Visual Servoing Platform  version 3.6.1 under development (2024-12-07)
tutorial-apriltag-detector-live.cpp
#include <visp3/core/vpConfig.h>
#ifdef VISP_HAVE_MODULE_SENSOR
#include <visp3/sensor/vp1394CMUGrabber.h>
#include <visp3/sensor/vp1394TwoGrabber.h>
#include <visp3/sensor/vpFlyCaptureGrabber.h>
#include <visp3/sensor/vpRealSense2.h>
#include <visp3/sensor/vpV4l2Grabber.h>
#endif
#include <visp3/detection/vpDetectorAprilTag.h>
#include <visp3/core/vpXmlParserCamera.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
#if defined(HAVE_OPENCV_VIDEOIO)
#include <opencv2/videoio.hpp>
#endif
// #undef VISP_HAVE_V4L2
// #undef VISP_HAVE_DC1394
// #undef VISP_HAVE_CMU1394
// #undef VISP_HAVE_FLYCAPTURE
// #undef VISP_HAVE_REALSENSE2
// #undef VISP_HAVE_OPENCV
int main(int argc, const char **argv)
{
#if defined(VISP_HAVE_APRILTAG) && \
(defined(VISP_HAVE_V4L2) || defined(VISP_HAVE_DC1394) || defined(VISP_HAVE_CMU1394) || \
defined(HAVE_OPENCV_VIDEOIO) || defined(VISP_HAVE_FLYCAPTURE) || defined(VISP_HAVE_REALSENSE2))
#ifdef ENABLE_VISP_NAMESPACE
using namespace VISP_NAMESPACE_NAME;
#endif
int opt_device = 0; // For OpenCV and V4l2 grabber to set the camera device
double tagSize = 0.053;
float quad_decimate = 1.0;
int nThreads = 1;
std::string intrinsic_file = "";
std::string camera_name = "";
bool display_tag = false;
int color_id = -1;
unsigned int thickness = 2;
bool align_frame = false;
#if !(defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(HAVE_OPENCV_HIGHGUI))
bool display_off = true;
std::cout << "Warning: There is no 3rd party (X11, GDI or openCV) to dislay images..." << std::endl;
#else
bool display_off = false;
#endif
for (int i = 1; i < argc; i++) {
if (std::string(argv[i]) == "--pose_method" && i + 1 < argc) {
poseEstimationMethod = (vpDetectorAprilTag::vpPoseEstimationMethod)atoi(argv[i + 1]);
}
else if (std::string(argv[i]) == "--tag_size" && i + 1 < argc) {
tagSize = atof(argv[i + 1]);
}
else if (std::string(argv[i]) == "--camera_device" && i + 1 < argc) {
opt_device = atoi(argv[i + 1]);
}
else if (std::string(argv[i]) == "--quad_decimate" && i + 1 < argc) {
quad_decimate = (float)atof(argv[i + 1]);
}
else if (std::string(argv[i]) == "--nthreads" && i + 1 < argc) {
nThreads = atoi(argv[i + 1]);
}
else if (std::string(argv[i]) == "--intrinsic" && i + 1 < argc) {
intrinsic_file = std::string(argv[i + 1]);
}
else if (std::string(argv[i]) == "--camera_name" && i + 1 < argc) {
camera_name = std::string(argv[i + 1]);
}
else if (std::string(argv[i]) == "--display_tag") {
display_tag = true;
}
else if (std::string(argv[i]) == "--display_off") {
display_off = true;
}
else if (std::string(argv[i]) == "--color" && i + 1 < argc) {
color_id = atoi(argv[i + 1]);
}
else if (std::string(argv[i]) == "--thickness" && i + 1 < argc) {
thickness = (unsigned int)atoi(argv[i + 1]);
}
else if (std::string(argv[i]) == "--tag_family" && i + 1 < argc) {
tagFamily = (vpDetectorAprilTag::vpAprilTagFamily)atoi(argv[i + 1]);
}
else if (std::string(argv[i]) == "--z_aligned") {
align_frame = true;
}
else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
std::cout << "Usage: " << argv[0] << " [--camera_device <camera device> (default: 0)]"
<< " [--tag_size <tag_size in m> (default: 0.053)]"
" [--quad_decimate <quad_decimate> (default: 1)]"
" [--nthreads <nb> (default: 1)]"
" [--intrinsic <intrinsic file> (default: empty)]"
" [--camera_name <camera name> (default: empty)]"
" [--pose_method <method> (0: HOMOGRAPHY, 1: HOMOGRAPHY_VIRTUAL_VS, "
" 2: DEMENTHON_VIRTUAL_VS, 3: LAGRANGE_VIRTUAL_VS, "
" 4: BEST_RESIDUAL_VIRTUAL_VS, 5: HOMOGRAPHY_ORTHOGONAL_ITERATION) (default: 0)]"
" [--tag_family <family> (0: TAG_36h11, 1: TAG_36h10 (DEPRECATED), 2: TAG_36ARTOOLKIT (DEPRECATED),"
" 3: TAG_25h9, 4: TAG_25h7 (DEPRECATED), 5: TAG_16h5, 6: TAG_CIRCLE21h7, 7: TAG_CIRCLE49h12,"
" 8: TAG_CUSTOM48h12, 9: TAG_STANDARD41h12, 10: TAG_STANDARD52h13) (default: 0)]"
" [--display_tag] [--z_aligned]";
#if (defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV))
std::cout << " [--display_off] [--color <color id>] [--thickness <line thickness>]";
#endif
std::cout << " [--help]" << std::endl;
return EXIT_SUCCESS;
}
}
try {
cam.initPersProjWithoutDistortion(615.1674805, 615.1675415, 312.1889954, 243.4373779);
#if defined(VISP_HAVE_PUGIXML)
if (!intrinsic_file.empty() && !camera_name.empty())
parser.parse(cam, intrinsic_file, camera_name, vpCameraParameters::perspectiveProjWithoutDistortion);
#endif
#if defined(VISP_HAVE_V4L2)
std::ostringstream device;
device << "/dev/video" << opt_device;
std::cout << "Use Video 4 Linux grabber on device " << device.str() << std::endl;
g.setDevice(device.str());
g.setScale(1);
g.open(I);
#elif defined(VISP_HAVE_DC1394)
(void)opt_device; // To avoid non used warning
std::cout << "Use DC1394 grabber" << std::endl;
g.open(I);
#elif defined(VISP_HAVE_CMU1394)
(void)opt_device; // To avoid non used warning
std::cout << "Use CMU1394 grabber" << std::endl;
g.open(I);
#elif defined(VISP_HAVE_FLYCAPTURE)
(void)opt_device; // To avoid non used warning
std::cout << "Use FlyCapture grabber" << std::endl;
g.open(I);
#elif defined(VISP_HAVE_REALSENSE2)
(void)opt_device; // To avoid non used warning
std::cout << "Use Realsense 2 grabber" << std::endl;
rs2::config config;
config.disable_stream(RS2_STREAM_DEPTH);
config.disable_stream(RS2_STREAM_INFRARED);
config.enable_stream(RS2_STREAM_COLOR, 640, 480, RS2_FORMAT_RGBA8, 30);
g.open(config);
g.acquire(I);
std::cout << "Read camera parameters from Realsense device" << std::endl;
cam = g.getCameraParameters(RS2_STREAM_COLOR, vpCameraParameters::perspectiveProjWithoutDistortion);
#elif defined(HAVE_OPENCV_VIDEOIO)
std::cout << "Use OpenCV grabber on device " << opt_device << std::endl;
cv::VideoCapture g(opt_device); // Open the default camera
if (!g.isOpened()) { // Check if we succeeded
std::cout << "Failed to open the camera" << std::endl;
return EXIT_FAILURE;
}
cv::Mat frame;
g >> frame; // get a new frame from camera
#endif
std::cout << cam << std::endl;
std::cout << "poseEstimationMethod: " << poseEstimationMethod << std::endl;
std::cout << "tagFamily: " << tagFamily << std::endl;
std::cout << "nThreads : " << nThreads << std::endl;
std::cout << "Z aligned: " << align_frame << std::endl;
vpDisplay *d = nullptr;
if (!display_off) {
#ifdef VISP_HAVE_X11
d = new vpDisplayX(I);
#elif defined(VISP_HAVE_GDI)
d = new vpDisplayGDI(I);
#elif defined(HAVE_OPENCV_HIGHGUI)
d = new vpDisplayOpenCV(I);
#endif
}
vpDetectorAprilTag detector(tagFamily);
detector.setAprilTagQuadDecimate(quad_decimate);
detector.setAprilTagPoseEstimationMethod(poseEstimationMethod);
detector.setAprilTagNbThreads(nThreads);
detector.setDisplayTag(display_tag, color_id < 0 ? vpColor::none : vpColor::getColor(color_id), thickness);
detector.setZAlignedWithCameraAxis(align_frame);
std::vector<double> time_vec;
for (;;) {
#if defined(VISP_HAVE_V4L2) || defined(VISP_HAVE_DC1394) || defined(VISP_HAVE_CMU1394) || \
defined(VISP_HAVE_FLYCAPTURE) || defined(VISP_HAVE_REALSENSE2)
g.acquire(I);
#elif defined(HAVE_OPENCV_VIDEOIO)
g >> frame;
#endif
double t = vpTime::measureTimeMs();
std::vector<vpHomogeneousMatrix> cMo_vec;
detector.detect(I, tagSize, cam, cMo_vec);
time_vec.push_back(t);
std::stringstream ss;
ss << "Detection time: " << t << " ms for " << detector.getNbObjects() << " tags";
vpDisplay::displayText(I, 40, 20, ss.str(), vpColor::red);
for (size_t i = 0; i < cMo_vec.size(); i++) {
vpDisplay::displayFrame(I, cMo_vec[i], cam, tagSize / 2, vpColor::none, 3);
}
vpDisplay::displayText(I, 20, 20, "Click to quit.", vpColor::red);
if (vpDisplay::getClick(I, false))
break;
}
std::cout << "Benchmark computation time" << std::endl;
std::cout << "Mean / Median / Std: " << vpMath::getMean(time_vec) << " ms"
<< " ; " << vpMath::getMedian(time_vec) << " ms"
<< " ; " << vpMath::getStdev(time_vec) << " ms" << std::endl;
if (!display_off)
delete d;
}
catch (const vpException &e) {
std::cerr << "Catch an exception: " << e.getMessage() << std::endl;
}
return EXIT_SUCCESS;
#else
(void)argc;
(void)argv;
#ifndef VISP_HAVE_APRILTAG
std::cout << "Enable Apriltag support, configure and build ViSP to run this tutorial" << std::endl;
#else
std::cout << "Install a 3rd party dedicated to frame grabbing (dc1394, cmu1394, v4l2, OpenCV, FlyCapture, "
"Realsense2), configure and build ViSP again to use this example"
<< std::endl;
#endif
#endif
return EXIT_SUCCESS;
}
Firewire cameras video capture based on CMU 1394 Digital Camera SDK.
Class for firewire ieee1394 video devices using libdc1394-2.x api.
Generic class defining intrinsic camera parameters.
void initPersProjWithoutDistortion(double px, double py, double u0, double v0)
@ perspectiveProjWithoutDistortion
Perspective projection without distortion model.
static vpColor getColor(const unsigned int &i)
Definition: vpColor.h:311
static const vpColor red
Definition: vpColor.h:217
static const vpColor none
Definition: vpColor.h:229
void setZAlignedWithCameraAxis(bool zAlignedWithCameraFrame)
void setDisplayTag(bool display, const vpColor &color=vpColor::none, unsigned int thickness=2)
void setAprilTagQuadDecimate(float quadDecimate)
bool detect(const vpImage< unsigned char > &I) VP_OVERRIDE
@ TAG_36h11
AprilTag 36h11 pattern (recommended)
void setAprilTagNbThreads(int nThreads)
void setAprilTagPoseEstimationMethod(const vpPoseEstimationMethod &poseEstimationMethod)
size_t getNbObjects() const
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:130
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Class that defines generic functionalities for display.
Definition: vpDisplay.h:178
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
static void display(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), const std::string &frameName="", const vpColor &textColor=vpColor::black, const vpImagePoint &textOffset=vpImagePoint(15, 15))
static void flush(const vpImage< unsigned char > &I)
static void displayText(const vpImage< unsigned char > &I, const vpImagePoint &ip, const std::string &s, const vpColor &color)
error that can be emitted by ViSP classes.
Definition: vpException.h:60
const char * getMessage() const
Definition: vpException.cpp:65
static void convert(const vpImage< unsigned char > &src, vpImage< vpRGBa > &dest)
static double getMedian(const std::vector< double > &v)
Definition: vpMath.cpp:322
static double getStdev(const std::vector< double > &v, bool useBesselCorrection=false)
Definition: vpMath.cpp:353
static double getMean(const std::vector< double > &v)
Definition: vpMath.cpp:302
Class that is a wrapper over the Video4Linux2 (V4L2) driver.
void open(vpImage< unsigned char > &I)
void setScale(unsigned scale=vpV4l2Grabber::DEFAULT_SCALE)
void setDevice(const std::string &devname)
void acquire(vpImage< unsigned char > &I)
XML parser to load and save intrinsic camera parameters.
int parse(vpCameraParameters &cam, const std::string &filename, const std::string &camera_name, const vpCameraParameters::vpCameraParametersProjType &projModel, unsigned int image_width=0, unsigned int image_height=0, bool verbose=true)
VISP_EXPORT double measureTimeMs()