MarkerData contains matrix of Hamming encoded data. More...

#include <Marker.h>

Inheritance diagram for alvar::MarkerData:

Public Types
enum	MarkerContentType { MARKER_CONTENT_TYPE_NUMBER, MARKER_CONTENT_TYPE_STRING, MARKER_CONTENT_TYPE_FILE, MARKER_CONTENT_TYPE_HTTP }
Public Member Functions
bool	DecodeContent (int *orientation)
	DecodeContent should be called after UpdateContent to fill content_type, decode_error and data
unsigned long	GetId () const
	Get ID for recognizing this marker.
	MarkerData (double _edge_length=0, int _res=0, double _margin=0)
	Default constructor.
void	SetContent (MarkerContentType content_type, unsigned long id, const char *str, bool force_strong_hamming=false, bool verbose=false)
	Updates the marker_content by "encoding" the given parameters.
void	SetId (unsigned long _id)
	Set the ID.
virtual bool	UpdateContent (std::vector< Point< CvPoint2D64f > > &_marker_corners_img, IplImage gray, Camera cam, int frame_no=0)
	Updates the marker_content from the image using Homography Compared to the basic implementation in Marker this will also detect the marker resolution automatically when the marker resolution is specified to be 0.
Public Attributes
unsigned char	content_type
union {
unsigned long id
char str [MAX_MARKER_STRING_LEN]
}	data
	MarkerData content can be presented either as number (MARKER_CONTENT_TYPE_NUMBER) or string
Static Public Attributes
static EIGEN_MAKE_ALIGNED_OPERATOR_NEW const int	MAX_MARKER_STRING_LEN = 2048
Protected Member Functions
void	Add6bitStr (BitsetExt bs, char s)
int	DecodeCode (int orientation, BitsetExt bs, int erroneous, int total, unsigned char content_type)
void	DecodeOrientation (int error, int total, int *orientation)
bool	DetectResolution (std::vector< Point< CvPoint2D64f > > &_marker_corners_img, IplImage gray, Camera cam)
void	Read6bitStr (BitsetExt bs, char s, size_t s_max_len)
int	UsableDataBits (int marker_res, int hamming)
virtual void	VisualizeMarkerContent (IplImage image, Camera cam, double datatext_point[2], double content_point[2]) const

Detailed Description

MarkerData contains matrix of Hamming encoded data.

Examples:: SampleMarkerCreator.cpp.

Definition at line 220 of file Marker.h.

Member Enumeration Documentation

enum alvar::MarkerData::MarkerContentType

Enumerator:

MARKER_CONTENT_TYPE_NUMBER
MARKER_CONTENT_TYPE_STRING
MARKER_CONTENT_TYPE_FILE
MARKER_CONTENT_TYPE_HTTP

Definition at line 234 of file Marker.h.

Constructor & Destructor Documentation

alvar::MarkerData::MarkerData	(	double	_edge_length = `0`,
		int	_res = `0`,
		double	_margin = `0`
	)		`[inline]`

Default constructor.

Parameters:

_edge_length	Length of the marker's edge in whatever units you are using (e.g. cm)
_res	The marker content resolution in pixels (this is actually
_margin	The marker margin resolution in pixels (The actual captured marker image has pixel resolution of _margin+_res+_margin)

Definition at line 253 of file Marker.h.

Member Function Documentation

void alvar::MarkerData::Add6bitStr	(	BitsetExt *	bs,
		char *	s
	)		`[protected]`

Definition at line 906 of file Marker.cpp.

int alvar::MarkerData::DecodeCode	(	int	orientation,
		BitsetExt *	bs,
		int *	erroneous,
		int *	total,
		unsigned char *	content_type
	)		`[protected]`

Definition at line 771 of file Marker.cpp.

bool alvar::MarkerData::DecodeContent ( int * orientation ) [virtual]

DecodeContent should be called after UpdateContent to fill content_type, decode_error and data

Reimplemented from alvar::Marker.

Definition at line 878 of file Marker.cpp.

void alvar::MarkerData::DecodeOrientation	(	int *	error,
		int *	total,
		int *	orientation
	)		`[protected]`

Definition at line 632 of file Marker.cpp.

bool alvar::MarkerData::DetectResolution	(	std::vector< Point< CvPoint2D64f > > &	_marker_corners_img,
		IplImage *	gray,
		Camera *	cam
	)		`[protected]`

Definition at line 670 of file Marker.cpp.

unsigned long alvar::MarkerData::GetId ( ) const [inline, virtual]

Get ID for recognizing this marker.

Reimplemented from alvar::Marker.

Definition at line 258 of file Marker.h.

void alvar::MarkerData::Read6bitStr	(	BitsetExt *	bs,
		char *	s,
		size_t	s_max_len
	)		`[protected]`

Definition at line 829 of file Marker.cpp.

void alvar::MarkerData::SetContent	(	MarkerContentType	content_type,
		unsigned long	id,
		const char *	str,
		bool	force_strong_hamming = `false`,
		bool	verbose = `false`
	)

Updates the marker_content by "encoding" the given parameters.

Examples:: SampleMarkerCreator.cpp.

Definition at line 957 of file Marker.cpp.

void alvar::MarkerData::SetId ( unsigned long _id ) [inline, virtual]

Set the ID.

Reimplemented from alvar::Marker.

Definition at line 260 of file Marker.h.

bool alvar::MarkerData::UpdateContent	(	std::vector< Point< CvPoint2D64f > > &	_marker_corners_img,
		IplImage *	gray,
		Camera *	cam,
		int	frame_no = `0`
	)		`[virtual]`

Updates the marker_content from the image using Homography Compared to the basic implementation in Marker this will also detect the marker resolution automatically when the marker resolution is specified to be 0.

Reimplemented from alvar::Marker.

Definition at line 764 of file Marker.cpp.

int alvar::MarkerData::UsableDataBits	(	int	marker_res,
		int	hamming
	)		`[protected]`

Definition at line 945 of file Marker.cpp.

void alvar::MarkerData::VisualizeMarkerContent	(	IplImage *	image,
		Camera *	cam,
		double	datatext_point[2],
		double	content_point[2]
	)		const `[protected, virtual]`