Visual Servoing Platform  version 3.6.1 under development (2024-05-26)
servoPtu46Point2DArtVelocity.cpp

Example of eye-in-hand control law. We control here a real robot, the ptu-46 robot (pan-tilt head provided by Directed Perception). The velocity is computed in articular. The visual feature is the center of gravity of a point.

/*
* ViSP, open source Visual Servoing Platform software.
* Copyright (C) 2005 - 2023 by Inria. All rights reserved.
*
* This software is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* See the file LICENSE.txt at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using ViSP with software that can not be combined with the GNU
* GPL, please contact Inria about acquiring a ViSP Professional
* Edition License.
*
* See https://visp.inria.fr for more information.
*
* This software was developed at:
* Inria Rennes - Bretagne Atlantique
* Campus Universitaire de Beaulieu
* 35042 Rennes Cedex
* France
*
* If you have questions regarding the use of this file, please contact
* Inria at visp@inria.fr
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Description:
* tests the control law
* eye-in-hand control
* velocity computed in articular
*/
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpDebug.h> // Debug trace
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
#include <unistd.h>
#endif
#include <signal.h>
#if defined(VISP_HAVE_PTU46) && defined(VISP_HAVE_DC1394) && defined(VISP_HAVE_THREADS)
#include <mutex>
#include <visp3/core/vpDisplay.h>
#include <visp3/core/vpImage.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/sensor/vp1394TwoGrabber.h>
#include <visp3/core/vpHomogeneousMatrix.h>
#include <visp3/core/vpMath.h>
#include <visp3/core/vpPoint.h>
#include <visp3/visual_features/vpFeatureBuilder.h>
#include <visp3/visual_features/vpFeaturePoint.h>
#include <visp3/vs/vpServo.h>
#include <visp3/robot/vpRobotPtu46.h>
// Exception
#include <visp3/core/vpException.h>
#include <visp3/vs/vpServoDisplay.h>
#include <visp3/blob/vpDot2.h>
std::mutex mutexEndLoop;
void signalCtrC(int signumber)
{
(void)(signumber);
mutexEndLoop.unlock();
usleep(1000 * 10);
vpTRACE("Ctrl-C pressed...");
}
int main()
{
std::cout << std::endl;
std::cout << "-------------------------------------------------------" << std::endl;
std::cout << " Test program for vpServo " << std::endl;
std::cout << " Eye-in-hand task control, velocity computed in the camera frame" << std::endl;
std::cout << " Simulation " << std::endl;
std::cout << " task : servo a point " << std::endl;
std::cout << "-------------------------------------------------------" << std::endl;
std::cout << std::endl;
try {
mutexEndLoop.lock();
signal(SIGINT, &signalCtrC);
vpRobotPtu46 robot;
{
q = 0;
robot.setPosition(vpRobot::ARTICULAR_FRAME, q);
}
g.open(I);
try {
g.acquire(I);
}
catch (...) {
vpERROR_TRACE(" Error caught");
return EXIT_FAILURE;
}
vpDisplayX display(I, 100, 100, "testDisplayX.cpp ");
vpTRACE(" ");
try {
}
catch (...) {
vpERROR_TRACE(" Error caught");
return EXIT_FAILURE;
}
vpServo task;
vpDot2 dot;
try {
vpERROR_TRACE("start dot.initTracking(I) ");
dot.setCog(germ);
vpDEBUG_TRACE(25, "Click!");
// dot.initTracking(I) ;
dot.track(I);
vpERROR_TRACE("after dot.initTracking(I) ");
}
catch (...) {
vpERROR_TRACE(" Error caught ");
return EXIT_FAILURE;
}
vpTRACE("sets the current position of the visual feature ");
vpFeatureBuilder::create(p, cam, dot); // retrieve x,y and Z of the vpPoint structure
p.set_Z(1);
vpTRACE("sets the desired position of the visual feature ");
pd.build(0, 0, 1);
vpTRACE("define the task");
vpTRACE("\t we want an eye-in-hand control law");
vpTRACE("\t articular velocity are computed");
vpTRACE("Set the position of the end-effector frame in the camera frame");
// robot.get_cMe(cMe) ;
robot.get_cVe(cVe);
std::cout << cVe << std::endl;
task.set_cVe(cVe);
vpTRACE("Set the Jacobian (expressed in the end-effector frame)");
vpMatrix eJe;
robot.get_eJe(eJe);
task.set_eJe(eJe);
vpTRACE("\t we want to see a point on a point..");
std::cout << std::endl;
task.addFeature(p, pd);
vpTRACE("\t set the gain");
task.setLambda(0.1);
vpTRACE("Display task information ");
task.print();
unsigned int iter = 0;
vpTRACE("\t loop");
while (0 != mutexEndLoop.trylock()) {
std::cout << "---------------------------------------------" << iter << std::endl;
g.acquire(I);
dot.track(I);
// get the jacobian
robot.get_eJe(eJe);
task.set_eJe(eJe);
// std::cout << (vpMatrix)cVe*eJe << std::endl ;
v = task.computeControlLaw();
vpServoDisplay::display(task, cam, I);
std::cout << v.t();
vpTRACE("\t\t || s - s* || = %f ", (task.getError()).sumSquare());
}
vpTRACE("Display task information ");
task.print();
}
catch (const vpException &e) {
std::cout << "Sorry PtU46 not available. Got exception: " << e << std::endl;
return EXIT_FAILURE
}
return EXIT_SUCCESS;
}
#else
int main() { std::cout << "You do not have an PTU46 PT robot connected to your computer..." << std::endl; }
#endif
Class for firewire ieee1394 video devices using libdc1394-2.x api.
void acquire(vpImage< unsigned char > &I)
void open(vpImage< unsigned char > &I)
Generic class defining intrinsic camera parameters.
Implementation of column vector and the associated operations.
Definition: vpColVector.h:163
vpRowVector t() const
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:128
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)
This tracker is meant to track a blob (connex pixels with same gray level) on a vpImage.
Definition: vpDot2.h:124
void track(const vpImage< unsigned char > &I, bool canMakeTheWindowGrow=true)
Definition: vpDot2.cpp:435
void setCog(const vpImagePoint &ip)
Definition: vpDot2.h:256
error that can be emitted by ViSP classes.
Definition: vpException.h:59
static void create(vpFeaturePoint &s, const vpCameraParameters &cam, const vpDot &d)
Class that defines a 2D point visual feature which is composed by two parameters that are the cartes...
vpFeaturePoint & build(const double &x, const double &y, const double &Z)
void set_Z(double Z)
Implementation of an homogeneous matrix and operations on such kind of matrices.
Class that defines a 2D point in an image. This class is useful for image processing and stores only ...
Definition: vpImagePoint.h:82
Implementation of a matrix and operations on matrices.
Definition: vpMatrix.h:146
void get_eJe(vpMatrix &eJe) vp_override
void setVelocity(const vpRobot::vpControlFrameType frame, const vpColVector &vel) vp_override
Interface for the Directed Perception ptu-46 pan, tilt head .
Definition: vpRobotPtu46.h:78
@ ARTICULAR_FRAME
Definition: vpRobot.h:78
@ STATE_POSITION_CONTROL
Initialize the position controller.
Definition: vpRobot.h:66
@ STATE_VELOCITY_CONTROL
Initialize the velocity controller.
Definition: vpRobot.h:65
virtual vpRobotStateType setRobotState(const vpRobot::vpRobotStateType newState)
Definition: vpRobot.cpp:198
static void display(const vpServo &s, const vpCameraParameters &cam, const vpImage< unsigned char > &I, vpColor currentColor=vpColor::green, vpColor desiredColor=vpColor::red, unsigned int thickness=1)
void setInteractionMatrixType(const vpServoIteractionMatrixType &interactionMatrixType, const vpServoInversionType &interactionMatrixInversion=PSEUDO_INVERSE)
Definition: vpServo.cpp:378
@ EYEINHAND_L_cVe_eJe
Definition: vpServo.h:162
void addFeature(vpBasicFeature &s_cur, vpBasicFeature &s_star, unsigned int select=vpBasicFeature::FEATURE_ALL)
Definition: vpServo.cpp:329
void set_cVe(const vpVelocityTwistMatrix &cVe_)
Definition: vpServo.h:1028
void print(const vpServo::vpServoPrintType display_level=ALL, std::ostream &os=std::cout)
Definition: vpServo.cpp:169
void setLambda(double c)
Definition: vpServo.h:976
void set_eJe(const vpMatrix &eJe_)
Definition: vpServo.h:1091
void setServo(const vpServoType &servo_type)
Definition: vpServo.cpp:132
vpColVector getError() const
Definition: vpServo.h:504
@ PSEUDO_INVERSE
Definition: vpServo.h:229
vpColVector computeControlLaw()
Definition: vpServo.cpp:703
@ DESIRED
Definition: vpServo.h:202
vpVelocityTwistMatrix get_cVe() const
Definition: vpUnicycle.h:70
#define vpTRACE
Definition: vpDebug.h:407
#define vpDEBUG_TRACE
Definition: vpDebug.h:475
#define vpERROR_TRACE
Definition: vpDebug.h:384
void display(vpImage< unsigned char > &I, const std::string &title)
Display a gray-scale image.