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mrpt::vision::CCamModel Class Reference
[mrpt-vision]

Detailed Description

This class represent a pinhole camera model for Monocular SLAM and implements some associated Jacobians.

The camera parameters are accessible in the public member CCamModel::cam

See also
mrpt::utils::TCamera, CMonoSlam, the application camera-calib-gui for calibrating a camera

Definition at line 36 of file CCamModel.h.

#include <mrpt/vision/CCamModel.h>

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Inheritance graph

Classes

struct  CameraTempVariables
 

Public Member Functions

 CCamModel ()
 Default Constructor. More...
 
void loadFromConfigFile (const mrpt::utils::CConfigFileBase &source, const std::string &section) override
 This method load the options from a ".ini"-like file or memory-stored string list. More...
 
void dumpToTextStream (mrpt::utils::CStream &out) const override
 This method displays clearly all the contents of the structure in textual form, sending it to a CStream. More...
 
 CCamModel (const mrpt::utils::CConfigFileBase &cfgIni)
 Constructor from a ini file. More...
 
void jacob_undistor_fm (const mrpt::utils::TPixelCoordf &uvd, math::CMatrixDouble &J_undist)
 Jacobian for undistortion the image coordinates. More...
 
void jacob_undistor (const mrpt::utils::TPixelCoordf &p, mrpt::math::CMatrixDouble &J_undist)
 Calculate the image coordinates undistorted. More...
 
void distort_a_point (const mrpt::utils::TPixelCoordf &p, mrpt::utils::TPixelCoordf &distorted_p)
 Return the pixel position distorted by the camera. More...
 
void undistort_point (const mrpt::utils::TPixelCoordf &p, mrpt::utils::TPixelCoordf &undistorted_p)
 Return the pixel position undistorted by the camera The input values 'col' and 'row' will be replace for the new values (undistorted) More...
 
void project_3D_point (const mrpt::math::TPoint3D &p3D, mrpt::utils::TPixelCoordf &distorted_p) const
 Return the (distorted) pixel position of a 3D point given in coordinates relative to the camera (+Z pointing forward, +X to the right) More...
 
void unproject_3D_point (const mrpt::utils::TPixelCoordf &distorted_p, mrpt::math::TPoint3D &p3D) const
 Return the 3D location of a point (at a fixed distance z=1), for the given (distorted) pixel position. More...
 
void jacobian_project_with_distortion (const mrpt::math::TPoint3D &p3D, math::CMatrixDouble &dh_dy) const
 Jacobian of the projection of 3D points (with distortion), as done in project_3D_point $ \frac{\partial h}{\partial y} $, evaluated at the point p3D (read below the full explanation) More...
 
void jacobian_unproject_with_distortion (const mrpt::utils::TPixelCoordf &p, math::CMatrixDouble &dy_dh) const
 Jacobian of the unprojection of a pixel (with distortion) back into a 3D point, as done in unproject_3D_point $ \frac{\partial y}{\partial h} $, evaluated at the pixel p. More...
 
template<typename T , typename POINT >
void getTemporaryVariablesForTransform (const POINT &p, CameraTempVariables< T > &v) const
 
template<typename T , typename POINT , typename PIXEL >
void getFullProjection (const POINT &pIn, PIXEL &pOut) const
 
template<typename T , typename PIXEL >
void getFullProjectionT (const CameraTempVariables< T > &tmp, PIXEL &pOut) const
 
template<typename T , typename POINT , typename MATRIX >
void getFullJacobian (const POINT &pIn, MATRIX &mOut) const
 
template<typename T , typename POINT , typename MATRIX >
void getFullJacobianT (const POINT &pIn, const CameraTempVariables< T > &tmp, MATRIX &mOut) const
 
template<typename POINTIN , typename POINTOUT , typename MAT22 >
void getFullInverseModelWithJacobian (const POINTIN &pIn, POINTOUT &pOut, MAT22 &jOut) const
 
void loadFromConfigFileName (const std::string &config_file, const std::string &section)
 Behaves like loadFromConfigFile, but you can pass directly a file name and a temporary CConfigFile object will be created automatically to load the file. More...
 
virtual void saveToConfigFile (mrpt::utils::CConfigFileBase &target, const std::string &section) const
 This method saves the options to a ".ini"-like file or memory-stored string list. More...
 
void saveToConfigFileName (const std::string &config_file, const std::string &section) const
 Behaves like saveToConfigFile, but you can pass directly a file name and a temporary CConfigFile object will be created automatically to save the file. More...
 
void dumpToConsole () const
 Just like dumpToTextStream() but sending the text to the console (std::cout) More...
 

Public Attributes

mrpt::utils::TCamera cam
 The parameters of a camera. More...
 

Static Protected Member Functions

static void dumpVar_int (CStream &out, const char *varName, int v)
 Used to print variable info from dumpToTextStream with the macro LOADABLEOPTS_DUMP_VAR. More...
 
static void dumpVar_float (CStream &out, const char *varName, float v)
 
static void dumpVar_double (CStream &out, const char *varName, double v)
 
static void dumpVar_bool (CStream &out, const char *varName, bool v)
 
static void dumpVar_string (CStream &out, const char *varName, const std::string &v)
 

Private Member Functions

mrpt::math::CMatrixFixedNumeric< double, 2, 2 > firstInverseJacobian () const
 
mrpt::math::CMatrixFixedNumeric< double, 4, 2 > secondInverseJacobian () const
 
mrpt::math::CMatrixFixedNumeric< double, 3, 4 > thirdInverseJacobian () const
 

Constructor & Destructor Documentation

◆ CCamModel() [1/2]

CCamModel::CCamModel ( )

Default Constructor.

Constructor.

Definition at line 23 of file CCamModel.cpp.

◆ CCamModel() [2/2]

mrpt::vision::CCamModel::CCamModel ( const mrpt::utils::CConfigFileBase &  cfgIni)

Constructor from a ini file.

Member Function Documentation

◆ distort_a_point()

void CCamModel::distort_a_point ( const mrpt::utils::TPixelCoordf &  p,
mrpt::utils::TPixelCoordf &  distorted_p 
)

Return the pixel position distorted by the camera.

Definition at line 103 of file CCamModel.cpp.

References cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), mrpt::utils::TCamera::k1(), mrpt::math::square(), mrpt::utils::TPixelCoordf::x, and mrpt::utils::TPixelCoordf::y.

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◆ dumpToConsole()

void CLoadableOptions::dumpToConsole ( ) const
inherited

Just like dumpToTextStream() but sending the text to the console (std::cout)

Definition at line 44 of file CLoadableOptions.cpp.

References mrpt::utils::CLoadableOptions::dumpToTextStream(), and loadable_opts_my_cout.

Referenced by mrpt::hmtslam::CTopLCDetector_GridMatching::computeTopologicalObservationModel(), and mrpt::graphslam::optimizers::CLevMarqGSO< GRAPH_T >::printParams().

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◆ dumpToTextStream()

void CCamModel::dumpToTextStream ( mrpt::utils::CStream &  out) const
overridevirtual

This method displays clearly all the contents of the structure in textual form, sending it to a CStream.

Reimplemented from mrpt::utils::CLoadableOptions.

Definition at line 332 of file CCamModel.cpp.

References MRPT_UNUSED_PARAM.

◆ dumpVar_bool()

void CLoadableOptions::dumpVar_bool ( CStream &  out,
const char *  varName,
bool  v 
)
staticprotectedinherited

Definition at line 65 of file CLoadableOptions.cpp.

References LOADABLEOPTS_COLUMN_WIDTH, and mrpt::utils::CStream::printf().

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◆ dumpVar_double()

void CLoadableOptions::dumpVar_double ( CStream &  out,
const char *  varName,
double  v 
)
staticprotectedinherited

Definition at line 59 of file CLoadableOptions.cpp.

References LOADABLEOPTS_COLUMN_WIDTH, and mrpt::utils::CStream::printf().

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◆ dumpVar_float()

void CLoadableOptions::dumpVar_float ( CStream &  out,
const char *  varName,
float  v 
)
staticprotectedinherited

Definition at line 54 of file CLoadableOptions.cpp.

References LOADABLEOPTS_COLUMN_WIDTH, and mrpt::utils::CStream::printf().

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◆ dumpVar_int()

void CLoadableOptions::dumpVar_int ( CStream &  out,
const char *  varName,
int  v 
)
staticprotectedinherited

Used to print variable info from dumpToTextStream with the macro LOADABLEOPTS_DUMP_VAR.

Definition at line 49 of file CLoadableOptions.cpp.

References LOADABLEOPTS_COLUMN_WIDTH, and mrpt::utils::CStream::printf().

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◆ dumpVar_string()

void CLoadableOptions::dumpVar_string ( CStream &  out,
const char *  varName,
const std::string &  v 
)
staticprotectedinherited

Definition at line 71 of file CLoadableOptions.cpp.

References LOADABLEOPTS_COLUMN_WIDTH, and mrpt::utils::CStream::printf().

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◆ firstInverseJacobian()

mrpt::math::CMatrixFixedNumeric<double, 2, 2> mrpt::vision::CCamModel::firstInverseJacobian ( ) const
inlineprivate

Definition at line 251 of file CCamModel.h.

Referenced by getFullInverseModelWithJacobian().

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◆ getFullInverseModelWithJacobian()

template<typename POINTIN , typename POINTOUT , typename MAT22 >
void mrpt::vision::CCamModel::getFullInverseModelWithJacobian ( const POINTIN &  pIn,
POINTOUT &  pOut,
MAT22 &  jOut 
) const
inline

Definition at line 283 of file CCamModel.h.

References cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), firstInverseJacobian(), mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::utils::TCamera::k1(), mrpt::utils::TCamera::k2(), mrpt::utils::TCamera::k3(), mrpt::utils::TCamera::p1(), mrpt::utils::TCamera::p2(), secondInverseJacobian(), mrpt::mrpt::math::square(), mrpt::math::square(), and thirdInverseJacobian().

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◆ getFullJacobian()

template<typename T , typename POINT , typename MATRIX >
void mrpt::vision::CCamModel::getFullJacobian ( const POINT &  pIn,
MATRIX &  mOut 
) const
inline

Definition at line 200 of file CCamModel.h.

References getFullJacobianT(), and getTemporaryVariablesForTransform().

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◆ getFullJacobianT()

template<typename T , typename POINT , typename MATRIX >
void mrpt::vision::CCamModel::getFullJacobianT ( const POINT &  pIn,
const CameraTempVariables< T > &  tmp,
MATRIX &  mOut 
) const
inline

Definition at line 208 of file CCamModel.h.

References cam, mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::vision::CCamModel::CameraTempVariables< T >::K, mrpt::utils::TCamera::k1(), mrpt::utils::TCamera::k2(), mrpt::utils::TCamera::k3(), mrpt::utils::TCamera::p1(), mrpt::utils::TCamera::p2(), mrpt::vision::CCamModel::CameraTempVariables< T >::R, mrpt::math::square(), mrpt::vision::CCamModel::CameraTempVariables< T >::x_, and mrpt::vision::CCamModel::CameraTempVariables< T >::y_.

Referenced by getFullJacobian().

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◆ getFullProjection()

template<typename T , typename POINT , typename PIXEL >
void mrpt::vision::CCamModel::getFullProjection ( const POINT &  pIn,
PIXEL &  pOut 
) const
inline

Definition at line 184 of file CCamModel.h.

References getFullProjectionT(), and getTemporaryVariablesForTransform().

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◆ getFullProjectionT()

template<typename T , typename PIXEL >
void mrpt::vision::CCamModel::getFullProjectionT ( const CameraTempVariables< T > &  tmp,
PIXEL &  pOut 
) const
inline

Definition at line 192 of file CCamModel.h.

References cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::vision::CCamModel::CameraTempVariables< T >::x__, and mrpt::vision::CCamModel::CameraTempVariables< T >::y__.

Referenced by getFullProjection().

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◆ getTemporaryVariablesForTransform()

template<typename T , typename POINT >
void mrpt::vision::CCamModel::getTemporaryVariablesForTransform ( const POINT &  p,
CameraTempVariables< T > &  v 
) const
inline

Definition at line 169 of file CCamModel.h.

References cam, mrpt::utils::TCamera::k1(), mrpt::utils::TCamera::k2(), mrpt::utils::TCamera::k3(), mrpt::utils::TCamera::p1(), mrpt::utils::TCamera::p2(), and mrpt::math::square().

Referenced by getFullJacobian(), and getFullProjection().

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◆ jacob_undistor()

void CCamModel::jacob_undistor ( const mrpt::utils::TPixelCoordf &  p,
mrpt::math::CMatrixDouble &  J_undist 
)

Calculate the image coordinates undistorted.

Definition at line 56 of file CCamModel.cpp.

References cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), mrpt::utils::TCamera::k1(), and mrpt::math::square().

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◆ jacob_undistor_fm()

void CCamModel::jacob_undistor_fm ( const mrpt::utils::TPixelCoordf &  uvd,
math::CMatrixDouble &  J_undist 
)

Jacobian for undistortion the image coordinates.

Definition at line 25 of file CCamModel.cpp.

References cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::utils::TCamera::k1(), and mrpt::utils::TCamera::k2().

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◆ jacobian_project_with_distortion()

void CCamModel::jacobian_project_with_distortion ( const mrpt::math::TPoint3D &  p3D,
math::CMatrixDouble &  dh_dy 
) const

Jacobian of the projection of 3D points (with distortion), as done in project_3D_point $ \frac{\partial h}{\partial y} $, evaluated at the point p3D (read below the full explanation)

We define $ h = (h_x ~ h_y) $ as the projected point in pixels (origin at the top-left corner), and $ y=( y_x ~ y_y ~ y_z ) $ as the 3D point in space, in coordinates relative to the camera (+Z pointing forwards).

Then this method computes the 2x3 Jacobian:

\[ \frac{\partial h}{\partial y} = \frac{\partial h}{\partial u} \frac{\partial u}{\partial y} \]

With:

\[ \frac{\partial u}{\partial y} = \left( \begin{array}{ccc} \frac{f_x}{y_z} & 0 & - y \frac{f_x}{y_z^2} \\ 0 & \frac{f_y}{y_z} & - y \frac{f_y}{y_z^2} \\ \end{array} \right) \]

where $ f_x, f_y $ is the focal length in units of pixel sizes in x and y, respectively. And, if we define:

\[ f = 1+ 2 k_1 (u_x^2+u_y^2) \]

then:

\[ \frac{\partial h}{\partial u} = \left( \begin{array}{cc} \frac{ 1+2 k_1 u_y^2 }{f^{3/2}} & -\frac{2 u_x u_y k_1 }{f^{3/2}} \\ -\frac{2 u_x u_y k_1 }{f^{3/2}} & \frac{ 1+2 k_1 u_x^2 }{f^{3/2}} \end{array} \right) \]

Note
JLBC: Added in March, 2009. Should be equivalent to Davison's WideCamera::ProjectionJacobian
See also
project_3D_point

Definition at line 200 of file CCamModel.cpp.

References ASSERT_, cam, mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::utils::TCamera::k1(), mrpt::math::square(), mrpt::math::TPoint3D::x, mrpt::math::TPoint3D::y, and mrpt::math::TPoint3D::z.

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◆ jacobian_unproject_with_distortion()

void CCamModel::jacobian_unproject_with_distortion ( const mrpt::utils::TPixelCoordf &  p,
math::CMatrixDouble &  dy_dh 
) const

Jacobian of the unprojection of a pixel (with distortion) back into a 3D point, as done in unproject_3D_point $ \frac{\partial y}{\partial h} $, evaluated at the pixel p.

Note
JLBC: Added in March, 2009. Should be equivalent to Davison's WideCamera::UnprojectionJacobian
See also
unproject_3D_point

Definition at line 265 of file CCamModel.cpp.

References cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::utils::TCamera::k1(), and mrpt::math::square().

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◆ loadFromConfigFile()

void CCamModel::loadFromConfigFile ( const mrpt::utils::CConfigFileBase &  source,
const std::string &  section 
)
overridevirtual

This method load the options from a ".ini"-like file or memory-stored string list.

Only those parameters found in the given "section" and having the same name that the variable are loaded. Those not found in the file will stay with their previous values (usually the default values loaded at initialization). An example of an ".ini" file:

[section]
resolution = 0.10 // blah blah...
modeSelection = 1 // 0=blah, 1=blah,...
See also
loadFromConfigFileName, saveToConfigFile

Implements mrpt::utils::CLoadableOptions.

Definition at line 300 of file CCamModel.cpp.

References ASSERT_, cam, MRPT_END, MRPT_LOAD_HERE_CONFIG_VAR_NO_DEFAULT, MRPT_START, mrpt::utils::TCamera::setDistortionParamsVector(), and mrpt::utils::TCamera::setIntrinsicParamsFromValues().

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◆ loadFromConfigFileName()

void CLoadableOptions::loadFromConfigFileName ( const std::string &  config_file,
const std::string &  section 
)
inherited

Behaves like loadFromConfigFile, but you can pass directly a file name and a temporary CConfigFile object will be created automatically to load the file.

See also
loadFromConfigFile

Definition at line 22 of file CLoadableOptions.cpp.

References mrpt::utils::CLoadableOptions::loadFromConfigFile().

Referenced by mrpt::graphslam::optimizers::CLevMarqGSO< GRAPH_T >::loadParams().

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◆ project_3D_point()

void CCamModel::project_3D_point ( const mrpt::math::TPoint3D &  p3D,
mrpt::utils::TPixelCoordf &  distorted_p 
) const

Return the (distorted) pixel position of a 3D point given in coordinates relative to the camera (+Z pointing forward, +X to the right)

See also
unproject_3D_point

Definition at line 150 of file CCamModel.cpp.

References ASSERT_, cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::utils::TCamera::k1(), mrpt::math::square(), mrpt::utils::TPixelCoordf::x, mrpt::math::TPoint3D::x, mrpt::utils::TPixelCoordf::y, mrpt::math::TPoint3D::y, and mrpt::math::TPoint3D::z.

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◆ saveToConfigFile()

void CLoadableOptions::saveToConfigFile ( mrpt::utils::CConfigFileBase &  target,
const std::string &  section 
) const
virtualinherited

This method saves the options to a ".ini"-like file or memory-stored string list.

See also
loadFromConfigFile, saveToConfigFileName

Reimplemented in mrpt::vision::TMultiResDescOptions, mrpt::vision::TMultiResDescMatchOptions, mrpt::nav::CPTG_RobotShape_Circular, mrpt::nav::CPTG_RobotShape_Polygonal, mrpt::nav::CParameterizedTrajectoryGenerator, mrpt::nav::CAbstractPTGBasedReactive::TAbstractPTGNavigatorParams, mrpt::nav::CAbstractNavigator::TAbstractNavigatorParams, mrpt::nav::CPTG_DiffDrive_CollisionGridBased, mrpt::nav::CWaypointsNavigator::TWaypointsNavigatorParams, mrpt::nav::CHolonomicFullEval::TOptions, mrpt::bayes::CParticleFilter::TParticleFilterOptions, mrpt::nav::CReactiveNavigationSystem::TReactiveNavigatorParams, mrpt::nav::CHolonomicND::TOptions, mrpt::nav::CMultiObjectiveMotionOptimizerBase::TParamsBase, mrpt::nav::CHolonomicVFF::TOptions, mrpt::maps::CPointCloudFilterByDistance::TOptions, mrpt::nav::CPTG_DiffDrive_C, mrpt::nav::CPTG_DiffDrive_alpha, mrpt::nav::CMultiObjMotionOpt_Scalarization::TParams, mrpt::nav::CPTG_DiffDrive_CC, mrpt::nav::CPTG_DiffDrive_CCS, mrpt::nav::CPTG_DiffDrive_CS, and mrpt::nav::CPTG_Holo_Blend.

Definition at line 29 of file CLoadableOptions.cpp.

References MRPT_UNUSED_PARAM.

Referenced by mrpt::utils::CLoadableOptions::dumpToTextStream(), and mrpt::utils::CLoadableOptions::saveToConfigFileName().

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◆ saveToConfigFileName()

void CLoadableOptions::saveToConfigFileName ( const std::string &  config_file,
const std::string &  section 
) const
inherited

Behaves like saveToConfigFile, but you can pass directly a file name and a temporary CConfigFile object will be created automatically to save the file.

See also
saveToConfigFile, loadFromConfigFileName

Definition at line 37 of file CLoadableOptions.cpp.

References mrpt::utils::CLoadableOptions::saveToConfigFile().

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◆ secondInverseJacobian()

mrpt::math::CMatrixFixedNumeric<double, 4, 2> mrpt::vision::CCamModel::secondInverseJacobian ( ) const
inlineprivate

Definition at line 258 of file CCamModel.h.

Referenced by getFullInverseModelWithJacobian().

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◆ thirdInverseJacobian()

mrpt::math::CMatrixFixedNumeric<double, 3, 4> mrpt::vision::CCamModel::thirdInverseJacobian ( ) const
inlineprivate

Definition at line 267 of file CCamModel.h.

Referenced by getFullInverseModelWithJacobian().

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◆ undistort_point()

void CCamModel::undistort_point ( const mrpt::utils::TPixelCoordf &  p,
mrpt::utils::TPixelCoordf &  undistorted_p 
)

Return the pixel position undistorted by the camera The input values 'col' and 'row' will be replace for the new values (undistorted)

Definition at line 125 of file CCamModel.cpp.

References ASSERT_, cam, mrpt::utils::TCamera::getDistortionParamsAsVector(), mrpt::utils::TCamera::intrinsicParams, and mrpt::vision::pinhole::undistort_points().

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◆ unproject_3D_point()

void CCamModel::unproject_3D_point ( const mrpt::utils::TPixelCoordf &  distorted_p,
mrpt::math::TPoint3D &  p3D 
) const

Return the 3D location of a point (at a fixed distance z=1), for the given (distorted) pixel position.

See also
project_3D_point
Note
Of course, there is a depth ambiguity, so the returned 3D point must be considered a direction from the camera focus, or a vector, rather than a meaninful physical point.

Definition at line 179 of file CCamModel.cpp.

References cam, mrpt::utils::TCamera::cx(), mrpt::utils::TCamera::cy(), mrpt::utils::TCamera::fx(), mrpt::utils::TCamera::fy(), mrpt::utils::TCamera::k1(), mrpt::math::square(), mrpt::utils::TPixelCoordf::x, mrpt::math::TPoint3D::x, mrpt::utils::TPixelCoordf::y, mrpt::math::TPoint3D::y, and mrpt::math::TPoint3D::z.

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Member Data Documentation

◆ cam

mrpt::utils::TCamera mrpt::vision::CCamModel::cam

The parameters of a camera.

Definition at line 40 of file CCamModel.h.

Referenced by distort_a_point(), getFullInverseModelWithJacobian(), getFullJacobianT(), getFullProjectionT(), getTemporaryVariablesForTransform(), jacob_undistor(), jacob_undistor_fm(), jacobian_project_with_distortion(), jacobian_unproject_with_distortion(), loadFromConfigFile(), project_3D_point(), undistort_point(), and unproject_3D_point().



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