Hough-Transform line matcher. More...

#include <>>

Inheritance diagram for firevision::HtLinesModel:

Public Member Functions
	HtLinesModel (unsigned int nr_candidates=40, float angle_from=0, float angle_range=2 *M_PI, int r_scale=1, float min_votes_ratio=0.2f, int min_votes=-1)
	Creates a new HtLinesModel instance.
virtual	~HtLinesModel (void)
	Destructor.
std::string	getName (void) const
	Get name of shape model.
int	parseImage (unsigned char buffer, ROI roi)
	Parse image for given ROI.
int	getShapeCount (void) const
	Get number of shapes.
LineShape *	getShape (int id) const
	Get specific shape.
LineShape *	getMostLikelyShape (void) const
	Get best candidate.
std::vector< LineShape > *	getShapes ()
	Get all lines found.
Public Member Functions inherited from firevision::ShapeModel
virtual	~ShapeModel ()
	Virtual empty destructor.

Detailed Description

Hough-Transform line matcher.

Definition at line 43 of file ht_lines.h.

Constructor & Destructor Documentation

firevision::HtLinesModel::HtLinesModel	(	unsigned int	nr_candidates = `40`,
		float	angle_from = `0`,
		float	angle_range = `2 * M_PI`,
		int	r_scale = `1`,
		float	min_votes_ratio = `0.2f`,
		int	min_votes = `-1`
	)

Creates a new HtLinesModel instance.

Constructor.

Parameters:

nr_candidates	the nr of candidates that is considered per pixel (the hole angle range is devided in this many parts/lines
angle_from	The angle to start the candidates from, given in rad, 0 is straight up
angle_range	the angle range the candidates are taken from starting at angle_from, given in rad, can be used for example to only search for horizontal lines
r_scale	This can be done to reduce the size of the hough space and to map more lines to one line
min_votes_ratio	The minimum ratio num_votes_per_line/total_num_votes that we have to have before a point in the hough space is considered to be a line, this may actually be higher if you use min_votes and set it to a higher number (set min_votes to 0 to only use min_votes_ration)
min_votes	the minimum number of votes a point in the hough space has to have before it is considered to be a line. The number may actually be higher if min_votes_ratio is set too high (set min_votes_ration to 0 to use only min_votes)
nr_candidates	number of candidates
angle_from	slope of lines from
angle_range	angle range
r_scale	r scale
min_votes_ratio	min votes ratio
min_votes	minimum number of votes for a candidate to consider

Definition at line 53 of file ht_lines.cpp.

firevision::HtLinesModel::~HtLinesModel ( void )

virtual

Destructor.

Definition at line 69 of file ht_lines.cpp.

Member Function Documentation

LineShape * firevision::HtLinesModel::getMostLikelyShape ( void ) const

virtual

Get best candidate.

Returns:: best candidate shape, do not free.

Implements firevision::ShapeModel.

Definition at line 167 of file ht_lines.cpp.

std::string firevision::HtLinesModel::getName ( void ) const

inlinevirtual

Get name of shape model.

Returns:: name of shape model.

Implements firevision::ShapeModel.

Definition at line 69 of file ht_lines.h.

LineShape * firevision::HtLinesModel::getShape ( int id ) const

virtual

Get specific shape.

Parameters:

id shape ID

Returns:: shape, do NOT free!

Implements firevision::ShapeModel.

Definition at line 156 of file ht_lines.cpp.

int firevision::HtLinesModel::getShapeCount ( void ) const

virtual

Get number of shapes.

Returns:: number of shapes.

Implements firevision::ShapeModel.

Definition at line 150 of file ht_lines.cpp.

vector< LineShape > * firevision::HtLinesModel::getShapes ( )

Get all lines found.

Returns:: vector with all line shapes.

Definition at line 189 of file ht_lines.cpp.

References firevision::LineShape::calcPoints().

int firevision::HtLinesModel::parseImage	(	unsigned char *	buffer,
		ROI *	roi
	)

virtual

Parse image for given ROI.

Parameters:

buffer	image buffer
roi	ROI

Returns:: number of shapes found

Implements firevision::ShapeModel.

Definition at line 75 of file ht_lines.cpp.

References firevision::ROI::get_roi_buffer_start(), firevision::ROI::height, firevision::ROI::line_step, fawkes::rad2deg(), firevision::ROI::width, fawkes::point_t::x, and fawkes::point_t::y.

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

src/libs/fvmodels/shape/ht_lines.h
src/libs/fvmodels/shape/ht_lines.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation