firevision::RhtLinesModel Class Reference

Randomized Hough-Transform line model. More...

#include <>>

Inheritance diagram for firevision::RhtLinesModel:

Public Member Functions
	RhtLinesModel (float max_time=0.005, int max_iter=1000, 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 RhtLinesModel instance. More...
virtual	~RhtLinesModel (void)
	Destructor. More...
std::string	getName (void) const
	Get name of shape model. More...
int	parseImage (unsigned char *buffer, ROI *roi)
	Parse image for given ROI. More...
int	getShapeCount (void) const
	Get number of shapes. More...
LineShape *	getShape (int id) const
	Get specific shape. More...
LineShape *	getMostLikelyShape (void) const
	Get best candidate. More...
std::vector< LineShape > *	getShapes ()
	Get shapes. More...
Public Member Functions inherited from firevision::ShapeModel
virtual	~ShapeModel ()
	Virtual empty destructor. More...

Detailed Description

Randomized Hough-Transform line model.

Definition at line 43 of file rht_lines.h.

Constructor & Destructor Documentation

firevision::RhtLinesModel::RhtLinesModel	(	float	max_time = 0.005,
		int	max_iter = 1000,
		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 RhtLinesModel instance.

Constructor.

Parameters

max_time	the maximum runtime of a single parseImage call in seconds, if you set max_iter to a small number this time may not be used completely
max_iter	the maximum number of iterations one parseImage will do, if you set max_time to a short time this number may not be reached
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)

Definition at line 45 of file rht_lines.cpp.

firevision::RhtLinesModel::~RhtLinesModel ( void  )

virtual

Destructor.

Definition at line 64 of file rht_lines.cpp.

Member Function Documentation

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

virtual

Get best candidate.

Returns

best candidate shape, do not free.

Implements firevision::ShapeModel.

Definition at line 188 of file rht_lines.cpp.

Referenced by getName().

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

inlinevirtual

Get name of shape model.

Returns

name of shape model.

Implements firevision::ShapeModel.

Definition at line 74 of file rht_lines.h.

References getMostLikelyShape(), getShape(), getShapeCount(), getShapes(), and parseImage().

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

virtual

Get specific shape.

Parameters

id

shape ID

Returns

shape, do NOT free!

Implements firevision::ShapeModel.

Definition at line 177 of file rht_lines.cpp.

Referenced by getName().

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

virtual

Get number of shapes.

Returns

number of shapes.

Implements firevision::ShapeModel.

Definition at line 171 of file rht_lines.cpp.

Referenced by getName().

vector< LineShape > * firevision::RhtLinesModel::getShapes

(

)

Get shapes.

Returns

vector of shapes

Definition at line 210 of file rht_lines.cpp.

References firevision::LineShape::calcPoints().

Referenced by getName().

int firevision::RhtLinesModel::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 73 of file rht_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.

Referenced by getName().

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

• src/libs/fvmodels/shape/rht_lines.h
• src/libs/fvmodels/shape/rht_lines.cpp