mimas::pgh Class Reference

Pairwise geometric histograms. More...

#include <pgh.h>

Inheritance diagram for mimas::pgh:

[legend]Collaboration diagram for mimas::pgh:

[legend]List of all members.

Public Types
typedef boost::numeric::ublas::vector< double >	Vector
	< ??
Public Member Functions
	pgh (void)
	~pgh (void)
void	initialise (pgh_type newpairs_type, double newdbin_max, double newdbin_size, double newdist_ramp, int newnum_abin, double newangle_sigma)
void	initialise (void)
void	describeLine (const line &ref_line, const line_ptr_list &l)
void	init_pairs_entry (void)
bool	adjust_for_distance_ramp (double *weight, double *min_d, double *max_d, double dbin_min, double dist_ramp)
void	build_normalized_pairwise (const line &ref_line, const line_ptr_list &geom)
void	compare_lines (const line &refline, const line &line)
void	compare_lines_mirror (const line &l1, const line &l2)
void	make_entry_mirror (double min_d, double max_d, double angle, double weight)
void	make_entry_rotate (double min_d, double max_d, double angle, double weight)
void	compare_lines_rotate (const line &l1, const line &l2)
void	make_entry_directed (double min_d, double max_d, double angle, double weight)
void	make_entry_direct (double min_d, double max_d, double angle, double weight)
void	compare_lines_directed (const line &l1, const line &l2)
Vector	dir_vec (const Vector &isct, const Vector &p1, const Vector &p2)
void	get_pdist (double *pdist, double pdmin, double pdmax, double bin_width, double ramp, int *low_bin, int *high_bin)
void	sqr_root_and_normalize (void)
Protected Attributes
pgh_type	pairs_type
	specifies the encoding used to create the histogram
double	dbin_max
double	dbin_min
	distance range which the histogram spans
double	dbin_size
double	dist_ramp
	range of each histogram bin wrt distance, number of angle bins in hist
int	num_abin
double	angle_sigma
double	abin_size
	range of each angle bin, sigma= angle m'ment error estimate
double *	pair_dist
double *	real_pair_dist
	??
double *	pair_angle
double *	real_pair_angle

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Detailed Description

Pairwise geometric histograms.

Pairwise geometric histograms. see the many papers by Evans,Thacker,Ashbrook and Caparrelli This flaky implementation by stuart meikle 22.02.2000, based on original Tina tool source code.

A pairwise geometric histogram is a special kind of hough transform. Much of the code here was taken from Tina, and modified to cope with the new base classes. Its easy enough to use, just do

    pgh my_pgh;
    my_pgh.initialise(); my_pgh.describeLine( ref_line, set_of_lines );

which will create a pgh for that line. You should add extra code to set the parameters used during creation. There probably shouldn't be an erf array allocated for every Pgh ! oops. To fix this make the variable instance a static so that only one is used for all instances of pgh. Also please note that the 'directed' kind of histogram is now formed correctly unlike in Tina. Also i think there should be a warning somewher ein the creation process to say : Hang about mate, you've given me an object which is 500x500 and you want me to use histograms with a max distance axis of 50? Ie the histogram should scale with the model. Because the pgh is an image type, to do a bhattacharyya comparison between two do:

    pgh p1,p2;
    // ... enter values into p1 and p2 ...
    p1.sqr_root_and_normalize(); 
    p2.sqr_root_and_normalize(); 
    result =p1.dotProduct(p2);

Definition at line 58 of file pgh.h.

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Member Typedef Documentation

typedef boost::numeric::ublas::vector< double > mimas::pgh::Vector

< ??

Reimplemented from mimas::hough_transform.

Definition at line 79 of file pgh.h.

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Constructor & Destructor Documentation

mimas::pgh::pgh

(

void

)

mimas::pgh::~pgh

(

void

)

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Member Function Documentation

void mimas::pgh::initialise	(	pgh_type	newpairs_type,
		double	newdbin_max,
		double	newdbin_size,
		double	newdist_ramp,
		int	newnum_abin,
		double	newangle_sigma
	)

void mimas::pgh::initialise

(

void

)

void mimas::pgh::describeLine	(	const line &	ref_line,
		const line_ptr_list &	l
	)

void mimas::pgh::init_pairs_entry

(

void

)

bool mimas::pgh::adjust_for_distance_ramp	(	double *	weight,
		double *	min_d,
		double *	max_d,
		double	dbin_min,
		double	dist_ramp
	)

void mimas::pgh::build_normalized_pairwise	(	const line &	ref_line,
		const line_ptr_list &	geom
	)

void mimas::pgh::compare_lines	(	const line &	refline,
		const line &	line
	)

void mimas::pgh::compare_lines_mirror	(	const line &	l1,
		const line &	l2
	)

void mimas::pgh::make_entry_mirror	(	double	min_d,
		double	max_d,
		double	angle,
		double	weight
	)

void mimas::pgh::make_entry_rotate	(	double	min_d,
		double	max_d,
		double	angle,
		double	weight
	)

void mimas::pgh::compare_lines_rotate	(	const line &	l1,
		const line &	l2
	)

void mimas::pgh::make_entry_directed	(	double	min_d,
		double	max_d,
		double	angle,
		double	weight
	)

void mimas::pgh::make_entry_direct	(	double	min_d,
		double	max_d,
		double	angle,
		double	weight
	)

void mimas::pgh::compare_lines_directed	(	const line &	l1,
		const line &	l2
	)

Vector mimas::pgh::dir_vec	(	const Vector &	isct,
		const Vector &	p1,
		const Vector &	p2
	)

void mimas::pgh::get_pdist	(	double *	pdist,
		double	pdmin,
		double	pdmax,
		double	bin_width,
		double	ramp,
		int *	low_bin,
		int *	high_bin
	)

void mimas::pgh::sqr_root_and_normalize

(

void

)

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Member Data Documentation

pgh_type mimas::pgh::pairs_type [protected]

specifies the encoding used to create the histogram

Definition at line 69 of file pgh.h.

double mimas::pgh::dbin_max [protected]

Definition at line 70 of file pgh.h.

double mimas::pgh::dbin_min [protected]

distance range which the histogram spans

Definition at line 70 of file pgh.h.

double mimas::pgh::dbin_size [protected]

Definition at line 71 of file pgh.h.

double mimas::pgh::dist_ramp [protected]

range of each histogram bin wrt distance, number of angle bins in hist

Definition at line 71 of file pgh.h.

int mimas::pgh::num_abin [protected]

Definition at line 72 of file pgh.h.

double mimas::pgh::angle_sigma [protected]

Definition at line 73 of file pgh.h.

double mimas::pgh::abin_size [protected]

range of each angle bin, sigma= angle m'ment error estimate

Definition at line 73 of file pgh.h.

double* mimas::pgh::pair_dist [protected]

Definition at line 74 of file pgh.h.

double * mimas::pgh::real_pair_dist [protected]

??

Definition at line 74 of file pgh.h.

double* mimas::pgh::pair_angle [protected]

Definition at line 75 of file pgh.h.

double * mimas::pgh::real_pair_angle [protected]

Definition at line 75 of file pgh.h.

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

• pgh.h

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