Visual Servoing Platform  version 3.3.1 under development (2020-08-12)
grabRealSense2_T265.cpp

This example shows how to retrieve both images, odometry and motion data from a RealSense T265 sensor with librealsense2 at 30Hz.

Note
IMU X-axis and Z-axis are opposite to pose's frame X and Z axes.
/****************************************************************************
*
* ViSP, open source Visual Servoing Platform software.
* Copyright (C) 2005 - 2019 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 http://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:
* Acquisition of images, odometry and raw motion information with RealSense
* T265 sensor and librealsense2.
*
*****************************************************************************/
#include <iostream>
#include <iomanip>
#include <visp3/core/vpMeterPixelConversion.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/sensor/vpRealSense2.h>
#if defined(VISP_HAVE_REALSENSE2) && (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11) && \
(defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI)) && \
(RS2_API_VERSION > ((2 * 10000) + (31 * 100) + 0))
int main()
{
vpHomogeneousMatrix cMw, cMw_0;
vpHomogeneousMatrix cextMw(0, 0, 2, 0, 0, 0); // External camera view for pose visualization
vpColVector odo_vel, odo_acc, imu_acc, imu_vel;
unsigned int confidence;
double ts;
vpImagePoint frame_origin;
std::list< std::pair<unsigned int, vpImagePoint> > frame_origins; // Frame origin's history for trajectory visualization
unsigned int display_scale = 2;
try {
std::string product_line = rs.getProductLine();
std::cout << "Product line: " << product_line << std::endl;
if (product_line != "T200") {
std::cout << "This example doesn't support devices that are not part of T200 product line family !" << std::endl;
return EXIT_SUCCESS;
}
rs2::config config;
config.enable_stream(RS2_STREAM_POSE, RS2_FORMAT_6DOF);
config.enable_stream(RS2_STREAM_FISHEYE, 1, RS2_FORMAT_Y8);
config.enable_stream(RS2_STREAM_FISHEYE, 2, RS2_FORMAT_Y8);
config.enable_stream(RS2_STREAM_GYRO);
config.enable_stream(RS2_STREAM_ACCEL);
rs.open(config);
// Creating images for left and right cameras, and for visualizing trajectory
vpImage<unsigned char> I_left, I_right;
vpImage<unsigned char> I_pose(300, 300, 0);
vpCameraParameters cam(300., 300., I_pose.getWidth()/2, I_pose.getHeight()/2); // For pose visualization
rs.acquire(&I_left, &I_right, &cMw_0, &odo_vel, &odo_acc, &imu_vel, &imu_acc, &confidence, &ts);
#if defined(VISP_HAVE_X11)
vpDisplayX display_left; // Left image
vpDisplayX display_right; // Right image
vpDisplayX display_pose; // Pose visualization
#elif defined(VISP_HAVE_GDI)
vpDisplayGDI display_left; // Left image
vpDisplayGDI display_right; // Right image
vpDisplayGDI display_pose; // Pose visualization
#endif
#if defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI)
display_left.setDownScalingFactor(display_scale);
display_right.setDownScalingFactor(display_scale);
display_left.init(I_left, 10, 10, "Left image");
display_right.init(I_right, static_cast<int>(I_left.getWidth()/display_scale) + 80, 10, "Right image"); // Right
display_pose.init(I_pose, 10, static_cast<int>(I_left.getHeight()/display_scale) + 80, "Pose visualizer"); // visualization
#endif
vpHomogeneousMatrix cextMc_0 = cextMw * cMw_0.inverse();
vpMeterPixelConversion::convertPoint(cam, cextMc_0[0][3] / cextMc_0[2][3], cextMc_0[1][3] / cextMc_0[2][3], frame_origin);
frame_origins.push_back(std::make_pair(confidence, frame_origin));
while (true) {
double t = vpTime::measureTimeMs();
rs.acquire(&I_left, &I_right, &cMw, &odo_vel, &odo_acc, &imu_vel, &imu_acc, &confidence, &ts);
vpHomogeneousMatrix cextMc = cextMw * cMw.inverse();
vpMeterPixelConversion::convertPoint(cam, cextMc[0][3] / cextMc[2][3], cextMc[1][3] / cextMc[2][3], frame_origin);
frame_origins.push_back(std::make_pair(confidence, frame_origin));
vpDisplay::displayText(I_left, 15*display_scale, 15*display_scale, "Click to quit", vpColor::red);
vpDisplay::displayText(I_right, 15*display_scale, 15*display_scale, "Click to quit", vpColor::red);
vpDisplay::displayText(I_pose, 15, 15, "Click to quit", vpColor::red);
vpDisplay::displayFrame(I_pose, cextMc_0, cam, 0.1, vpColor::none, 2); // First frame
vpDisplay::displayFrame(I_pose, cextMc , cam, 0.1, vpColor::none, 2);
// Display frame origin trajectory
{
std::list< std::pair<unsigned int, vpImagePoint> >::const_iterator it = frame_origins.begin();
std::pair<unsigned int, vpImagePoint> frame_origin_pair_prev = *(it++);
for (; it != frame_origins.end(); ++it) {
if (vpImagePoint::distance(frame_origin_pair_prev.second, (*it).second) > 1) {
vpDisplay::displayLine(I_pose, frame_origin_pair_prev.second, (*it).second,
(*it).first == 3 ? vpColor::green : ((*it).first == 2 ? vpColor::yellow : vpColor::red), 2);
frame_origin_pair_prev = *it;
}
}
}
if (vpDisplay::getClick(I_left, false) || vpDisplay::getClick(I_right, false) || vpDisplay::getClick(I_pose, false)) {
break;
}
vpDisplay::flush(I_right);
std::cout << "Loop time: " << std::setw(8) << vpTime::measureTimeMs() - t << "ms. Confidence = " << confidence;
std::cout << " Gyro vel: x = " << std::setw(10) << std::setprecision(3) << imu_vel[0] << " y = " << std::setw(10) << std::setprecision(3) << imu_vel[1] << " z = " << std::setw(8) << imu_vel[2];
std::cout << " Accel: x = " << std::setw(10) << std::setprecision(3) << imu_acc[0] << " y = " << std::setw(10) << std::setprecision(3) << imu_acc[1] << " z = " << std::setw(8) << imu_acc[2];
std::cout << std::endl;
}
} catch (const vpException &e) {
std::cerr << "RealSense error " << e.what() << std::endl;
} catch (const std::exception &e) {
std::cerr << e.what() << std::endl;
}
return EXIT_SUCCESS;
}
#else
int main()
{
#if !defined(VISP_HAVE_REALSENSE2)
std::cout << "You do not realsense2 SDK functionality enabled..." << std::endl;
std::cout << "Tip:" << std::endl;
std::cout << "- Install librealsense2, configure again ViSP using cmake and build again this example" << std::endl;
return EXIT_SUCCESS;
#elif (VISP_CXX_STANDARD < VISP_CXX_STANDARD_11)
std::cout << "You do not build ViSP with c++11 or higher compiler flag" << std::endl;
std::cout << "Tip:" << std::endl;
std::cout << "- Configure ViSP again using cmake -DUSE_CXX_STANDARD=11, and build again this example" << std::endl;
#elif !(defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI))
std::cout << "You don't have X11 or GDI display capabilities" << std::endl;
#elif !(RS2_API_VERSION > ((2 * 10000) + (31 * 100) + 0))
std::cout << "Install librealsense version > 2.31.0" << std::endl;
#endif
return EXIT_SUCCESS;
}
#endif