contrib/mul/ipts/ipts_entropy_pyramid.h File Reference

Compute local entropy at each level of a scale space pyramid. More...

#include <vimt/vimt_image_2d_of.h>
#include <vimt/vimt_image_pyramid.h>

Go to the source code of this file.

Functions
void	ipts_entropy_pyramid (const vimt_image_2d_of< vxl_byte > &image, vimt_image_pyramid &entropy_pyramid, vimt_image_pyramid &smooth_pyramid, double scale_step, unsigned half_width)
	Compute local entropy at each level of a scale space pyramid.
void	ipts_entropy_pyramid (const vimt_image_pyramid &smooth_pyramid, vimt_image_pyramid &entropy_pyramid, unsigned half_width, int min_v, int max_v)
	Compute entropy at each level of a scale space pyramid.

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Detailed Description

Compute local entropy at each level of a scale space pyramid.

Author:

Tim Cootes

Definition in file ipts_entropy_pyramid.h.

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Function Documentation

void ipts_entropy_pyramid	(	const vimt_image_2d_of< vxl_byte > &	image,
		vimt_image_pyramid &	entropy_pyramid,
		vimt_image_pyramid &	smooth_pyramid,
		double	scale_step,
		unsigned	half_width
	)

Compute local entropy at each level of a scale space pyramid.

Build smooth gaussian pyramid from the image. smooth_pyramid will be of type vxl_byte. entropy_pyramid is set to be of type float. For each pixel in each image, compute entropy in region (2h+1)x(2h+1) centred on the pixel. Use ipts_scale_space_peaks() to get the position and scale of likely corners

Definition at line 19 of file ipts_entropy_pyramid.cxx.

void ipts_entropy_pyramid	(	const vimt_image_pyramid &	smooth_pyramid,
		vimt_image_pyramid &	entropy_pyramid,
		unsigned	half_width,
		int	min_v,
		int	max_v
	)

Compute entropy at each level of a scale space pyramid.

smooth_pyramid must be of type vxl_byte. entropy_pyramid is set to be of type float. For each pixel in each image, compute entropy in region (2h+1)x(2h+1) centred on the pixel. Only values in range [min_v,max_v] are included in the calculation of entropy. Use ipts_scale_space_peaks() to get the position and scale of likely corners

Compute entropy at each level of a scale space pyramid.

smooth_pyramid must be of type vxl_byte. entropy_pyramid is set to be of type float. For each pixel in each image, compute entropy in region (2h+1)x(2h+1) centred on the pixel. Use ipts_scale_space_peaks() to get the position and scale of likely corners

Definition at line 36 of file ipts_entropy_pyramid.cxx.