Visual Servoing Platform  version 3.5.1 under development (2022-07-07)
#include <visp3/core/vpIoTools.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/io/vpImageIo.h>
#include <visp3/io/vpVideoReader.h>
#include <visp3/mbt/vpMbKltTracker.h>
int main(int argc, char **argv)
#if defined(VISP_HAVE_OPENCV) && (VISP_HAVE_OPENCV_VERSION >= 0x020100)
try {
std::string videoname = "teabox.mp4";
for (int i = 0; i < argc; i++) {
if (std::string(argv[i]) == "--name")
videoname = std::string(argv[i + 1]);
else if (std::string(argv[i]) == "--help") {
std::cout << "\nUsage: " << argv[0] << " [--name <video name>] [--help]\n" << std::endl;
return 0;
std::string parentname = vpIoTools::getParent(videoname);
std::string objectname = vpIoTools::getNameWE(videoname);
if (!parentname.empty())
objectname = parentname + "/" + objectname;
std::cout << "Video name: " << videoname << std::endl;
std::cout << "Tracker requested config files: " << objectname << ".[init,"
<< "xml,"
<< "cao or wrl]" << std::endl;
std::cout << "Tracker optional config files: " << objectname << ".[ppm]" << std::endl;
#if defined(VISP_HAVE_X11)
vpDisplayX display;
#elif defined(VISP_HAVE_GDI)
vpDisplayGDI display;
#elif defined(VISP_HAVE_OPENCV)
vpDisplayOpenCV display;
std::cout << "No image viewer is available..." << std::endl;
return 0;
display.init(I, 100, 100, "Model-based keypoint tracker");
vpMbKltTracker tracker;
bool usexml = false;
if (vpIoTools::checkFilename(objectname + ".xml")) {
tracker.loadConfigFile(objectname + ".xml");
usexml = true;
if (!usexml) {
vpKltOpencv klt_settings;
cam.initPersProjWithoutDistortion(839, 839, 325, 243);
tracker.loadModel(objectname + "-triangle.cao");
tracker.initClick(I, objectname + ".init", true);
while (!g.end()) {
tracker.display(I, cMo, cam, vpColor::red, 2);
vpDisplay::displayFrame(I, cMo, cam, 0.025, vpColor::none, 3);
vpDisplay::displayText(I, 10, 10, "A click to exit...", vpColor::red);
if (vpDisplay::getClick(I, false))
} catch (const vpException &e) {
std::cout << "Catch a ViSP exception: " << e << std::endl;
catch (Ogre::Exception &e) {
std::cout << "Catch an Ogre exception: " << e.getDescription() << std::endl;
std::cout << "Install OpenCV and rebuild ViSP to use this example." << std::endl;
Generic class defining intrinsic camera parameters.
void initPersProjWithoutDistortion(double px, double py, double u0, double v0)
static const vpColor red
Definition: vpColor.h:217
static const vpColor none
Definition: vpColor.h:229
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:129
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:135
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
static void display(const vpImage< unsigned char > &I)
static void flush(const vpImage< unsigned char > &I)
static void displayFrame(const vpImage< unsigned char > &I, const vpHomogeneousMatrix &cMo, const vpCameraParameters &cam, double size, const vpColor &color=vpColor::none, unsigned int thickness=1, const vpImagePoint &offset=vpImagePoint(0, 0))
static void displayText(const vpImage< unsigned char > &I, const vpImagePoint &ip, const std::string &s, const vpColor &color)
error that can be emited by ViSP classes.
Definition: vpException.h:72
Implementation of an homogeneous matrix and operations on such kind of matrices.
static bool checkFilename(const std::string &filename)
Definition: vpIoTools.cpp:800
static std::string getNameWE(const std::string &pathname)
Definition: vpIoTools.cpp:1536
static std::string getParent(const std::string &pathname)
Definition: vpIoTools.cpp:1620
Wrapper for the KLT (Kanade-Lucas-Tomasi) feature tracker implemented in OpenCV. Thus to enable this ...
Definition: vpKltOpencv.h:79
void setBlockSize(int blockSize)
void setQuality(double qualityLevel)
void setHarrisFreeParameter(double harris_k)
void setMaxFeatures(int maxCount)
void setMinDistance(double minDistance)
void setWindowSize(int winSize)
void setPyramidLevels(int pyrMaxLevel)
static double rad(double deg)
Definition: vpMath.h:117
Model based tracker using only KLT.
virtual void track(const vpImage< unsigned char > &I)
virtual void setKltOpencv(const vpKltOpencv &t)
virtual void loadConfigFile(const std::string &configFile, bool verbose=true)
virtual void display(const vpImage< unsigned char > &I, const vpHomogeneousMatrix &cMo, const vpCameraParameters &cam, const vpColor &col, unsigned int thickness=1, bool displayFullModel=false)
virtual void setOgreVisibilityTest(const bool &v)
void setCameraParameters(const vpCameraParameters &cam)
void setKltMaskBorder(const unsigned int &e)
virtual void setOgreShowConfigDialog(bool showConfigDialog)
Definition: vpMbTracker.h:647
virtual void getCameraParameters(vpCameraParameters &cam) const
Definition: vpMbTracker.h:248
virtual void setDisplayFeatures(bool displayF)
Definition: vpMbTracker.h:518
virtual void getPose(vpHomogeneousMatrix &cMo) const
Definition: vpMbTracker.h:414
virtual void setAngleDisappear(const double &a)
Definition: vpMbTracker.h:481
virtual void initClick(const vpImage< unsigned char > &I, const std::string &initFile, bool displayHelp=false, const vpHomogeneousMatrix &T=vpHomogeneousMatrix())
virtual void setNearClippingDistance(const double &dist)
virtual void setFarClippingDistance(const double &dist)
virtual void setClipping(const unsigned int &flags)
virtual void loadModel(const std::string &modelFile, bool verbose=false, const vpHomogeneousMatrix &T=vpHomogeneousMatrix())
virtual void setAngleAppear(const double &a)
Definition: vpMbTracker.h:470
virtual unsigned int getClipping() const
Definition: vpMbTracker.h:256
Class that enables to manipulate easily a video file or a sequence of images. As it inherits from the...
void acquire(vpImage< vpRGBa > &I)
void open(vpImage< vpRGBa > &I)
void setFileName(const std::string &filename)