HoughLine Class Reference

#include <houghline.h>

Inheritance diagram for HoughLine:

Public Types
enum	IntersectResult { PARALLEL , COINCIDENT , NOT_INTERESECTING , INTERESECTING }
Public Types inherited from QLineF
enum	IntersectionType

Public Member Functions
	HoughLine (double theta, double r, int width, int height, int score)
bool	DistancePointLine (const QPointF &point, QPointF &intersection, double &distance)
double	getR () const
int	getScore () const
double	getTheta () const
IntersectResult	Intersect (const HoughLine &other_line, QPointF &intersection)
void	Offset (const int offsetX, const int offsetY)
bool	operator< (const HoughLine &other) const
HoughLine &	operator= (const HoughLine &other)
void	printHoughLine ()
QPointF	RotatePoint (int x1, double r, double theta, int width, int height)
void	setTheta (const double theta)
Public Member Functions inherited from QLineF
	QLineF (const QLine &line)
	QLineF (const QPointF &p1, const QPointF &p2)
	QLineF (qreal x1, qreal y1, qreal x2, qreal y2)
qreal	angle () const const
qreal	angleTo (const QLineF &line) const const
QPointF	center () const const
qreal	dx () const const
qreal	dy () const const
IntersectionType	intersects (const QLineF &line, QPointF *intersectionPoint) const const
bool	isNull () const const
qreal	length () const const
QLineF	normalVector () const const
bool	operator!= (const QLineF &line) const const
QDataStream &	operator<< (QDataStream &stream, const QLineF &line)
bool	operator== (const QLineF &line) const const
QDataStream &	operator>> (QDataStream &stream, QLineF &line)
QPointF	p1 () const const
QPointF	p2 () const const
QPointF	pointAt (qreal t) const const
void	setAngle (qreal angle)
void	setLength (qreal length)
void	setLine (qreal x1, qreal y1, qreal x2, qreal y2)
void	setP1 (const QPointF &p1)
void	setP2 (const QPointF &p2)
void	setPoints (const QPointF &p1, const QPointF &p2)
QLine	toLine () const const
void	translate (const QPointF &offset)
void	translate (qreal dx, qreal dy)
QLineF	translated (const QPointF &offset) const const
QLineF	translated (qreal dx, qreal dy) const const
QLineF	unitVector () const const
qreal	x1 () const const
qreal	x2 () const const
qreal	y1 () const const
qreal	y2 () const const

Static Public Member Functions
static bool	compareByScore (const HoughLine *line1, const HoughLine *line2)
static bool	compareByTheta (const HoughLine *line1, const HoughLine *line2)
static void	getSortedTopThreeLines (QVector< HoughLine * > &houghLines, QVector< HoughLine * > &top3Lines)
Static Public Member Functions inherited from QLineF
QLineF	fromPolar (qreal length, qreal angle)

Additional Inherited Members
Public Attributes inherited from QLineF
	BoundedIntersection
typedef	IntersectType
	NoIntersection
	UnboundedIntersection

Detailed Description

Line representation for HoughTransform Based on the java implementation found on http://vase.essex.ac.uk/software/HoughTransform.

Author

Patrick Molenaar

Version

1.0

Definition at line 22 of file houghline.h.

Member Enumeration Documentation

IntersectResult

enum HoughLine::IntersectResult

Definition at line 25 of file houghline.h.

Constructor & Destructor Documentation

HoughLine()

HoughLine::HoughLine	(	double	theta,
		double	r,
		int	width,
		int	height,
		int	score )

Initialises the hough line.

Definition at line 16 of file houghline.cpp.

Member Function Documentation

compareByScore()

bool HoughLine::compareByScore ( const HoughLine * line1, const HoughLine * line2 )

static

Definition at line 72 of file houghline.cpp.

compareByTheta()

bool HoughLine::compareByTheta ( const HoughLine * line1, const HoughLine * line2 )

static

Definition at line 77 of file houghline.cpp.

DistancePointLine()

bool HoughLine::DistancePointLine	(	const QPointF &	point,
		QPointF &	intersection,
		double &	distance )

Definition at line 134 of file houghline.cpp.

getR()

double HoughLine::getR

(

)

const

Definition at line 57 of file houghline.cpp.

getScore()

int HoughLine::getScore

(

)

const

Definition at line 52 of file houghline.cpp.

getSortedTopThreeLines()

void HoughLine::getSortedTopThreeLines ( QVector< HoughLine * > & houghLines, QVector< HoughLine * > & top3Lines )

static

Definition at line 160 of file houghline.cpp.

getTheta()

double HoughLine::getTheta

(

)

const

Definition at line 62 of file houghline.cpp.

Intersect()

HoughLine::IntersectResult HoughLine::Intersect	(	const HoughLine &	other_line,
		QPointF &	intersection )

Sources for intersection and distance calculations came from http://paulbourke.net/geometry/pointlineplane/ Also check https://doc.qt.io/archives/qt-4.8/qlinef.html for more line methods.

Definition at line 94 of file houghline.cpp.

Offset()

void HoughLine::Offset	(	const int	offsetX,
		const int	offsetY )

Definition at line 154 of file houghline.cpp.

operator<()

bool HoughLine::operator< ( const HoughLine & other ) const

inline

Definition at line 52 of file houghline.h.

operator=()

HoughLine & HoughLine::operator= ( const HoughLine & other )

inline

Definition at line 42 of file houghline.h.

printHoughLine()

void HoughLine::printHoughLine

(

)

Definition at line 82 of file houghline.cpp.

RotatePoint()

QPointF HoughLine::RotatePoint	(	int	x1,
		double	r,
		double	theta,
		int	width,
		int	height )

Definition at line 27 of file houghline.cpp.

setTheta()

void HoughLine::setTheta

(

const double

theta

)

Definition at line 67 of file houghline.cpp.

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

• houghline.h
• houghline.cpp