vil1_memory_image_window Class Reference

#include <vil1_memory_image_window.h>

Detailed Description

Operations on a small region of an image.

vil1_memory_image_window centres a mask around a pixel in an vil1_memory_image_of, and implements a few comparison operators: SSD, NSSD, NCC.

Definition at line 19 of file vil1_memory_image_window.h.


Public Member Functions
	vil1_memory_image_window (const vil1_memory_image_of< vxl_byte > &image, int centre_x, int centre_y, int mask_size)
int	sum_abs_diff (const vil1_memory_image_of< vxl_byte > &image2, int centre2_x, int centre2_y, int early_exit_level=vil1_memory_image_window_maxint)
	Return early if difference becomes greater than early_exit_level.
int	sum_sqr_diff (const vil1_memory_image_of< vxl_byte > &image2, int centre2_x, int centre2_y, int early_exit_level=vil1_memory_image_window_maxint)
	Return early if difference becomes greater than early_exit_level.
int	normalised_sum_abs_diff (const vil1_memory_image_of< vxl_byte > &image2, int centre2_x, int centre2_y, double normalise_ratio, int early_exit_level=vil1_memory_image_window_maxint)
double	normalised_cross_correlation (const vil1_memory_image_of< vxl_byte > &image2, int centre2_x, int centre2_y)
float	mean_intensity ()
Protected Member Functions
void	init (int centre_x, int centre_y, int mask_size)
Protected Attributes
const vil1_memory_image_of< vxl_byte > &	image1_
int	mask_size_
int	mask1_col_index_
int	mask1_row_index_
int	centre1_x_
int	centre1_y_
Private Member Functions
	vil1_memory_image_window (const vil1_memory_image_window &that)
vil1_memory_image_window &	operator= (const vil1_memory_image_window &that)

Constructor & Destructor Documentation

vil1_memory_image_window::vil1_memory_image_window	(	const vil1_memory_image_of< vxl_byte > &	image,
		int	centre_x,
		int	centre_y,
		int	mask_size
	)

Definition at line 13 of file vil1_memory_image_window.cxx.

vil1_memory_image_window::vil1_memory_image_window ( const vil1_memory_image_window & that ) [private]

Member Function Documentation

int vil1_memory_image_window::sum_abs_diff	(	const vil1_memory_image_of< vxl_byte > &	image2,
		int	centre2_x,
		int	centre2_y,
		int	early_exit_level = `vil1_memory_image_window_maxint`
	)

Return early if difference becomes greater than early_exit_level.

This is a useful check to have anyway as the default arg of MAXINT avoids accumulator overflow which can easily happen on certain medical and range images.

Definition at line 45 of file vil1_memory_image_window.cxx.

int vil1_memory_image_window::sum_sqr_diff	(	const vil1_memory_image_of< vxl_byte > &	image2,
		int	centre2_x,
		int	centre2_y,
		int	early_exit_level = `vil1_memory_image_window_maxint`
	)

Return early if difference becomes greater than early_exit_level.

This is a useful check to have anyway as the default arg of MAXINT avoids accumulator overflow which can easily happen on certain medical and range images.

Definition at line 87 of file vil1_memory_image_window.cxx.

int vil1_memory_image_window::normalised_sum_abs_diff	(	const vil1_memory_image_of< vxl_byte > &	image2,
		int	centre2_x,
		int	centre2_y,
		double	normalise_ratio,
		int	early_exit_level = `vil1_memory_image_window_maxint`
	)