;

std::map<std::string, boost::shared_ptr<boost::mutex> > MutTracker;  // tracker: Mutex for tracker

std::map<std::string, TEasyVideoOut> VideoOut;
struct TShowTrackbars
{
  // bool Enabled;
  std::string Kind;
  int Mode;
  TShowTrackbars() : /*Enabled(false),*/ Mode(0) {}
};
std::map<std::string, TShowTrackbars> ShowTrackbars;

std::vector<ros::Publisher> BlobPub;  // Blob (marker) tracking publisher.
std::vector<ros::Publisher> PXVPub;  // Proximity-vision (object and slip detection) publisher.
std::vector<ros::Publisher> PXVObjDetModePub;  // Object-detection mode publisher.
ros::Publisher FPSBlobPub;  // FPS publisher of blob tracker.
ros::Publisher FPSPXVPub;  // FPS publisher of proximity-vision tracker.
std::vector<image_transport::Publisher> ImgPub;  // Image publisher [i_cam]
std::vector<cv::Mat> Frame;
std::vector<int64_t> CapTime;
std::vector<boost::shared_ptr<boost::mutex> > MutCamCapture;  // Mutex for capture
std::vector<boost::shared_ptr<boost::mutex> > MutFrameCopy;  // Mutex for Frame
struct TIMShowStuff
{
  boost::shared_ptr<boost::mutex> Mutex;
  cv::Mat Frame;
};
std::map<std::string, TIMShowStuff> IMShowStuff;

struct TWindowInfo
{
  int CamIdx;  // Camera index.
  std::string Kind;  // Kind of computer vision.
  int Index;  // Index of computer vision object (BlobTracker, ObjDetTracker).
  TWindowInfo()
    : CamIdx(-1), Kind(), Index(-1)  {}
  TWindowInfo(int cam_idx, const std::string &k, int idx)
    : CamIdx(cam_idx), Kind(k), Index(idx)  {}
};
std::map<std::string, TWindowInfo> WindowInfo;

bool WindowsHidden(false);
enum {
  wvrNone=0,
  wvrHide,
  wvrShow
} WindowVisibilityRequest(wvrNone);

// Dim-levels.
double DimLevels[]={0.0,0.3,0.7,1.0};
int DimIdxBT(3),DimIdxPV(1);

// Calibration and initialization request.
bool CalibrationRequest(false), TrackerInitRequest(false), TrackerInitReqFromTrackbar(false);
TWindowInfo CalibrationReqWinInfo, TrackerInitReqWinInfo;

}
//-------------------------------------------------------------------------------------------
using namespace std;
// using namespace boost;
using namespace trick;
//-------------------------------------------------------------------------------------------
// #define print(var) PrintContainer((var), #var"= ")
// #define print(var) std::cout<<#var"= "<<(var)<<std::endl
//-------------------------------------------------------------------------------------------

bool IsShutdown()
{
  return Shutdown || ros::isShuttingDown() || !ros::ok();
}
//-------------------------------------------------------------------------------------------

inline std::string CheckYAMLExistence(const std::string &filename)
{
  std::cerr<<"Loading from YAML: "<<filename<<std::endl;
  if(!FileExists(filename))
    std::cerr<<"!!!File not found: "<<filename<<std::endl;
  return filename;
}
//-------------------------------------------------------------------------------------------

inline std::vector<std::string> CheckYAMLExistence(const std::vector<std::string> &filenames)
{
  for(std::vector<std::string>::const_iterator fitr(filenames.begin()),fitr_end(filenames.end());
      fitr!=fitr_end; ++fitr)
    CheckYAMLExistence(*fitr);
  return filenames;
}
//-------------------------------------------------------------------------------------------

/*
  Right click: pause/resume
*/
void OnMouse(int event, int x, int y, int flags, void *data)
{
  if(event!=0)
  {
    CurrentWin= reinterpret_cast<std::string*>(data);
    std::cerr<<"CurrentWin: "<<*CurrentWin<<" (clicked at "<<x<<", "<<y<<")"<<std::endl;
  }

  if(event == cv::EVENT_RBUTTONDOWN && flags == 0)
  {
    Running=!Running;
    std::cerr<<(Running?"Resume":"Pause (Hit space/R-click to resume)")<<std::endl;
  }
  if((event == cv::EVENT_LBUTTONDOWN && (flags & cv::EVENT_FLAG_SHIFTKEY))
    || (event == cv::EVENT_RBUTTONDOWN && (flags & cv::EVENT_FLAG_SHIFTKEY)) )
  {
    bool to_add= (event == cv::EVENT_LBUTTONDOWN);
    if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="ObjDetTracker")
    {
      int i_cam(WindowInfo[*CurrentWin].CamIdx), idx(WindowInfo[*CurrentWin].Index);
      cv::Mat frame;
      {
        boost::mutex::scoped_lock lock(*MutFrameCopy[i_cam]);
        Frame[i_cam].copyTo(frame);
      }
      Preprocess(frame, CamInfo[i_cam], &CamRectifier[i_cam]);
      std::cerr<<"ObjDetTracker#"<<idx<<".";
      std::cerr<<(to_add ? "AddToModel" : "RemoveFromModel");
      std::cerr<<": Cam#"<<i_cam<<" "<<frame.size()<<" clicked("<<x<<","<<y<<") bgr="<<frame.at<cv::Vec3b>(y,x)<<std::endl;
      if(to_add)  ObjDetTracker[idx].AddToModel(frame, cv::Point(x,y));
      else        ObjDetTracker[idx].RemoveFromModel(frame, cv::Point(x,y));
    }
  }
  if(event == cv::EVENT_RBUTTONDOWN && (flags & cv::EVENT_FLAG_SHIFTKEY))
  {
    if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="BlobTracker")
    {
      int idx(WindowInfo[*CurrentWin].Index);
      BlobTracker[idx].RemovePointAt(cv::Point2f(x,y));
    }
  }
}
//-------------------------------------------------------------------------------------------

// return if continue
bool HandleKeyEvent()
{
  // keyboard interface:
  char c(cv::waitKey(1));
  if(c=='\x1b'||c=='q') return false;
  else if(c=='W')
  {
    for(std::map<std::string, TEasyVideoOut>::iterator itr(VideoOut.begin()),itr_end(VideoOut.end()); itr!=itr_end; ++itr)
      itr->second.Switch();
  }
  else if(c=='m' && CurrentWin!=NULL)
  {
    if(WindowInfo[*CurrentWin].Kind=="BlobTracker")
    {
      DimIdxBT++;
      if(DimIdxBT>=int(sizeof(DimLevels)/sizeof(DimLevels[0])))  DimIdxBT=0;
    }
    else if(WindowInfo[*CurrentWin].Kind=="ObjDetTracker")
    {
      DimIdxPV++;
      if(DimIdxPV>=int(sizeof(DimLevels)/sizeof(DimLevels[0])))  DimIdxPV=0;
    }
  }
  else if(c==' ')
  {
    Running=!Running;
    std::cerr<<(Running?"Resume":"Pause (Hit space/R-click to resume)")<<std::endl;
  }
  else if(c=='c')
  {
    if(CurrentWin!=NULL)
    {
      CalibrationRequest= true;
      CalibrationReqWinInfo= WindowInfo[*CurrentWin];
    }
  }
  else if(c=='i')
  {
    if(CurrentWin!=NULL)
    {
      TrackerInitRequest= true;
      TrackerInitReqWinInfo= WindowInfo[*CurrentWin];
    }
  }
  else if(c=='p')  // || c=='P'
  {
    if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="BlobTracker")
    {
      int idx(WindowInfo[*CurrentWin].Index);
      std::vector<TBlobTracker2Params> p;
      p.push_back(BlobTracker[idx].Params());
      std::string file_name((c=='p') ? "/dev/stdout" : "/tmp/blobtr_params.yaml");
      WriteToYAML(p,file_name.c_str());
      std::cerr<<"Parameters of the tracker are saved into "<<file_name<<std::endl;
    }
    else if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="ObjDetTracker")
    {
      int idx(WindowInfo[*CurrentWin].Index);
      std::vector<TObjDetTrackBSPParams> p;
      p.push_back(ObjDetTracker[idx].Params());
      std::string file_name((c=='p') ? "/dev/stdout" : "/tmp/objtr_params.yaml");
      WriteToYAML(p,file_name.c_str());
      std::cerr<<"Parameters of the tracker are saved into "<<file_name<<std::endl;
    }
  }
  else if(c=='P')  // Save all parameters into ConfigOut.
  {
    std::vector<TBlobTracker2Params> blobtrack_info(BlobTracker.size());
    for(int idx(0),idx_end(BlobTracker.size()); idx<idx_end; ++idx)
      blobtrack_info[idx]= BlobTracker[idx].Params();

    std::vector<TObjDetTrackBSPParams> objdettrack_info(ObjDetTracker.size());
    for(int idx(0),idx_end(ObjDetTracker.size()); idx<idx_end; ++idx)
      objdettrack_info[idx]= ObjDetTracker[idx].Params();

    cv::FileStorage fs(PathJoin(PkgDir,ConfigOut), cv::FileStorage::WRITE);
    WriteToYAML(blobtrack_info, "", &fs);
    WriteToYAML(objdettrack_info, "", &fs);
    fs.release();
    std::cerr<<"Parameters of the trackers are saved into "<<PathJoin(PkgDir,ConfigOut)<<std::endl;
  }
  else if(c=='r')
  {
    if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="ObjDetTracker")
    {
      int idx(WindowInfo[*CurrentWin].Index);
      ObjDetTracker[idx].ClearObject();
    }
  }
  else if(c=='d')
  {
    if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="ObjDetTracker")
    {
      int idx(WindowInfo[*CurrentWin].Index);
      if(ObjDetTracker[idx].ModeDetect())  ObjDetTracker[idx].StopDetect();
      else                                 ObjDetTracker[idx].StartDetect();
      std::cerr<<"Object detection mode is: "<<(ObjDetTracker[idx].ModeDetect()?"on":"off")<<std::endl;
    }
  }
  else if(c=='s')
  {
    if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="BlobTracker")
    {
      int i_cam(WindowInfo[*CurrentWin].CamIdx), idx(WindowInfo[*CurrentWin].Index);
      std::cerr<<"Saving calibration data of "<<BlobTracker[idx].Name<<" to "<<PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
      BlobTracker[idx].SaveCalib(PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml"));
    }
    else if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="ObjDetTracker")
    {
      int i_cam(WindowInfo[*CurrentWin].CamIdx), idx(WindowInfo[*CurrentWin].Index);
      std::cerr<<"Saving BG+Object models of "<<ObjDetTracker[idx].Name<<" to "<<PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
      ObjDetTracker[idx].SaveBGObjModels(PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml"));
    }
  }
  else if(c=='l')
  {
    if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="BlobTracker")
    {
      int i_cam(WindowInfo[*CurrentWin].CamIdx), idx(WindowInfo[*CurrentWin].Index);
      std::cerr<<"Loading calibration data of "<<BlobTracker[idx].Name<<" from "<<PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
      BlobTracker[idx].LoadCalib(PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml"));
    }
    else if(CurrentWin!=NULL && WindowInfo[*CurrentWin].Kind=="ObjDetTracker")
    {
      int i_cam(WindowInfo[*CurrentWin].CamIdx), idx(WindowInfo[*CurrentWin].Index);
      std::cerr<<"Loading BG+Object models of "<<ObjDetTracker[idx].Name<<" from "<<PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
      ObjDetTracker[idx].LoadBGObjModels(PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml"));
    }
  }
  else if(c=='C' && CurrentWin!=NULL && !WindowsHidden)
  {
    cv::destroyWindow(*CurrentWin);
    cv::namedWindow(*CurrentWin,1);
    if(ShowTrackbars[*CurrentWin].Kind=="BlobTracker")
    {
      int idx(WindowInfo[*CurrentWin].Index);
      ++ShowTrackbars[*CurrentWin].Mode;
      CreateTrackbars(*CurrentWin, BlobTracker[idx].Params(), ShowTrackbars[*CurrentWin].Mode, TrackerInitReqFromTrackbar);
    }
    else if(ShowTrackbars[*CurrentWin].Kind=="ObjDetTracker")
    {
      int idx(WindowInfo[*CurrentWin].Index);
      ++ShowTrackbars[*CurrentWin].Mode;
      CreateTrackbars(*CurrentWin, ObjDetTracker[idx].Params(), ShowTrackbars[*CurrentWin].Mode, TrackerInitReqFromTrackbar);
    }
    cv::setMouseCallback(*CurrentWin, OnMouse, CurrentWin);
  }

  return true;
}
//-------------------------------------------------------------------------------------------

bool Pause(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  std::cerr<<"Paused..."<<std::endl;
  Running= false;
  return true;
}
//-------------------------------------------------------------------------------------------

bool Resume(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  std::cerr<<"Resumed..."<<std::endl;
  Running= true;
  return true;
}
//-------------------------------------------------------------------------------------------

bool ShowWindows(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  std::cerr<<"Showing windows..."<<std::endl;
  WindowVisibilityRequest= wvrShow;
  return true;
}
//-------------------------------------------------------------------------------------------

bool HideWindows(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  std::cerr<<"Hiding windows..."<<std::endl;
  WindowVisibilityRequest= wvrHide;
  return true;
}
//-------------------------------------------------------------------------------------------

bool StartRecord(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  for(std::map<std::string, TEasyVideoOut>::iterator itr(VideoOut.begin()),itr_end(VideoOut.end()); itr!=itr_end; ++itr)
    itr->second.Rec();
  return true;
}
//-------------------------------------------------------------------------------------------

bool StopRecord(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  for(std::map<std::string, TEasyVideoOut>::iterator itr(VideoOut.begin()),itr_end(VideoOut.end()); itr!=itr_end; ++itr)
    itr->second.Stop();
  return true;
}
//-------------------------------------------------------------------------------------------

void SetVideoPrefix(const std::string &file_prefix)
{
  for(int j(0),j_end(BlobTracker.size());j<j_end;++j)
  {
    VideoOut[BlobTracker[j].Name].SetfilePrefix(file_prefix+BlobTracker[j].Name);
    VideoOut[BlobTracker[j].Name+"-orig"].SetfilePrefix(file_prefix+BlobTracker[j].Name+"-orig");
  }
  for(int j(0),j_end(ObjDetTracker.size());j<j_end;++j)
  {
    VideoOut[ObjDetTracker[j].Name].SetfilePrefix(file_prefix+ObjDetTracker[j].Name);
    VideoOut[ObjDetTracker[j].Name+"-orig"].SetfilePrefix(file_prefix+ObjDetTracker[j].Name+"-orig");
  }
}
//-------------------------------------------------------------------------------------------

bool SetVideoPrefix(fingervision_msgs::SetString::Request &req, fingervision_msgs::SetString::Response &res)
{
  std::cerr<<"Setting video prefix as "<<req.data<<"..."<<std::endl;
  SetVideoPrefix(req.data);
  res.result= true;
  return true;
}
//-------------------------------------------------------------------------------------------

bool SetFrameSkip(fingervision_msgs::SetInt32::Request &req, fingervision_msgs::SetInt32::Response &res)
{
  std::cerr<<"Setting frame skip as "<<req.data<<"..."<<std::endl;
  FrameSkip= req.data;
  res.result= true;
  return true;
}
//-------------------------------------------------------------------------------------------

bool TakeSnapshot(fingervision_msgs::TakeSnapshot::Request &req, fingervision_msgs::TakeSnapshot::Response &res)
{
  res.files.clear();
  std::string filename, timestamp;
  cv::Mat frame;
  int64_t t_cap(0);
  for(int i_cam(0), i_cam_end(CamInfo.size()); i_cam<i_cam_end; ++i_cam)
  {
    {
      boost::mutex::scoped_lock lock(*MutFrameCopy[i_cam]);
      Frame[i_cam].copyTo(frame);
      t_cap= CapTime[i_cam];
    }
    Preprocess(frame, CamInfo[i_cam], &CamRectifier[i_cam]);
    std::stringstream ss;
    ss<<t_cap;
    timestamp= ss.str();
    {
      filename= req.prefix+"-"+CamInfo[i_cam].Name+"-"+timestamp+req.ext;
      cv::imwrite(filename, frame);
      res.files.push_back(filename);
      std::cerr<<"Saved a snapshot: "<<filename<<std::endl;
    }
  }
  return true;
}
//-------------------------------------------------------------------------------------------

bool StopDetectObj(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  std::cerr<<"Stopping object detection..."<<std::endl;
  for(int j(0),j_end(ObjDetTracker.size());j<j_end;++j)
    ObjDetTracker[j].StopDetect();
  return true;
}
//-------------------------------------------------------------------------------------------

bool StartDetectObj(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  std::cerr<<"Starting object detection..."<<std::endl;
  for(int j(0),j_end(ObjDetTracker.size());j<j_end;++j)
    ObjDetTracker[j].StartDetect();
  return true;
}
//-------------------------------------------------------------------------------------------

bool ClearObj(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res)
{
  std::cerr<<"Clearing object models..."<<std::endl;
  for(int j(0),j_end(ObjDetTracker.size());j<j_end;++j)
    ObjDetTracker[j].ClearObject();
  return true;
}
//-------------------------------------------------------------------------------------------

bool ReqCalibrate(fingervision_msgs::SetStringInt32::Request &req, fingervision_msgs::SetStringInt32::Response &res)
{
  const std::string &kind(req.data_s);
  const int &idx(req.data_i), i_cam(idx);
  if(kind=="BlobTracker"
    || kind=="ObjDetTracker")
  {
    std::cerr<<"Calibration requested: "<<kind<<"-"<<idx<<std::endl;
    CalibrationRequest= true;
    CalibrationReqWinInfo.Kind= kind;
    CalibrationReqWinInfo.CamIdx= i_cam;
    CalibrationReqWinInfo.Index= idx;
    res.result= true;
  }
  else
  {
    std::cerr<<"Invalid kind of the calibration requested: "<<kind<<"-"<<idx<<std::endl;
    res.result= false;
  }
  return true;
}
//-------------------------------------------------------------------------------------------

bool ReqInitialize(fingervision_msgs::SetStringInt32::Request &req, fingervision_msgs::SetStringInt32::Response &res)
{
  const std::string &kind(req.data_s);
  const int &idx(req.data_i), i_cam(idx);
  if(kind=="BlobTracker"
    || kind=="ObjDetTracker")
  {
    std::cerr<<"Initialization requested: "<<kind<<"-"<<idx<<std::endl;
    TrackerInitRequest= true;
    TrackerInitReqWinInfo.Kind= kind;
    TrackerInitReqWinInfo.CamIdx= i_cam;
    TrackerInitReqWinInfo.Index= idx;
    res.result= true;
  }
  else
  {
    std::cerr<<"Invalid kind of the initialization requested: "<<kind<<"-"<<idx<<std::endl;
    res.result= false;
  }
  return true;
}
//-------------------------------------------------------------------------------------------

bool SetDimLevel(fingervision_msgs::SetStringInt32::Request &req, fingervision_msgs::SetStringInt32::Response &res)
{
  const std::string &kind(req.data_s);
  int dim_idx(req.data_i), dim_level_len(sizeof(DimLevels)/sizeof(DimLevels[0]));
  if(dim_idx<0)  dim_idx= 0;
  if(dim_idx>=dim_level_len)  dim_idx= dim_level_len-1;
  std::cerr<<"SetDimLevel: "<<kind<<":"<<dim_idx<<std::endl;
  if(kind=="BlobTracker")
  {
    DimIdxBT= dim_idx;
    res.result= true;
  }
  else if(kind=="ObjDetTracker")
  {
    DimIdxPV= dim_idx;
    res.result= true;
  }
  else
  {
    std::cerr<<"Invalid kind: "<<kind<<std::endl;
    res.result= false;
  }
  return true;
}
//-------------------------------------------------------------------------------------------

bool SetTrackbarMode(fingervision_msgs::SetStringInt32::Request &req, fingervision_msgs::SetStringInt32::Response &res)
{
  const std::string &kind(req.data_s);
  const int &mode(req.data_i);
  std::cerr<<"SetTrackbarMode: "<<kind<<":"<<mode<<std::endl;
  if(kind=="BlobTracker")
  {
    for(int it(0),it_end(BlobTracker.size()); it!=it_end; ++it)
    {
      std::string &win_name(BlobTracker[it].Name);
      if(ShowTrackbars[win_name].Mode!=mode)
      {
        cv::destroyWindow(win_name);
        cv::namedWindow(win_name,1);
        ShowTrackbars[win_name].Mode= mode;
        CreateTrackbars(win_name, BlobTracker[it].Params(), ShowTrackbars[win_name].Mode, TrackerInitReqFromTrackbar);
        cv::setMouseCallback(win_name, OnMouse, &win_name);
      }
    }
    res.result= true;
  }
  else if(kind=="ObjDetTracker")
  {
    for(int it(0),it_end(ObjDetTracker.size()); it!=it_end; ++it)
    {
      std::string &win_name(ObjDetTracker[it].Name);
      if(ShowTrackbars[win_name].Mode!=mode)
      {
        cv::destroyWindow(win_name);
        cv::namedWindow(win_name,1);
        ShowTrackbars[win_name].Mode= mode;
        CreateTrackbars(win_name, ObjDetTracker[it].Params(), ShowTrackbars[win_name].Mode, TrackerInitReqFromTrackbar);
        cv::setMouseCallback(win_name, OnMouse, &win_name);
      }
    }
    res.result= true;
  }
  else
  {
    std::cerr<<"Invalid kind: "<<kind<<std::endl;
    res.result= false;
  }
  return true;
}
//-------------------------------------------------------------------------------------------

bool SaveParameters(fingervision_msgs::SetString::Request &req, fingervision_msgs::SetString::Response &res)
{
  std::string file_name;
  if(req.data=="")  file_name= PathJoin(PkgDir,ConfigOut);
  else              file_name= PathJoin(PkgDir,req.data);

  std::vector<TBlobTracker2Params> blobtrack_info(BlobTracker.size());
  for(int idx(0),idx_end(BlobTracker.size()); idx<idx_end; ++idx)
    blobtrack_info[idx]= BlobTracker[idx].Params();

  std::vector<TObjDetTrackBSPParams> objdettrack_info(ObjDetTracker.size());
  for(int idx(0),idx_end(ObjDetTracker.size()); idx<idx_end; ++idx)
    objdettrack_info[idx]= ObjDetTracker[idx].Params();

  cv::FileStorage fs(file_name, cv::FileStorage::WRITE);
  WriteToYAML(blobtrack_info, "", &fs);
  WriteToYAML(objdettrack_info, "", &fs);
  fs.release();
  std::cerr<<"Parameters of the trackers are saved into "<<file_name<<std::endl;
  res.result= true;
  return true;
}
//-------------------------------------------------------------------------------------------

bool LoadParameters(fingervision_msgs::SetString::Request &req, fingervision_msgs::SetString::Response &res)
{
  std::vector<std::string> file_names;
  file_names= CheckYAMLExistence(PathJoin(PkgDir,SplitString(req.data)));
  std::cerr<<"Loading parameters of the trackers from:"<<std::endl;
  for(std::vector<std::string>::const_iterator itr(file_names.begin()),itr_end(file_names.end());
      itr!=itr_end; ++itr)
    std::cerr<<"  - "<<*itr<<std::endl;

  std::vector<TBlobTracker2Params> blobtrack_info;
  std::vector<TObjDetTrackBSPParams> objdettrack_info;
  // ReadFromYAML(CamInfo, file_names);
  ReadFromYAML(blobtrack_info, file_names);
  ReadFromYAML(objdettrack_info, file_names);
  for(int idx(0),idx_end(std::min(blobtrack_info.size(),BlobTracker.size())); idx<idx_end; ++idx)
  {
    boost::mutex::scoped_lock lock(*MutTracker[BlobTracker[idx].Name]);
    BlobTracker[idx].Params()= blobtrack_info[idx];
    BlobTracker[idx].Init();
  }
  for(int idx(0),idx_end(std::min(objdettrack_info.size(),ObjDetTracker.size())); idx<idx_end; ++idx)
  {
    boost::mutex::scoped_lock lock(*MutTracker[ObjDetTracker[idx].Name]);
    ObjDetTracker[idx].Params()= objdettrack_info[idx];
    ObjDetTracker[idx].Init();
  }
  res.result= true;
  return true;
}
//-------------------------------------------------------------------------------------------

bool SaveCalibration(fingervision_msgs::SetStringInt32::Request &req, fingervision_msgs::SetStringInt32::Response &res)
{
  const std::string &kind(req.data_s);
  const int &idx(req.data_i), i_cam(idx);
  if(kind=="BlobTracker")
  {
    std::cerr<<"Saving calibration data of "<<BlobTracker[idx].Name<<" to "<<PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
    BlobTracker[idx].SaveCalib(PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml"));
    res.result= true;
  }
  else if(kind=="ObjDetTracker")
  {
    std::cerr<<"Saving BG+Object models of "<<ObjDetTracker[idx].Name<<" to "<<PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
    ObjDetTracker[idx].SaveBGObjModels(PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml"));
    res.result= true;
  }
  else
  {
    std::cerr<<"Invalid kind: "<<kind<<std::endl;
    res.result= false;
  }
  return true;
}
//-------------------------------------------------------------------------------------------

bool LoadCalibration(fingervision_msgs::SetStringInt32::Request &req, fingervision_msgs::SetStringInt32::Response &res)
{
  const std::string &kind(req.data_s);
  const int &idx(req.data_i), i_cam(idx);
  if(kind=="BlobTracker")
  {
    std::cerr<<"Loading calibration data of "<<BlobTracker[idx].Name<<" from "<<PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
    boost::mutex::scoped_lock lock(*MutTracker[BlobTracker[idx].Name]);
    BlobTracker[idx].LoadCalib(PathJoin(PkgDir,BlobCalibPrefix+CamInfo[i_cam].Name+".yaml"));
    res.result= true;
  }
  else if(kind=="ObjDetTracker")
  {
    std::cerr<<"Loading BG+Object models of "<<ObjDetTracker[idx].Name<<" from "<<PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml")<<std::endl;
    boost::mutex::scoped_lock lock(*MutTracker[ObjDetTracker[idx].Name]);
    ObjDetTracker[idx].LoadBGObjModels(PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[i_cam].Name+".yaml"));
    res.result= true;
  }
  else
  {
    std::cerr<<"Invalid kind: "<<kind<<std::endl;
    res.result= false;
  }
  return true;
}
//-------------------------------------------------------------------------------------------

void ExecBlobTrack(int i_cam)
{
  TCameraInfo &info(CamInfo[i_cam]);
  TBlobTracker2 &tracker(BlobTracker[i_cam]);
  boost::mutex &mut_tracker(*MutTracker[tracker.Name]);
  cv::Mat frame;
  int64_t t_cap(0);
  ros::Rate rate(TargetFPS>0.0?TargetFPS:1);
  for(int seq(0); !Shutdown; ++seq)
  {
    if(Running)
    {
      boost::mutex::scoped_lock lock(mut_tracker);

      if(TrackerInitRequest
        && TrackerInitReqWinInfo.Kind=="BlobTracker"
        && TrackerInitReqWinInfo.CamIdx==i_cam
        && TrackerInitReqWinInfo.Index==i_cam)
      {
        tracker.Init();
        TrackerInitRequest= false;
      }
      if(TrackerInitReqFromTrackbar && BlobTracker.size()>0 && CurrentWin!=NULL
        && WindowInfo[*CurrentWin].Kind=="BlobTracker"
        && WindowInfo[*CurrentWin].CamIdx==i_cam
        && WindowInfo[*CurrentWin].Index==i_cam)
      {
        tracker.Init();
        TrackerInitReqFromTrackbar= false;
      }

      if(CapTime[i_cam]==t_cap)
      {
        usleep(10*1000);
        continue;
      }
      if(TargetFPS>0.0)  rate.sleep();

      {
        boost::mutex::scoped_lock lock(*MutFrameCopy[i_cam]);
        Frame[i_cam].copyTo(frame);
        t_cap= CapTime[i_cam];
      }
      VideoOut[tracker.Name+"-orig"].Step(frame);  // Record original video

      Preprocess(frame, info, &CamRectifier[i_cam]);
      tracker.Step(frame);
      frame*= DimLevels[DimIdxBT];
      tracker.Draw(frame);

      VideoOut[tracker.Name].Step(frame);
      VideoOut[tracker.Name].VizRec(frame);

      {
        // cv::imshow(info.Name, frame);
        boost::mutex::scoped_lock lock(*IMShowStuff[tracker.Name].Mutex);
        frame.copyTo(IMShowStuff[tracker.Name].Frame);
      }

      // Publish as BlobMoves
      {
        const std::vector<TPointMove2> &data(tracker.Data());
        fingervision_msgs::BlobMoves blob_moves;
        blob_moves.header.seq= seq;
        blob_moves.header.stamp= ros::Time::now();
        blob_moves.header.frame_id= info.Name;
        blob_moves.camera_index= i_cam;
        blob_moves.camera_name= info.Name;
        blob_moves.width= info.Width;
        blob_moves.height= info.Height;
        blob_moves.data.resize(data.size());
        int i(0);
        for(std::vector<TPointMove2>::const_iterator itr(data.begin()),itr_end(data.end()); itr!=itr_end; ++itr,++i)
        {
          fingervision_msgs::BlobMove &m(blob_moves.data[i]);
          m.Pox= itr->Po.x;
          m.Poy= itr->Po.y;
          m.So = itr->So;
          m.DPx= itr->DP.x;
          m.DPy= itr->DP.y;
          m.DS = itr->DS;
        }
        BlobPub[i_cam].publish(blob_moves);
      }
      // usleep(10*1000);
    }  // Running
    else
    {
      usleep(200*1000);
    }
    usleep(100);  // short wait for mutex(mut_tracker).
  }
}
//-------------------------------------------------------------------------------------------

void ExecObjDetTrack(int i_cam)
{
  TCameraInfo &info(CamInfo[i_cam]);
  TObjDetTrackBSP &tracker(ObjDetTracker[i_cam]);
  boost::mutex &mut_tracker(*MutTracker[tracker.Name]);
  cv::Mat frame;
  int64_t t_cap(0);
  ros::Rate rate(TargetFPS>0.0?TargetFPS:1);
  for(int seq(0); !Shutdown; ++seq)
  {
    if(Running)
    {
      boost::mutex::scoped_lock lock(mut_tracker);

      if(TrackerInitRequest
        && TrackerInitReqWinInfo.Kind=="ObjDetTracker"
        && TrackerInitReqWinInfo.CamIdx==i_cam
        && TrackerInitReqWinInfo.Index==i_cam)
      {
        tracker.Init();
        TrackerInitRequest= false;
      }
      if(TrackerInitReqFromTrackbar && ObjDetTracker.size()>0 && CurrentWin!=NULL
        && WindowInfo[*CurrentWin].Kind=="ObjDetTracker"
        && WindowInfo[*CurrentWin].CamIdx==i_cam
        && WindowInfo[*CurrentWin].Index==i_cam)
      {
        tracker.Init();
        TrackerInitReqFromTrackbar= false;
      }

      if(CapTime[i_cam]==t_cap)
      {
        usleep(10*1000);
        continue;
      }
      if(TargetFPS>0.0)  rate.sleep();

      {
        boost::mutex::scoped_lock lock(*MutFrameCopy[i_cam]);
        Frame[i_cam].copyTo(frame);
        t_cap= CapTime[i_cam];
      }
      VideoOut[tracker.Name+"-orig"].Step(frame);  // Record original video

      Preprocess(frame, info, &CamRectifier[i_cam]);
      tracker.Step(frame);
      frame*= DimLevels[DimIdxPV];
      tracker.Draw(frame);

      VideoOut[tracker.Name].Step(frame);
      VideoOut[tracker.Name].VizRec(frame);

      {
        // cv::imshow(info.Name, frame);
        boost::mutex::scoped_lock lock(*IMShowStuff[tracker.Name].Mutex);
        frame.copyTo(IMShowStuff[tracker.Name].Frame);
      }

      // Publish as PXVPub
      {
        const cv::Mat &objs(tracker.ObjS()), &mvs(tracker.MvS());
        const cv::Moments &om(tracker.ObjMoments());
        fingervision_msgs::ProxVision prox_vision;
        prox_vision.header.seq= seq;
        prox_vision.header.stamp= ros::Time::now();
        prox_vision.header.frame_id= info.Name;
        prox_vision.camera_index= i_cam;
        prox_vision.camera_name= info.Name;
        prox_vision.width= info.Width;
        prox_vision.height= info.Height;

        double m[]= {om.m00, om.m10, om.m01, om.m20, om.m11, om.m02, om.m30, om.m21, om.m12, om.m03};
        std::vector<float> vm(m,m+10);
        prox_vision.ObjM_m= vm;

        double mu[]= {om.mu20, om.mu11, om.mu02, om.mu30, om.mu21, om.mu12, om.mu03};
        std::vector<float> vmu(mu,mu+7);
        prox_vision.ObjM_mu= vmu;

        double nu[]= {om.nu20, om.nu11, om.nu02, om.nu30, om.nu21, om.nu12, om.nu03};
        std::vector<float> vnu(nu,nu+7);
        prox_vision.ObjM_nu= vnu;

        prox_vision.ObjS.resize(objs.rows*objs.cols);
        for(int r(0),rend(objs.rows),i(0);r<rend;++r) for(int c(0),cend(objs.cols);c<cend;++c,++i)
          prox_vision.ObjS[i]= objs.at<float>(r,c);

        prox_vision.MvS.resize(mvs.rows*mvs.cols);
        for(int r(0),rend(mvs.rows),i(0);r<rend;++r) for(int c(0),cend(mvs.cols);c<cend;++c,++i)
          prox_vision.MvS[i]= mvs.at<float>(r,c);

        PXVPub[i_cam].publish(prox_vision);
      }
      {
        std_msgs::Bool pxv_obj_detection;
        pxv_obj_detection.data= tracker.ModeDetect();
        PXVObjDetModePub[i_cam].publish(pxv_obj_detection);
      }
      // usleep(10*1000);
    }  // Running
    else
    {
      usleep(200*1000);
    }
    usleep(100);  // short wait for mutex(mut_tracker).
  }
}
//-------------------------------------------------------------------------------------------

void ExecImgPublisher(int i_cam)
{
  TCameraInfo &info(CamInfo[i_cam]);
  cv::Mat frame;
  int64_t t_cap(0);
  ros::Rate rate(TargetFPS>0.0?TargetFPS:1);
  for(int seq(0); !Shutdown; ++seq)
  {
    if(Running)
    {
      if(CapTime[i_cam]==t_cap)
      {
        usleep(10*1000);
        continue;
      }
      if(TargetFPS>0.0)  rate.sleep();

      {
        boost::mutex::scoped_lock lock(*MutFrameCopy[i_cam]);
        Frame[i_cam].copyTo(frame);
        t_cap= CapTime[i_cam];
      }

      Preprocess(frame, info, &CamRectifier[i_cam]);

      // Publish image
      {
        std_msgs::Header header;
        header.stamp= ros::Time::now();
        header.frame_id= info.Name;
        ImgPub[i_cam].publish( cv_bridge::CvImage(header, "bgr8", frame).toImageMsg() );
      }
      // usleep(10*1000);
    }  // Running
    else
    {
      usleep(200*1000);
    }
  }
}
//-------------------------------------------------------------------------------------------

cv::Mat Capture(cv::VideoCapture &cap, int i_cam, bool auto_reopen=true)
{
  TCameraInfo &info(CamInfo[i_cam]);
  cv::Mat frame;
  {
    boost::mutex::scoped_lock lock(*MutCamCapture[i_cam]);
    while(!cap.read(frame))
    {
      if(!auto_reopen || IsShutdown()
        || !CapWaitReopen(info,cap,/*ms_wait=*/1000,/*max_count=*/0,/*check_to_stop=*/IsShutdown))
        return cv::Mat();
    }
  }
  return frame;
}
//-------------------------------------------------------------------------------------------

// Capture a sequence of images.
std::vector<cv::Mat> CaptureSeq(cv::VideoCapture &cap, int i_cam, int num)
{
  std::vector<cv::Mat> frames;
  for(int i(0); i<num; ++i)
    frames.push_back(Capture(cap, i_cam));
  return frames;
}
//-------------------------------------------------------------------------------------------

bool DisplayImages();

void ExecImgCapture(std::vector<cv::VideoCapture> &cap, bool camera_auto_reopen, bool disp_images, bool handle_key_event)
{
  int show_fps(0);
  ros::Rate rate(CaptureFPS>0.0?CaptureFPS:1);
  for(int f(0);!IsShutdown();++f)
  {
    if(Running)
    {
      // Capture from cameras:
      for(int i_cam(0), i_cam_end(CamInfo.size()); i_cam<i_cam_end; ++i_cam)
      {
        cv::Mat frame= Capture(cap[i_cam], i_cam, camera_auto_reopen);
        if(frame.empty())  Shutdown=true;
        if(FrameSkip<=0 || f%(FrameSkip+1)==0)
        {
          boost::mutex::scoped_lock lock(*MutFrameCopy[i_cam]);
          Frame[i_cam]= frame;
          CapTime[i_cam]= GetCurrentTimeL();
        }
      }
      if(IsShutdown())  break;

      // NOTE: In case ExecImgCapture is executed as a thread,
      // DisplayImages / cv::imshow should not be performed here but be called from the main thread.
      if(disp_images)  DisplayImages();


      // Handle blob tracker calibration request
      if(CalibrationRequest && BlobTracker.size()>0 && CalibrationReqWinInfo.Kind=="BlobTracker")
      {
        int i_cam(CalibrationReqWinInfo.CamIdx), idx(CalibrationReqWinInfo.Index);
        boost::mutex::scoped_lock lock(*MutTracker[BlobTracker[idx].Name]);
        std::vector<cv::Mat> frames= CaptureSeq(cap[i_cam], i_cam, BlobTracker[idx].Params().NCalibPoints);
        for(int i_frame(0),i_frame_end(frames.size()); i_frame<i_frame_end; ++i_frame)
          Preprocess(frames[i_frame], CamInfo[i_cam], &CamRectifier[i_cam]);
        BlobTracker[idx].Calibrate(frames);
      }
      if(CalibrationRequest && ObjDetTracker.size()>0 && CalibrationReqWinInfo.Kind=="ObjDetTracker")
      {
        int i_cam(CalibrationReqWinInfo.CamIdx), idx(CalibrationReqWinInfo.Index);
        boost::mutex::scoped_lock lock(*MutTracker[ObjDetTracker[idx].Name]);
        std::vector<cv::Mat> frames= CaptureSeq(cap[i_cam], i_cam, ObjDetTracker[idx].Params().NCalibBGFrames);
        for(int i_frame(0),i_frame_end(frames.size()); i_frame<i_frame_end; ++i_frame)
          Preprocess(frames[i_frame], CamInfo[i_cam], &CamRectifier[i_cam]);
        ObjDetTracker[idx].CalibBG(frames);
      }
      CalibrationRequest= false;

      // usleep(10*1000);
      if(show_fps==0)
      {
        std::cerr<<"FPS: "<<VideoOut.begin()->second.FPS()<<std::endl;
        show_fps=VideoOut.begin()->second.FPS()*4;
      }
      --show_fps;
      if(BlobTracker.size()>0)
      {
        float fps_blob(0.0);
        for(int j(0),j_end(BlobTracker.size());j<j_end;++j)
          fps_blob+= VideoOut[BlobTracker[j].Name].FPS();
        fps_blob/= float(BlobTracker.size());
        std_msgs::Float32 msg;
        msg.data= fps_blob;
        FPSBlobPub.publish(msg);
      }
      if(ObjDetTracker.size()>0)
      {
        float fps_pxv(0.0);
        for(int j(0),j_end(ObjDetTracker.size());j<j_end;++j)
          fps_pxv+= VideoOut[ObjDetTracker[j].Name].FPS();
        fps_pxv/= float(ObjDetTracker.size());
        std_msgs::Float32 msg;
        msg.data= fps_pxv;
        FPSPXVPub.publish(msg);
      }

      if(CaptureFPS>0.0)  rate.sleep();

    }  // Running
    else
    {
      usleep(200*1000);
    }

    if(handle_key_event && !HandleKeyEvent())  break;

    ros::spinOnce();
  }
  Shutdown= true;
}
//-------------------------------------------------------------------------------------------

// Handle the window visibility request and return if the windows are visible.
bool HandleWindowVisibilityRequest()
{
  if(!WindowsHidden && WindowVisibilityRequest==wvrHide)
  {
    for(std::map<std::string, TIMShowStuff>::const_iterator itr(IMShowStuff.begin()),itr_end(IMShowStuff.end()); itr!=itr_end; ++itr)
      cv::destroyWindow(itr->first);
    WindowsHidden= true;
  }
  if(WindowsHidden && WindowVisibilityRequest==wvrShow)
  {
    for(std::map<std::string, TIMShowStuff>::const_iterator itr(IMShowStuff.begin()),itr_end(IMShowStuff.end()); itr!=itr_end; ++itr)
    {
      std::string &window_name(const_cast<std::string&>(itr->first));
      cv::namedWindow(window_name,1);
      cv::setMouseCallback(window_name, OnMouse, &window_name);
    }
    WindowsHidden= false;
  }
  WindowVisibilityRequest= wvrNone;
  return !WindowsHidden;
}
//-------------------------------------------------------------------------------------------

// Handle the window visibility request, display images with imshow, and run the key event handler.
// return: false if shutdown is requested.
bool DisplayImages()
{
  HandleWindowVisibilityRequest();

  // Show windows
  if(!WindowsHidden)
  {
    for(std::map<std::string, TIMShowStuff>::iterator itr(IMShowStuff.begin()),itr_end(IMShowStuff.end()); itr!=itr_end; ++itr)
    {
      boost::mutex::scoped_lock lock(*itr->second.Mutex);
      if(itr->second.Frame.total()>0)
        cv::imshow(itr->first, itr->second.Frame);
    }
  }

  if(!HandleKeyEvent())
  {
    Shutdown= true;
    return false;
  }
  return true;
}
//-------------------------------------------------------------------------------------------

int main(int argc, char**argv)
{
  ros::init(argc, argv, "fv_core_node");
  ros::NodeHandle node("~");
  ros::Duration(0.1).sleep();
  std::string cam_config("config/cam1.yaml");
  std::string blobtrack_config("config/cam1.yaml");
  std::string objdettrack_config("config/cam1.yaml");
  std::string vout_base("/tmp/vout-");
  bool camera_auto_reopen(true), publish_image(false), initial_obj_detect(true);

  node.param("pkg_dir",PkgDir,PkgDir);
  node.param("cam_config",cam_config,cam_config);
  node.param("blobtrack_config",blobtrack_config,blobtrack_config);
  node.param("objdettrack_config",objdettrack_config,objdettrack_config);
  node.param("config_out",ConfigOut,ConfigOut);
  node.param("blob_calib_prefix",BlobCalibPrefix,BlobCalibPrefix);
  node.param("objdet_model_prefix",ObjDetModelPrefix,ObjDetModelPrefix);
  node.param("vout_base",vout_base,vout_base);
  node.param("frame_skip",FrameSkip,FrameSkip);
  node.param("target_fps",TargetFPS,TargetFPS);
  node.param("capture_fps",CaptureFPS,CaptureFPS);
  node.param("camera_auto_reopen",camera_auto_reopen,camera_auto_reopen);
  node.param("windows_hidden",WindowsHidden,WindowsHidden);
  node.param("publish_image",publish_image,publish_image);
  node.param("initial_obj_detect",initial_obj_detect,initial_obj_detect);
  std::cerr<<"pkg_dir: "<<PkgDir<<std::endl;
  std::cerr<<"cam_config: "<<cam_config<<std::endl;
  std::cerr<<"blobtrack_config: "<<blobtrack_config<<std::endl;
  std::cerr<<"objdettrack_config: "<<objdettrack_config<<std::endl;
  std::cerr<<"config_out: "<<ConfigOut<<std::endl;
  std::cerr<<"blob_calib_prefix: "<<BlobCalibPrefix<<std::endl;
  std::cerr<<"objdet_model_prefix: "<<ObjDetModelPrefix<<std::endl;

  std::vector<TBlobTracker2Params> blobtrack_info;
  std::vector<TObjDetTrackBSPParams> objdettrack_info;
  ReadFromYAML(CamInfo, CheckYAMLExistence(PathJoin(PkgDir,SplitString(cam_config))));
  ReadFromYAML(blobtrack_info, CheckYAMLExistence(PathJoin(PkgDir,SplitString(blobtrack_config))));
  ReadFromYAML(objdettrack_info, CheckYAMLExistence(PathJoin(PkgDir,SplitString(objdettrack_config))));

  std::vector<cv::VideoCapture> cap(CamInfo.size());
  CamRectifier.resize(CamInfo.size());
  Frame.resize(CamInfo.size());
  CapTime.resize(CamInfo.size());
  for(int i_cam(0), i_cam_end(CamInfo.size()); i_cam<i_cam_end; ++i_cam)
  {
    TCameraInfo &info(CamInfo[i_cam]);
    if(!CapOpen(info, cap[i_cam]))  return -1;
    MutCamCapture.push_back(boost::shared_ptr<boost::mutex>(new boost::mutex));
    MutFrameCopy.push_back(boost::shared_ptr<boost::mutex>(new boost::mutex));

    if(info.Rectification)
    {
      // Setup rectification
      cv::Size size_in(info.Width,info.Height), size_out(info.Width,info.Height);
      CamRectifier[i_cam].Setup(info.K, info.D, info.R, size_in, info.Alpha, size_out);
    }
  }
  std::cerr<<"Opened camera(s)"<<std::endl;

  BlobTracker.resize(blobtrack_info.size());
  for(int j(0),j_end(blobtrack_info.size());j<j_end;++j)
  {
    BlobTracker[j].Name= CamInfo[j].Name+"-blob";
    BlobTracker[j].Params()= blobtrack_info[j];
    BlobTracker[j].Init();
    if(FileExists(PathJoin(PkgDir,BlobCalibPrefix+CamInfo[j].Name+".yaml")))
      BlobTracker[j].LoadCalib(PathJoin(PkgDir,BlobCalibPrefix+CamInfo[j].Name+".yaml"));
    MutTracker[BlobTracker[j].Name]= boost::shared_ptr<boost::mutex>(new boost::mutex);
    WindowInfo[BlobTracker[j].Name]= TWindowInfo(j, "BlobTracker", j);
    if(!WindowsHidden)
    {
      cv::namedWindow(BlobTracker[j].Name,1);
      cv::setMouseCallback(BlobTracker[j].Name, OnMouse, &BlobTracker[j].Name);
    }
    IMShowStuff[BlobTracker[j].Name].Mutex= boost::shared_ptr<boost::mutex>(new boost::mutex);
    ShowTrackbars[BlobTracker[j].Name].Kind= "BlobTracker";
  }

  ObjDetTracker.resize(objdettrack_info.size());
  bool objdet_model_loaded(false);
  for(int j(0),j_end(objdettrack_info.size());j<j_end;++j)
  {
    ObjDetTracker[j].Name= CamInfo[j].Name+"-pxv";
    ObjDetTracker[j].Params()= objdettrack_info[j];
    ObjDetTracker[j].Init();
    if(initial_obj_detect)  ObjDetTracker[j].StartDetect();
    else                    ObjDetTracker[j].StopDetect();
    if(FileExists(PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[j].Name+".yaml")))
    {
      ObjDetTracker[j].LoadBGObjModels(PathJoin(PkgDir,ObjDetModelPrefix+CamInfo[j].Name+".yaml"));
      objdet_model_loaded= true;
    }
    MutTracker[ObjDetTracker[j].Name]= boost::shared_ptr<boost::mutex>(new boost::mutex);
    WindowInfo[ObjDetTracker[j].Name]= TWindowInfo(j, "ObjDetTracker", j);
    if(!WindowsHidden)
    {
      cv::namedWindow(ObjDetTracker[j].Name,1);
      cv::setMouseCallback(ObjDetTracker[j].Name, OnMouse, &ObjDetTracker[j].Name);
    }
    IMShowStuff[ObjDetTracker[j].Name].Mutex= boost::shared_ptr<boost::mutex>(new boost::mutex);
    ShowTrackbars[ObjDetTracker[j].Name].Kind= "ObjDetTracker";
  }

  SetVideoPrefix(vout_base);

  BlobPub.resize(BlobTracker.size());
  for(int j(0),j_end(BlobTracker.size());j<j_end;++j)
    BlobPub[j]= node.advertise<fingervision_msgs::BlobMoves>(ros::this_node::getNamespace()+"/"+CamInfo[j].Name+"/blob_moves", 1);

  PXVPub.resize(ObjDetTracker.size());
  PXVObjDetModePub.resize(ObjDetTracker.size());
  for(int j(0),j_end(ObjDetTracker.size());j<j_end;++j)
  {
    PXVPub[j]= node.advertise<fingervision_msgs::ProxVision>(ros::this_node::getNamespace()+"/"+CamInfo[j].Name+"/prox_vision", 1);
    PXVObjDetModePub[j]= node.advertise<std_msgs::Bool>(ros::this_node::getNamespace()+"/"+CamInfo[j].Name+"/pxv_obj_detection", 1);
  }

  FPSBlobPub= node.advertise<std_msgs::Float32>("blob_fps", 1);
  FPSPXVPub= node.advertise<std_msgs::Float32>("pxv_fps", 1);

  image_transport::ImageTransport imgtr(node);
  typedef boost::shared_ptr<camera_info_manager::CameraInfoManager> CamInfoMngrPtr;
  std::vector<CamInfoMngrPtr> info_manager;
  if(publish_image)
  {
    ImgPub.resize(CamInfo.size());
    info_manager.resize(CamInfo.size());
    for(int i_cam(0), i_cam_end(CamInfo.size()); i_cam<i_cam_end; ++i_cam)
    {
      ImgPub[i_cam]= imgtr.advertise(ros::this_node::getNamespace()+"/"+CamInfo[i_cam].Name, 1);
      info_manager[i_cam]= CamInfoMngrPtr(new camera_info_manager::CameraInfoManager(ros::NodeHandle("/"+CamInfo[i_cam].Name), CamInfo[i_cam].Name, /*camera_info_url=*/""));
    }
  }

  ros::ServiceServer srv_pause= node.advertiseService("pause", &Pause);
  ros::ServiceServer srv_resume= node.advertiseService("resume", &Resume);
  ros::ServiceServer srv_show_windows= node.advertiseService("show_windows", &ShowWindows);
  ros::ServiceServer srv_hide_windows= node.advertiseService("hide_windows", &HideWindows);
  ros::ServiceServer srv_start_record= node.advertiseService("start_record", &StartRecord);
  ros::ServiceServer srv_stop_record= node.advertiseService("stop_record", &StopRecord);
  ros::ServiceServer srv_set_video_prefix= node.advertiseService("set_video_prefix", &SetVideoPrefix);
  ros::ServiceServer srv_set_frame_skip= node.advertiseService("set_frame_skip", &SetFrameSkip);
  ros::ServiceServer srv_take_snapshot= node.advertiseService("take_snapshot", &TakeSnapshot);
  ros::ServiceServer srv_stop_detect_obj= node.advertiseService("stop_detect_obj", &StopDetectObj);
  ros::ServiceServer srv_start_detect_obj= node.advertiseService("start_detect_obj", &StartDetectObj);
  ros::ServiceServer srv_clear_obj= node.advertiseService("clear_obj", &ClearObj);
  ros::ServiceServer srv_req_calibrate= node.advertiseService("req_calibrate", &ReqCalibrate);
  ros::ServiceServer srv_req_initialize= node.advertiseService("req_initialize", &ReqInitialize);
  ros::ServiceServer srv_set_dim_level= node.advertiseService("set_dim_level", &SetDimLevel);
  ros::ServiceServer srv_srv_set_trackbar_mode= node.advertiseService("set_trackbar_mode", &SetTrackbarMode);
  ros::ServiceServer srv_save_parameters= node.advertiseService("save_parameters", &SaveParameters);
  ros::ServiceServer srv_load_parameters= node.advertiseService("load_parameters", &LoadParameters);
  ros::ServiceServer srv_save_calibration= node.advertiseService("save_calibration", &SaveCalibration);
  ros::ServiceServer srv_load_calibration= node.advertiseService("load_calibration", &LoadCalibration);

  // Dummy capture.
  for(int i_cam(0), i_cam_end(CamInfo.size()); i_cam<i_cam_end; ++i_cam)
  {
    cap[i_cam] >> Frame[i_cam];
    CapTime[i_cam]= GetCurrentTimeL();
  }

  // Calibrate ObjDetTracker
  if(ObjDetTracker.size()>0 && !objdet_model_loaded)
  {
    std::vector<std::vector<cv::Mat> > frames(ObjDetTracker.size());
    for(int i_cam(0), i_cam_end(ObjDetTracker.size()); i_cam<i_cam_end; ++i_cam)
    {
      frames[i_cam]= CaptureSeq(cap[i_cam], i_cam, ObjDetTracker[i_cam].Params().NCalibBGFrames);
      for(int i_frame(0),i_frame_end(frames[i_cam].size()); i_frame<i_frame_end; ++i_frame)
        Preprocess(frames[i_cam][i_frame], CamInfo[i_cam], &CamRectifier[i_cam]);
    }
    for(int j(0),j_end(ObjDetTracker.size()); j<j_end; ++j)
      ObjDetTracker[j].CalibBG(frames[j]);
  }

  std::vector<boost::shared_ptr<boost::thread> > th_blobtrack;
  for(int j(0),j_end(BlobTracker.size());j<j_end;++j)
    th_blobtrack.push_back(boost::shared_ptr<boost::thread>(new boost::thread(boost::bind(ExecBlobTrack,j))));

  std::vector<boost::shared_ptr<boost::thread> > th_objdettrack;
  for(int j(0),j_end(ObjDetTracker.size());j<j_end;++j)
    th_objdettrack.push_back(boost::shared_ptr<boost::thread>(new boost::thread(boost::bind(ExecObjDetTrack,j))));

  std::vector<boost::shared_ptr<boost::thread> > th_imgpub;
  if(publish_image)
    for(int j(0),j_end(CamInfo.size());j<j_end;++j)
      th_imgpub.push_back(boost::shared_ptr<boost::thread>(new boost::thread(boost::bind(ExecImgPublisher,j))));

  ExecImgCapture(cap, camera_auto_reopen, /*disp_images=*/true, /*handle_key_event=*/true);

  Shutdown= true;
  for(int j(0),j_end(th_blobtrack.size());j<j_end;++j)
    th_blobtrack[j]->join();
  for(int j(0),j_end(th_objdettrack.size());j<j_end;++j)
    th_objdettrack[j]->join();
  if(publish_image)
    for(int j(0),j_end(th_imgpub.size());j<j_end;++j)
      th_imgpub[j]->join();

  usleep(500*1000);

  return 0;
}
//-------------------------------------------------------------------------------------------
↑

Implementation Overview †

Features:

Discussion
There are two ways to handle multiple cameras: one is using a single fv_core_node node to handle all cameras, and the other is using multiple fv_core_node nodes (fv_core_node per camera). Based on our experience, the fv_core_node-per-camera strategy seems to be more efficient.

Threading: There are 1+2N threads where N is the number of cameras.

↑

Parameters †

Following ROS parameters are defined:

More details are as follows.

↑

Path Definitions †

CameraName[i] denotes the Name parameter of the i-th camera configuration.

Video recording:

↑

FPS Control †

Both frame_skip and target_fps are used for controlling (decreasing) FPS. Do not set both parameters simultaneously. Note that there is no way to increase the FPS with the ROS node.

The pseudo codes of the behaviors are as follows:

frame_skip:

 for each frame index f:
   Capture frame;
   if(frame_skip<=0 || f%(frame_skip+1)==0)
     Set frame as an input image to be processed;
   else
     Throw away frame;

target_fps:

 In thread of each process:
   ros::Rate rate(TargetFPS)
   for each input frame:
     Do the process;
     rate.sleep()
↑

Topics †

There are 2N topics where N is the number of cameras.

CameraName[i] denotes the Name parameter of the i-th camera configuration.

↑

blob_moves †

Message type: fingervision_msgs/BlobMoves

 std_msgs/Header header
   uint32 seq
   time stamp
   string frame_id
 int32 camera_index
 string camera_name
 int32 width
 int32 height
 fingervision_msgs/BlobMove[] data
   float32 Pox
   float32 Poy
   float32 So
   float32 DPx
   float32 DPy
   float32 DS
↑

prox_vision †

Message type: fingervision_msgs/ProxVision

 std_msgs/Header header
   uint32 seq
   time stamp
   string frame_id
 int32 camera_index
 string camera_name
 int32 width
 int32 height
 float32[] ObjM_m
 float32[] ObjM_mu
 float32[] ObjM_nu
 float32[] ObjS
 float32[] MvS

For the result of proximity vision, refer to Access to the Result of TObjDetTrackBSP.

The serialization of OpenCV matrices ObjS and MvS is done as follows:

for(int r(0),rend(m.rows),i(0);r<rend;++r) 
  for(int c(0),cend(m.cols);c<cend;++c,++i)
    array[i]= m.at<float>(r,c);
↑

Services †

fingervision_msgs/SetInt32:

int32 data
---
bool result
↑

User Interface †

There are 2N windows where N is the number of cameras. For each camera (or video stream or video file), two windows are created:

They have common and window-specific mouse and key command. To use a window-specific key command, click the window and press the key.

Common mouse and key command:

Marker tracking window:

Proximity vision window:

↑

Config and Launch Files †

Although the fv_core_node can be executed directly, it is recommended to use configuration and launch files.

The fingervision package provides some representative examples of configuration and launch files. Let's see them as the case study.

↑

Single FingerVision, Direct USB Connection †

The setup is as follows:

The configuration file is: fingervision/config/fv_1.yaml

%YAML:1.0
#For single FingerVision demo

CameraInfo:
  -
    Name: fv_1
    DevID: "1"
    Width: 320
    Height: 240
    PixelFormat: MJPG
    NRotate90: 0
    Rectification: 1
    Alpha: 0.8
    K: !!opencv-matrix
      rows: 3
      cols: 3
      dt: d
      data: [ 2.5e+02, 0., 1.6184603192794432e+02, 0.,
          2.5e+02, 1.2062472517136455e+02, 0., 0., 1. ]
    D: !!opencv-matrix
      rows: 1
      cols: 5
      dt: d
      data: [ -9.7e-01, 8.5e-01, 0., 0., 0. ]
    R: !!opencv-matrix
      rows: 3
      cols: 3
      dt: d
      data: [ 1.0, 0.0, 0.0,  0.0, 1.0, 0.0,  0.0, 0.0, 1.0 ]

BlobTracker2:
  -
    # SBDParams_filterByColor: 0
    # SBDParams_blobColor: 0
    # SBDParams_minThreshold : 30
    # SBDParams_maxThreshold : 200
    # SBDParams_filterByArea : true
    # SBDParams_minArea : 40
    # SBDParams_filterByCircularity : true
    # SBDParams_minCircularity : 0.10
    # SBDParams_filterByConvexity : true
    # SBDParams_minConvexity : 0.87
    # SBDParams_filterByInertia : true
    # SBDParams_minInertiaRatio : 0.01
    ThreshH: 180
    ThreshS: 255
    ThreshV: 42
    NDilate1: 0  #2
    NErode1: 0  #2
    SWidth: 30
    NonZeroMin: 0.3  #0.5
    NonZeroMax: 3.0  #1.5
    VPMax: 5.0
    VSMax: 1.0
    NReset: 3
    DistMaxCalib: 0.8
    DSMaxCalib: 0.5
    DSEmp: 4.0
    DPEmp: 10.0
    NCalibPoints: 10

ObjDetTrack:
  -
    Width: 320
    Height: 240
    ThreshBlkH: 180
    ThreshBlkS: 255
    ThreshBlkV: 1
    BS_History: 30.0
    BS_VarThreshold: 10.0
    BS_DetectShadows: true
    NErode1: 0
    BinsH: 50
    BinsS: 10
    BinsV: 10
    Fbg: 1.0
    Fgain: 2.5
    NumModel: 5
    NumFramesInHist: 200
    BackProjScale: 5.0
    NThreshold2: 150
    NErode2: 2
    NDilate2: 7
    NCalibBGFrames: 3
    ObjSW: 3
    ObjSH: 3
    MvSW: 3
    MvSH: 3

The launch file (without FV-Filter) is: fingervision/launch/fv_1.launch

<!-- For a single FingerVision demo (USB connection) -->
<launch>
  <node type="fv_core_node" pkg="fingervision" name="fv_1" ns="fingervision" output="screen">
    <param name="pkg_dir" value="$(find fingervision)/" />
    <param name="cam_config" value="config/fv_1.yaml" />
    <param name="stereo_config" value="config/fv_1.yaml" />
    <param name="blobtrack_config" value="config/fv_1.yaml" />
    <param name="objdettrack_config" value="config/fv_1.yaml" />
    <param name="blob_calib_prefix" value="data_gen/blob_" />
    <param name="frame_skip" value="0" />
    <!--<param name="target_fps" value="30" />-->
  </node>
</launch>

The launch file (with FV-Filter) is: fingervision/launch/fv_1_filtered.launch

<!-- For a single FingerVision demo (USB connection) with filter -->
<launch>
  <include file="$(find fingervision)/launch/fv_1.launch"/>

  <node type="fv_filter1.py" pkg="fingervision" name="fv_filter1" ns="fingervision" output="screen">
    <param name="fv" value="fv_1" />
    <param name="side" value="r" />
  </node>
</launch>

Usage: Run one of followings:

$ roslaunch fingervision fv_1.launch
$ roslaunch fingervision fv_1_filtered.launch
↑

Two FingerVision, Video Streaming with Raspberry Pi †

The setup is as follows:

Tips
If the IP address of your Raspberry Pi is 192.168.1.100, you can give an alias pi1 by editing /etc/hosts. Just add the following line: 
192.168.1.100    pi1

There are two configuration files.

The launch file (without FV-Filter) is: fingervision/launch/fv_2.launch

<!-- FingerVision demo of two sensors streamed over Ethernet network -->
<launch>
  <node type="fv_core_node" pkg="fingervision" name="fv_2_l" ns="fingervision" output="screen">
    <param name="pkg_dir" value="$(find fingervision)/" />
    <param name="cam_config" value="config/fv_2_l.yaml" />
    <param name="stereo_config" value="config/fv_2_l.yaml" />
    <param name="blobtrack_config" value="config/fv_2_l.yaml" />
    <param name="objdettrack_config" value="config/fv_2_l.yaml" />
    <param name="blob_calib_prefix" value="data_gen/blob_" />
    <param name="frame_skip" value="0" />
    <param name="target_fps" value="30" />
  </node>
  <node type="fv_core_node" pkg="fingervision" name="fv_2_r" ns="fingervision" output="screen">
    <param name="pkg_dir" value="$(find fingervision)/" />
    <param name="cam_config" value="config/fv_2_r.yaml" />
    <param name="stereo_config" value="config/fv_2_r.yaml" />
    <param name="blobtrack_config" value="config/fv_2_r.yaml" />
    <param name="objdettrack_config" value="config/fv_2_r.yaml" />
    <param name="blob_calib_prefix" value="data_gen/blob_" />
    <param name="frame_skip" value="0" />
    <param name="target_fps" value="30" />
  </node>
</launch>

Note that two fv_core_node instances are created in this launch file.

The launch file (with FV-Filter) is: fingervision/launch/fv_2_filtered.launch

Usage: Run one of followings:

$ roslaunch fingervision fv_2.launch
$ roslaunch fingervision fv_2_filtered.launch
↑

Dummy Videos of Two FingerVision †

The setup is as follows:

There are two configuration files.

The launch file (without FV-Filter) is: fingervision/launch/fv_3.launch
Note that two fv_core_node instances are created in this launch file.

The launch file (with FV-Filter) is: fingervision/launch/fv_3_filtered.launch

Usage:

First, we launch MJPG-Streamer to stream the videos. Run one of followings:

$ rosrun fingervision stream_file1.sh
$ rosrun fingervision stream_file2.sh
$ rosrun fingervision stream_file3.sh

Then we launch fv_core_node. Run one of followings:

$ roslaunch fingervision fv_3.launch
$ roslaunch fingervision fv_3_filtered.launch
↑

Calibration Results †

The calibration results of the marker tracking are stored in the fingervision/data_gen/ directory (this can be changed by setting the blob_calib_prefix parameters). Press 's' on the marker tracking window to save the calibration result. For the dummy data, the calibration results of the FingerVision sensors used to recording the dummy videos are provided: data_gen/blob_fv_3_l.yaml, data_gen/blob_fv_3_r.yaml.



Last-modified:2018-08-19 (Sun) 10:29:59 (1931d)
Site admin: Akihiko Yamaguchi.
Written by: Akihiko Yamaguchi.
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