core/vil/algo/vil_gauss_reduce.cxx File Reference

Functions to smooth and sub-sample an image in one direction. More...

#include "vil_gauss_reduce.h"
#include <vcl_cmath.h>
#include <vcl_cassert.h>
#include <vxl_config.h>
#include <vnl/vnl_erf.h>
#include <vnl/vnl_math.h>

Go to the source code of this file.

Functions
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_1plane (const vxl_byte *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, vxl_byte *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_1plane (const float *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, float *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_1plane (const double *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, double *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_1plane (const int *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, int *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_1plane (const vxl_int_16 *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, vxl_int_16 *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_2_3_1plane (const float *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, float *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x, result is 2/3rd size.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_2_3_1plane (const double *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, double *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x, result is 2/3rd size.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_2_3_1plane (const vxl_byte *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, vxl_byte *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x, result is 2/3rd size.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_2_3_1plane (const int *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, int *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x, result is 2/3rd size.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_2_3_1plane (const vxl_int_16 *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, vxl_int_16 *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x, result is 2/3rd size.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_121_1plane (const vxl_byte *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, vxl_byte *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_121_1plane (const float *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, float *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_121_1plane (const double *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, double *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_121_1plane (const int *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, int *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.
VCL_DEFINE_SPECIALIZATION void	vil_gauss_reduce_121_1plane (const vxl_int_16 *src_im, unsigned src_ni, unsigned src_nj, vcl_ptrdiff_t s_x_step, vcl_ptrdiff_t s_y_step, vxl_int_16 *dest_im, vcl_ptrdiff_t d_x_step, vcl_ptrdiff_t d_y_step)
	Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.

---

Detailed Description

Functions to smooth and sub-sample an image in one direction.

Author:

Tim Cootes

Definition in file vil_gauss_reduce.cxx.

---

Function Documentation

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_121_1plane	(	const vxl_byte *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		vxl_byte *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.

Smooths with a 3x3 filter and subsamples

Definition at line 443 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_121_1plane	(	const float *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		float *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.

Smooths with a 3x3 filter and subsamples

Definition at line 515 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_121_1plane	(	const double *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		double *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.

Smooths with a 3x3 filter and subsamples

Definition at line 587 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_121_1plane	(	const int *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		int *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.

Smooths with a 3x3 filter and subsamples

Definition at line 659 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_121_1plane	(	const vxl_int_16 *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		vxl_int_16 *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im using 121 filter in x and y.

Smooths with a 3x3 filter and subsamples

Definition at line 731 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_1plane	(	const vxl_byte *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		vxl_byte *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im.

Applies 1-5-8-5-1 filter in x, then samples every other pixel. Fills [0,(ni+1)/2-1][0,nj-1] elements of dest

Definition at line 19 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_1plane	(	const float *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		float *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im.

Applies 1-5-8-5-1 filter in x, then samples every other pixel. Fills [0,(ni+1)/2-1][0,nj-1] elements of dest

Definition at line 64 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_1plane	(	const double *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		double *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im.

Applies 1-5-8-5-1 filter in x, then samples every other pixel. Fills [0,(ni+1)/2-1][0,nj-1] elements of dest

Definition at line 105 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_1plane	(	const int *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		int *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im.

Applies 1-5-8-5-1 filter in x, then samples every other pixel. Fills [0,(ni+1)/2-1][0,nj-1] elements of dest

Definition at line 145 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_1plane	(	const vxl_int_16 *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		vxl_int_16 *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x to produce dest_im.

Applies 1-5-8-5-1 filter in x, then samples every other pixel. Fills [0,(ni+1)/2-1][0,nj-1] elements of dest

Definition at line 187 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_2_3_1plane	(	const float *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		float *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x, result is 2/3rd size.

Applies alternate 1-3-1, 1-1 filter in x, then samples every other pixel. Fills [0,(2*ni+1)/3-1][0,nj-1] elements of dest

Note, 131 filter only an approximation

Definition at line 234 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_2_3_1plane	(	const double *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		double *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x, result is 2/3rd size.

Applies alternate 1-3-1, 1-1 filter in x, then samples every other pixel. Fills [0,(2*ni+1)/3-1][0,nj-1] elements of dest

Note, 131 filter only an approximation

Definition at line 275 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_2_3_1plane	(	const vxl_byte *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		vxl_byte *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x, result is 2/3rd size.

Applies alternate 1-3-1, 1-1 filter in x, then samples every other pixel. Fills [0,(2*ni+1)/3-1][0,nj-1] elements of dest

Note, 131 filter only an approximation

Definition at line 316 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_2_3_1plane	(	const int *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		int *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x, result is 2/3rd size.

Applies alternate 1-3-1, 1-1 filter in x, then samples every other pixel. Fills [0,(2*ni+1)/3-1][0,nj-1] elements of dest

Note, 131 filter only an approximation

Definition at line 360 of file vil_gauss_reduce.cxx.

VCL_DEFINE_SPECIALIZATION void vil_gauss_reduce_2_3_1plane	(	const vxl_int_16 *	src_im,
		unsigned	src_ni,
		unsigned	src_nj,
		vcl_ptrdiff_t	s_x_step,
		vcl_ptrdiff_t	s_y_step,
		vxl_int_16 *	dest_im,
		vcl_ptrdiff_t	d_x_step,
		vcl_ptrdiff_t	d_y_step
	)

Smooth and subsample single plane src_im in x, result is 2/3rd size.

Applies alternate 1-3-1, 1-1 filter in x, then samples every other pixel. Fills [0,(2*ni+1)/3-1][0,nj-1] elements of dest

Note, 131 filter only an approximation

Definition at line 403 of file vil_gauss_reduce.cxx.