PMatrixAffine Class Reference

#include <PMatrixAffine.h>

Inheritance diagram for PMatrixAffine:

List of all members.

Public Member Functions
	PMatrixAffine (void)
	~PMatrixAffine (void)
HomgPoint2D	project (const HomgPoint3D &X) const
	Return the image point which is the projection of the specified 3D point X.
HomgLine2D	project (const HomgLine3D &L) const
HomgLineSeg2D	project (const HomgLineSeg3D &L) const
vgl_homg_point_2d< double >	project (vgl_homg_point_3d< double > const &X) const
	Return the image point which is the projection of the specified 3D point X.
vgl_homg_line_2d< double >	project (vgl_homg_line_3d_2_points< double > const &L) const
	Return the image line which is the projection of the specified 3D line L.
vgl_line_segment_2d< double >	project (vgl_line_segment_3d< double > const &L) const
	Return the image linesegment which is the projection of the specified 3D linesegment L.
HomgPoint3D	backproject_pseudoinverse (const HomgPoint2D &x) const
vgl_homg_point_3d< double >	backproject_pseudoinverse (vgl_homg_point_2d< double > const &x) const
	Return the 3D point $ X$ which is $ X = P^+ x$.
HomgLine3D	backproject (const HomgPoint2D &x) const
HomgPlane3D	backproject (const HomgLine2D &l) const
vgl_homg_line_3d_2_points< double >	backproject (vgl_homg_point_2d< double > const &x) const
	Return the 3D line which is the backprojection of the specified image point, x.
vgl_homg_plane_3d< double >	backproject (vgl_homg_line_2d< double > const &l) const
	Return the 3D plane which is the backprojection of the specified line l in the image.
PMatrix	postmultiply (vnl_double_4x4 const &H) const
	post-multiply this projection matrix with a HMatrix3D.
PMatrix	premultiply (vnl_double_3x3 const &H) const
	pre-multiply this projection matrix with a HMatrix2D.
vnl_svd< double > *	svd () const
	Compute the svd of this P and cache it, so that future operations that require it need not recompute it.
void	clear_svd () const
	Discredit the cached svd.
HomgPoint3D	get_focal_point () const
vgl_homg_point_3d< double >	get_focal () const
	Return the 3D point representing the focal point of the camera.
HMatrix3D	get_canonical_H () const
	Return the HMatrix3D s.t. P * H = [I 0].
bool	is_canonical (double tol=0) const
	Return true iff P is [I 0].
bool	is_behind_camera (const HomgPoint3D &)
bool	is_behind_camera (vgl_homg_point_3d< double > const &)
	Return true if the 3D point X is behind the camera represented by this P.
void	flip_sign ()
	Change the overall sign of the P matrix.
bool	looks_conditioned ()
	Splendid hack that tries to detect if the P is an image-coords P or a normalized P.
void	fix_cheirality ()
	Scale P so determinant of first 3x3 is 1.
bool	operator== (PMatrix const &p) const
void	get (vnl_matrix< double > *A, vnl_vector< double > *a) const
	Return the 3x3 matrix and 3x1 column vector of P = [A a].
void	get (vnl_double_3x3 *A, vnl_double_3 *a) const
	Return the 3x3 matrix and 3x1 column vector of P = [A a].
double	get (unsigned int row_index, unsigned int col_index) const
	Return the element of the matrix at the specified indices.
void	get (double *c_matrix) const
	Return the 3x4 projection matrix in the array, p_matrix.
void	get (vnl_matrix< double > *p_matrix) const
void	get (vnl_double_3x4 *p_matrix) const
	Return the 3x4 projection matrix in the vnl_matrix<double>, p_matrix.
void	set (vnl_double_3x3 const &A, vnl_double_3 const &a)
	Set from 3x3 matrix and 3x1 column vector of P = [A a].
void	set (const double *p_matrix)
	Set the 3x4 projective matrix with the matrix in the array, p_matrix.
void	set (const double p_matrix[3][4])
	Set the 3x4 projective matrix with the matrix in the array, p_matrix.
void	set (const vnl_matrix< double > &p_matrix)
	Set the 3x4 projective matrix with the matrix in the array, p_matrix.
void	set (vnl_double_3x4 const &p_matrix)
	Set the fundamental matrix using the vnl_matrix<double> p_matrix.
void	get_rows (vnl_vector< double > *, vnl_vector< double > *, vnl_vector< double > *) const
	Return the rows of P = [a b c]'.
void	get_rows (vnl_double_4 *, vnl_double_4 *, vnl_double_4 *) const
	Return the rows of P = [a b c]'.
void	set_rows (const vnl_vector< double > &, const vnl_vector< double > &, const vnl_vector< double > &)
const vnl_double_3x4 &	get_matrix () const
bool	read_ascii (vcl_istream &f)
	Load from file.
void	ref ()
void	unref ()
int	get_references () const
bool	is_referenced () const
Static Public Member Functions
static PMatrix	read (const char *filename)
	Load from file.
static PMatrix	read (vcl_istream &)
	Load from vcl_istream.
Protected Attributes
vnl_double_3x4	p_matrix_
vnl_svd< double > *	svd_

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Detailed Description

Definition at line 20 of file PMatrixAffine.h.

---

Constructor & Destructor Documentation

PMatrixAffine::PMatrixAffine

(

void

)

[inline]

Definition at line 23 of file PMatrixAffine.h.

PMatrixAffine::~PMatrixAffine

(

void

)

[inline]

Definition at line 24 of file PMatrixAffine.h.

---

Member Function Documentation

HomgLine3D PMatrix::backproject

(

const HomgPoint2D &

x

)

const [inherited]

Definition at line 184 of file PMatrix.cxx.

HomgPlane3D PMatrix::backproject

(

const HomgLine2D &

l

)

const [inherited]

Definition at line 197 of file PMatrix.cxx.

vgl_homg_line_3d_2_points< double > PMatrix::backproject

(

vgl_homg_point_2d< double > const &

x

)

const [inherited]

Return the 3D line which is the backprojection of the specified image point, x.

Uses svd().

Definition at line 179 of file PMatrix.cxx.

vgl_homg_plane_3d< double > PMatrix::backproject

(

vgl_homg_line_2d< double > const &

l

)

const [inherited]

Return the 3D plane which is the backprojection of the specified line l in the image.

Definition at line 192 of file PMatrix.cxx.

HomgPoint3D PMatrix::backproject_pseudoinverse

(

const HomgPoint2D &

x

)

const [inherited]

Definition at line 170 of file PMatrix.cxx.

vgl_homg_point_3d< double > PMatrix::backproject_pseudoinverse

(

vgl_homg_point_2d< double > const &

x

)

const [inherited]

Return the 3D point $ X$ which is $ X = P^+ x$.

Equivalently, the 3D point of smallest norm such that . Uses svd().

Definition at line 164 of file PMatrix.cxx.

void PMatrix::clear_svd

(

)

const [inherited]

Discredit the cached svd.

This is necessary only in order to recover the space used by it if the PMatrix is not being deleted.

Definition at line 289 of file PMatrix.cxx.

void PMatrix::fix_cheirality

(

)

[inherited]

Scale P so determinant of first 3x3 is 1.

Definition at line 563 of file PMatrix.cxx.

void PMatrix::flip_sign

(

)

[inherited]

Change the overall sign of the P matrix.

Definition at line 612 of file PMatrix.cxx.

void PMatrix::get	(	vnl_matrix< double > *	A,
		vnl_vector< double > *	a
	)		const [inherited]

Return the 3x3 matrix and 3x1 column vector of P = [A a].

Definition at line 401 of file PMatrix.cxx.

void PMatrix::get	(	vnl_double_3x3 *	A,
		vnl_double_3 *	a
	)		const [inherited]

Return the 3x3 matrix and 3x1 column vector of P = [A a].

Definition at line 424 of file PMatrix.cxx.

double PMatrix::get	(	unsigned int	row_index,
		unsigned int	col_index
	)		const [inherited]

Return the element of the matrix at the specified indices.

Definition at line 372 of file PMatrix.cxx.

void PMatrix::get

(

double *

c_matrix

)

const [inherited]

Return the 3x4 projection matrix in the array, p_matrix.

Definition at line 381 of file PMatrix.cxx.

void PMatrix::get

(

vnl_matrix< double > *

p_matrix

)

const [inherited]

void PMatrix::get

(

vnl_double_3x4 *

p_matrix

)

const [inherited]

Return the 3x4 projection matrix in the vnl_matrix<double>, p_matrix.

Definition at line 392 of file PMatrix.cxx.

HMatrix3D PMatrix::get_canonical_H

(

)

const [inherited]

Return the HMatrix3D s.t. P * H = [I 0].

If P = [A a], then H = [inv(A) -inv(A)*a; 0 0 0 1];

Definition at line 335 of file PMatrix.cxx.

vgl_homg_point_3d< double > PMatrix::get_focal

(

)

const [inherited]

Return the 3D point representing the focal point of the camera.

Uses svd().

Definition at line 298 of file PMatrix.cxx.

HomgPoint3D PMatrix::get_focal_point

(

)

const [inherited]

Definition at line 312 of file PMatrix.cxx.

const vnl_double_3x4& PMatrix::get_matrix

(

)

const [inline, inherited]

Definition at line 140 of file PMatrix.h.

void PMatrix::get_rows	(	vnl_vector< double > *	a,
		vnl_vector< double > *	b,
		vnl_vector< double > *	c
	)		const [inherited]

Return the rows of P = [a b c]'.

Definition at line 447 of file PMatrix.cxx.

void PMatrix::get_rows	(	vnl_double_4 *	a,
		vnl_double_4 *	b,
		vnl_double_4 *	c
	)		const [inherited]

Return the rows of P = [a b c]'.

Definition at line 469 of file PMatrix.cxx.

bool PMatrix::is_behind_camera

(

const HomgPoint3D &

hX

)

[inherited]

Definition at line 597 of file PMatrix.cxx.

bool PMatrix::is_behind_camera

(

vgl_homg_point_3d< double > const &

hX

)

[inherited]

Return true if the 3D point X is behind the camera represented by this P.

This depends on the overall sign of the P matrix having been set correctly, a la Hartley cheirality paper.

Definition at line 587 of file PMatrix.cxx.

bool PMatrix::is_canonical

(

double

tol = 0

)

const [inherited]

Return true iff P is [I 0].

Equality is assumed if the max abs diff is less than tol.

Definition at line 349 of file PMatrix.cxx.

bool PMatrix::looks_conditioned

(

)

[inherited]

Splendid hack that tries to detect if the P is an image-coords P or a normalized P.

Definition at line 621 of file PMatrix.cxx.

bool PMatrix::operator==

(

PMatrix const &

p

)

const [inline, inherited]

Definition at line 120 of file PMatrix.h.

PMatrix PMatrix::postmultiply

(

vnl_double_4x4 const &

H

)

const [inherited]

post-multiply this projection matrix with a HMatrix3D.

Postmultiply by 4x4 matrix.

Definition at line 629 of file PMatrix.cxx.

PMatrix PMatrix::premultiply

(

vnl_double_3x3 const &

H

)

const [inherited]

pre-multiply this projection matrix with a HMatrix2D.

Premultiply by 3x3 matrix.

Definition at line 635 of file PMatrix.cxx.

HomgPoint2D PMatrix::project

(

const HomgPoint3D &

X

)

const [inherited]

Return the image point which is the projection of the specified 3D point X.

Definition at line 123 of file PMatrix.cxx.

HomgLine2D PMatrix::project

(

const HomgLine3D &

L

)

const [inherited]

Definition at line 138 of file PMatrix.cxx.

HomgLineSeg2D PMatrix::project

(

const HomgLineSeg3D &

L

)

const [inherited]

Definition at line 154 of file PMatrix.cxx.

vgl_homg_point_2d<double> PMatrix::project

(

vgl_homg_point_3d< double > const &

X

)

const [inline, inherited]

Return the image point which is the projection of the specified 3D point X.

Definition at line 84 of file PMatrix.h.

vgl_homg_line_2d< double > PMatrix::project

(

vgl_homg_line_3d_2_points< double > const &

L

)

const [inherited]

Return the image line which is the projection of the specified 3D line L.

Definition at line 133 of file PMatrix.cxx.

vgl_line_segment_2d< double > PMatrix::project

(

vgl_line_segment_3d< double > const &

L

)

const [inherited]

Return the image linesegment which is the projection of the specified 3D linesegment L.

Definition at line 147 of file PMatrix.cxx.

PMatrix PMatrix::read

(

const char *

filename

)

[static, inherited]

Load from file.

Static method, so you can say

 PMatrix P = PMatrix::read("file.P");

Definition at line 250 of file PMatrix.cxx.

PMatrix PMatrix::read

(

vcl_istream &

s

)

[static, inherited]

Load from vcl_istream.

Definition at line 266 of file PMatrix.cxx.

bool PMatrix::read_ascii

(

vcl_istream &

f

)

[inherited]

Load from file.

 P.read_ascii("file.P");

Definition at line 226 of file PMatrix.cxx.

void PMatrix::set	(	vnl_double_3x3 const &	A,
		vnl_double_3 const &	a
	)		[inherited]

Set from 3x3 matrix and 3x1 column vector of P = [A a].

Definition at line 542 of file PMatrix.cxx.

void PMatrix::set

(

const double *

p_matrix

)

[inherited]

Set the 3x4 projective matrix with the matrix in the array, p_matrix.

Definition at line 518 of file PMatrix.cxx.

void PMatrix::set

(

const double

p_matrix[3][4]

)

[inherited]

Set the 3x4 projective matrix with the matrix in the array, p_matrix.

Definition at line 493 of file PMatrix.cxx.

void PMatrix::set

(

const vnl_matrix< double > &

p_matrix

)

[inherited]

Set the 3x4 projective matrix with the matrix in the array, p_matrix.

Definition at line 504 of file PMatrix.cxx.

void PMatrix::set

(

vnl_double_3x4 const &

p_matrix

)

[inherited]

Set the fundamental matrix using the vnl_matrix<double> p_matrix.

Definition at line 531 of file PMatrix.cxx.

void PMatrix::set_rows	(	const vnl_vector< double > &	,
		const vnl_vector< double > &	,
		const vnl_vector< double > &
	)		[inherited]

vnl_svd< double > * PMatrix::svd

(

)

const [inherited]

Compute the svd of this P and cache it, so that future operations that require it need not recompute it.

Definition at line 278 of file PMatrix.cxx.

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Member Data Documentation

vnl_double_3x4 PMatrix::p_matrix_ [protected, inherited]

Definition at line 147 of file PMatrix.h.

vnl_svd<double>* PMatrix::svd_ [mutable, protected, inherited]

Definition at line 148 of file PMatrix.h.

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The documentation for this class was generated from the following file:

• contrib/oxl/mvl/PMatrixAffine.h