#include <brip_gain_offset_solver.h>

Public Member Functions
	brip_gain_offset_solver ()
	brip_gain_offset_solver (vil_image_view< float > const &model_image, vil_image_view< float > const &test_image)
	constructor with images, which are used in entirety.
	brip_gain_offset_solver (vil_image_view< float > const &model_image, vil_image_view< float > const &test_image, vil_image_view< unsigned char > const &model_mask, vil_image_view< unsigned char > const &test_mask)
	constructor with images and masks. pixels with mask(i,j)=true are valid.
	~brip_gain_offset_solver ()
void	set_model_image (vil_image_view< float > const &image)
	set images after default construction.
void	set_test_image (vil_image_view< float > const &image)
void	set_model_mask (vil_image_view< unsigned char > const &mask)
	set masks to define valid pixels in each image. Otherwise entire image is used.
void	set_test_mask (vil_image_view< unsigned char > const &mask)
unsigned	ni () const
	accessors.
unsigned	nj () const
float	gain () const
float	offset () const
bool	solve ()
	operations.
vil_image_view< float >	mapped_test_image ()
	transform the test image by the solved gain and offset.
Protected Member Functions
void	compute_valid_pix ()
	internal methods.
Protected Attributes
unsigned	ni_
	members.
unsigned	nj_
vil_image_view< float >	model_image_
vil_image_view< float >	test_image_
float	gain_
float	offset_
vil_image_view< unsigned char >	model_mask_
vil_image_view< unsigned char >	test_mask_
bool	t_mask_
bool	m_mask_
unsigned	n_valid_pix_

Detailed Description

Definition at line 25 of file brip_gain_offset_solver.h.

Constructor & Destructor Documentation

brip_gain_offset_solver::brip_gain_offset_solver ( ) [inline]

Definition at line 29 of file brip_gain_offset_solver.h.

brip_gain_offset_solver::brip_gain_offset_solver	(	vil_image_view< float > const &	model_image,
		vil_image_view< float > const &	test_image
	)

constructor with images, which are used in entirety.

Definition at line 57 of file brip_gain_offset_solver.cxx.

brip_gain_offset_solver::brip_gain_offset_solver	(	vil_image_view< float > const &	model_image,
		vil_image_view< float > const &	test_image,
		vil_image_view< unsigned char > const &	model_mask,
		vil_image_view< unsigned char > const &	test_mask
	)

constructor with images and masks. pixels with mask(i,j)=true are valid.

Definition at line 66 of file brip_gain_offset_solver.cxx.

brip_gain_offset_solver::~brip_gain_offset_solver ( ) [inline]

Definition at line 42 of file brip_gain_offset_solver.h.

Member Function Documentation

void brip_gain_offset_solver::compute_valid_pix ( ) [protected]

internal methods.

compute the number of valid corresponding pixels in the case of masks.

Definition at line 9 of file brip_gain_offset_solver.cxx.

float brip_gain_offset_solver::gain ( ) const [inline]

Definition at line 54 of file brip_gain_offset_solver.h.

vil_image_view< float > brip_gain_offset_solver::mapped_test_image ( )

transform the test image by the solved gain and offset.

Definition at line 124 of file brip_gain_offset_solver.cxx.

unsigned brip_gain_offset_solver::ni ( ) const [inline]

accessors.

Definition at line 52 of file brip_gain_offset_solver.h.

unsigned brip_gain_offset_solver::nj ( ) const [inline]

Definition at line 53 of file brip_gain_offset_solver.h.

float brip_gain_offset_solver::offset ( ) const [inline]

Definition at line 55 of file brip_gain_offset_solver.h.

void brip_gain_offset_solver::set_model_image ( vil_image_view< float > const & image ) [inline]

set images after default construction.

Definition at line 45 of file brip_gain_offset_solver.h.

void brip_gain_offset_solver::set_model_mask ( vil_image_view< unsigned char > const & mask ) [inline]

set masks to define valid pixels in each image. Otherwise entire image is used.

Definition at line 48 of file brip_gain_offset_solver.h.

void brip_gain_offset_solver::set_test_image ( vil_image_view< float > const & image ) [inline]

Definition at line 46 of file brip_gain_offset_solver.h.

void brip_gain_offset_solver::set_test_mask ( vil_image_view< unsigned char > const & mask ) [inline]

Definition at line 49 of file brip_gain_offset_solver.h.

bool brip_gain_offset_solver::solve ( )

operations.

Im = model_image intensity, It = test_image intensity.

each pixel defines an equation

gain*It(i,j) + off = Im(i,j)

Define the matrix A, and vector b

       [It(0,0)        1]     [Im(0,0)      ]
       [It(1,0)        1]     [Im(1,0)      ]
   A = [     ...        ]  b =[  ...        ]
       [It(ni-1, nj-1) 1]     [Im(ni-1,nj-1)]

Use SVD to solve A [gain] = b [off]

Definition at line 94 of file brip_gain_offset_solver.cxx.