CObservationStereoImagesFeatures.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2018, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */
#ifndef CObservationStereoImagesFeatures_H
#define CObservationStereoImagesFeatures_H

#include <mrpt/serialization/CSerializable.h>
#include <mrpt/img/CImage.h>
#include <mrpt/img/TCamera.h>
#include <mrpt/obs/CObservation.h>
#include <mrpt/poses/CPose3D.h>
#include <mrpt/poses/CPose3DQuat.h>
#include <mrpt/poses/CPose2D.h>

namespace mrpt::obs
{
struct TStereoImageFeatures
{
    std::pair<mrpt::img::TPixelCoordf, mrpt::img::TPixelCoordf> pixels;
    unsigned int ID;
};

/** Declares a class derived from "CObservation" that encapsules a pair of
 cameras and a set of matched image features extracted from them.
 *
 <b>NOTE:</b> The image features stored in this class are NOT supposed to be
 UNDISTORTED, but the TCamera members must provide their distortion params.
 A zero-vector of distortion params means a set of UNDISTORTED pixels.<br>
 * \sa CObservation
 * \ingroup mrpt_obs_grp
 */
class CObservationStereoImagesFeatures : public CObservation
{
    DEFINE_SERIALIZABLE(CObservationStereoImagesFeatures)

   public:
    CObservationStereoImagesFeatures() = default;
    /** Other constructor providing members initialization.
     */
    CObservationStereoImagesFeatures(
        const mrpt::img::TCamera& cLeft /*left camera*/,
        const mrpt::img::TCamera& cRight /*right camera*/,
        const mrpt::poses::CPose3DQuat& rCPose /*rightCameraPose*/,
        const mrpt::poses::CPose3DQuat& cPORobot /*cameraPoseOnRobot*/);

    /** A method for storing the set of observed features in a text file in the
     * format: <br>
     * ID ul vl ur vr <br>
     * being (ul,vl) and (ur,vr) the "x" and "y" coordinates for the left and
     * right feature, respectively.
     */
    void saveFeaturesToTextFile(const std::string& filename);

    // ------------------
    // Class Members
    // ------------------
    mrpt::img::TCamera cameraLeft, cameraRight;

    /** The pose of the right camera, relative to the left one:
     *  Note that for the Bumblebee stereo camera and using the conventional
     * reference coordinates for the left
     *   camera ("x" points to the right, "y" down), the "right" camera is
     * situated
     *   at position (BL, 0, 0) with q = [1 0 0 0], where BL is the BASELINE.
     */
    mrpt::poses::CPose3DQuat rightCameraPose;

    /** The pose of the LEFT camera, relative to the robot.
     */
    mrpt::poses::CPose3DQuat cameraPoseOnRobot;

    /** Vectors of image feature pairs (with ID).
     */
    std::vector<TStereoImageFeatures> theFeatures;

    // See base class docs
    void getSensorPose(mrpt::poses::CPose3D& out_sensorPose) const override
    {
        out_sensorPose = mrpt::poses::CPose3D(cameraPoseOnRobot);
    }
    // See base class docs
    void getSensorPose(mrpt::poses::CPose3DQuat& out_sensorPose) const
    {
        out_sensorPose = cameraPoseOnRobot;
    }
    // See base class docs
    void getDescriptionAsText(std::ostream& o) const override;

    /** A general method to change the sensor pose on the robot in a
     * mrpt::poses::CPose3D form.
     *  Note that most sensors will use the full (6D) CPose3DQuat, but see the
     * derived classes for more details or special cases.
     * \sa getSensorPose
     */
    inline void setSensorPose(
        const mrpt::poses::CPose3D& newSensorPose) override
    {
        cameraPoseOnRobot = mrpt::poses::CPose3DQuat(newSensorPose);
    }

    /** A general method to change the sensor pose on the robot in a CPose3DQuat
     * form.
     *  Note that most sensors will use the full (6D) CPose3DQuat, but see the
     * derived classes for more details or special cases.
     * \sa getSensorPose
     */
    inline void setSensorPose(const mrpt::poses::CPose3DQuat& newSensorPose)
    {
        cameraPoseOnRobot = newSensorPose;
    }
};  // End of class def.

}
#endif