#include <brip_para_cvrg.h>

Inheritance diagram for brip_para_cvrg:

Public Member Functions
	brip_para_cvrg (float sigma=1.0, float low=6, float gauss_tail=.05, int proj_width=7, int proj_height=1, int sup_radius=1, bool verbose=true)
	Constructor s.
	brip_para_cvrg (brip_para_cvrg_params &pdp)
	~brip_para_cvrg ()
	Destructor.
void	do_coverage (vil_image_resource_sptr const &image)
vil_image_view< float >	get_float_detection_image (const float max=255)
	Get the float image of detections. Scale onto [0, max].
vil_image_view< unsigned char >	get_detection_image ()
	Get the unsigned char image of detections.
vil_image_view< unsigned char >	get_dir_image ()
	Get the direction image (unsigned char).
vil_image_view< vil_rgb < unsigned char > >	get_combined_image ()
	Get the combination of coverage and direction as a color image.
bool	SanityCheck ()
	Checks that parameters are within acceptable bounds.
Public Attributes
float	sigma_
	Standard deviation of the smoothing kernel.
float	thresh_
	Low hysteresis threshold.
float	gauss_tail_
	Used in determining the convolution kernel.
int	proj_width_
	1/2 the projection region width
int	proj_height_
	1/2 the projection region height
int	sup_radius_
	The non_maximum suppression kernel width.
bool	verbose_
	output debug messages
Private Member Functions
void	init (vil_image_resource_sptr const &image)
	Image Initialization.
void	init_variables ()
	Variable Initialization.
void	set_kernel ()
void	smooth_image ()
	Convolves the image with the smoothing kernel. Private.
void	avg (int x, int y, vil_image_view< float > const &smooth, vil_image_view< float > &avg)
	Compute the average value in the 7x7 window.
void	grad0 (int x, int y, vil_image_view< float > const &smooth, vil_image_view< float > &grad0)
	Compute a gradient operator at x,y along the x axis.
void	grad45 (int x, int y, vil_image_view< float > const &smooth, vil_image_view< float > &grad45)
	Compute a gradient operator at x,y at 45 degrees.
void	grad90 (int x, int y, vil_image_view< float > const &smooth, vil_image_view< float > &grad90)
	Compute a gradient operator at x,y at 90 degrees.
void	grad135 (int x, int y, vil_image_view< float > const &smooth, vil_image_view< float > &grad135)
	Compute a gradient operator at x,y at 135 degrees.
void	compute_gradients ()
	Convolves with the kernel in the x direction, to compute the local derivative in that direction.
float	project (int x, int y, int dir, vcl_vector< float > &projection)
	Project the gradient magnitude along a given direction.
void	remove_flat_peaks (int n, vcl_vector< float > &array)
	Prune any sequences of more than one maximum value.
void	non_maximum_supress (vcl_vector< float > const &array, vcl_vector< float > &sup_array)
	Find locally maximum peaks in the input array.
float	parallel_coverage (vcl_vector< float > const &sup_array)
	Find the amount of overlapping parallel coverage.
void	compute_parallel_coverage ()
	Find the direction with maximum parallel coverage. Return the normalized coverage value.
void	compute_image (vil_image_view< float > const &data, vil_image_view< unsigned char > &image)
	Compute a 8-bit image from the projected gradients.
Private Attributes
int	proj_n_
int	width_
int	k_size_
vcl_vector< float >	kernel_
int	xstart_
int	ystart_
int	xsize_
int	ysize_
vil_image_view< float >	smooth_
vil_image_view< float >	avg_
vil_image_view< float >	grad0_
vil_image_view< float >	grad45_
vil_image_view< float >	grad90_
vil_image_view< float >	grad135_
vil_image_view< float >	det_
vil_image_view< float >	dir_
vil_image_view< unsigned char >	det_image_
vil_image_view< unsigned char >	dir_image_
vil_image_view< float >	image_
vcl_vector< float >	sup_proj_
vcl_vector< float >	proj_0_
vcl_vector< float >	proj_45_
vcl_vector< float >	proj_90_
vcl_vector< float >	proj_135_

Detailed Description

Definition at line 39 of file brip_para_cvrg.h.

Constructor & Destructor Documentation

brip_para_cvrg::brip_para_cvrg	(	float	sigma = `1.0`,
		float	low = `6`,
		float	gauss_tail = `.05`,
		int	proj_width = `7`,
		int	proj_height = `1`,
		int	sup_radius = `1`,
		bool	verbose = `true`
	)

Constructor s.

Definition at line 56 of file brip_para_cvrg.cxx.

brip_para_cvrg::brip_para_cvrg ( brip_para_cvrg_params & pdp )

Definition at line 66 of file brip_para_cvrg.cxx.

brip_para_cvrg::~brip_para_cvrg ( )

Destructor.

Definition at line 74 of file brip_para_cvrg.cxx.

Member Function Documentation

void brip_para_cvrg::avg	(	int	x,
		int	y,
		vil_image_view< float > const &	smooth,
		vil_image_view< float > &	avg
	)		`[private]`

Compute the average value in the 7x7 window.

Definition at line 91 of file brip_para_cvrg.cxx.

void brip_para_cvrg::compute_gradients ( ) [private]

Convolves with the kernel in the x direction, to compute the local derivative in that direction.

Private.

Definition at line 162 of file brip_para_cvrg.cxx.

void brip_para_cvrg::compute_image	(	vil_image_view< float > const &	data,
		vil_image_view< unsigned char > &	image
	)		`[private]`

Compute a 8-bit image from the projected gradients.

Definition at line 426 of file brip_para_cvrg.cxx.

void brip_para_cvrg::compute_parallel_coverage ( ) [private]

Find the direction with maximum parallel coverage. Return the normalized coverage value.

Definition at line 364 of file brip_para_cvrg.cxx.

void brip_para_cvrg::do_coverage ( vil_image_resource_sptr const & image )

Definition at line 450 of file brip_para_cvrg.cxx.

vil_image_view< vil_rgb< unsigned char > > brip_para_cvrg::get_combined_image ( )

Get the combination of coverage and direction as a color image.

Definition at line 508 of file brip_para_cvrg.cxx.

vil_image_view< unsigned char > brip_para_cvrg::get_detection_image ( )

Get the unsigned char image of detections.

Definition at line 484 of file brip_para_cvrg.cxx.

vil_image_view< unsigned char > brip_para_cvrg::get_dir_image ( )

Get the direction image (unsigned char).

Definition at line 494 of file brip_para_cvrg.cxx.

vil_image_view< float > brip_para_cvrg::get_float_detection_image ( const float max = 255 )

Get the float image of detections. Scale onto [0, max].

Definition at line 462 of file brip_para_cvrg.cxx.

void brip_para_cvrg::grad0	(	int	x,
		int	y,
		vil_image_view< float > const &	smooth,
		vil_image_view< float > &	grad0
	)		`[private]`

Compute a gradient operator at x,y along the x axis.

Definition at line 106 of file brip_para_cvrg.cxx.

void brip_para_cvrg::grad135	(	int	x,
		int	y,
		vil_image_view< float > const &	smooth,
		vil_image_view< float > &	grad135
	)		`[private]`

Compute a gradient operator at x,y at 135 degrees.

Definition at line 147 of file brip_para_cvrg.cxx.

void brip_para_cvrg::grad45	(	int	x,
		int	y,
		vil_image_view< float > const &	smooth,
		vil_image_view< float > &	grad45
	)		`[private]`

Compute a gradient operator at x,y at 45 degrees.

Definition at line 120 of file brip_para_cvrg.cxx.

void brip_para_cvrg::grad90	(	int	x,
		int	y,
		vil_image_view< float > const &	smooth,
		vil_image_view< float > &	grad90
	)		`[private]`

Compute a gradient operator at x,y at 90 degrees.

Definition at line 134 of file brip_para_cvrg.cxx.

void brip_para_cvrg::init ( vil_image_resource_sptr const & image ) [private]

Image Initialization.

Definition at line 27 of file brip_para_cvrg.cxx.

void brip_para_cvrg::init_variables ( ) [private]

Variable Initialization.

Definition at line 13 of file brip_para_cvrg.cxx.

void brip_para_cvrg::non_maximum_supress	(	vcl_vector< float > const &	array,
		vcl_vector< float > &	sup_array
	)		`[private]`

Find locally maximum peaks in the input array.

Definition at line 311 of file brip_para_cvrg.cxx.

float brip_para_cvrg::parallel_coverage ( vcl_vector< float > const & sup_array ) [private]

Find the amount of overlapping parallel coverage.

Definition at line 344 of file brip_para_cvrg.cxx.

float brip_para_cvrg::project	(	int	x,
		int	y,
		int	dir,
		vcl_vector< float > &	projection
	)		`[private]`

Project the gradient magnitude along a given direction.

The result is a 1-d projection plot.

                       .
                      *  .
                     ^  *  .
                   /   ^  *  .
                    \    ^  *  .
                           ^  *  \ .
     2*proj_width_+1   x     ^  x-----2*proj_height_+1
                          \ / \ .

Definition at line 198 of file brip_para_cvrg.cxx.