core/vil/algo/vil_correlate_2d.h File Reference

2D Convolution More...

#include <vcl_compiler.h>
#include <vcl_cassert.h>
#include <vil/vil_image_view.h>

Go to the source code of this file.

Functions
template<class srcT , class kernelT , class accumT >
accumT	vil_correlate_2d_at_pt (const srcT *src_im, vcl_ptrdiff_t s_istep, vcl_ptrdiff_t s_jstep, vcl_ptrdiff_t s_pstep, const vil_image_view< kernelT > &kernel, accumT)
	Evaluate dot product between kernel and src_im.
template<class srcT , class destT , class kernelT , class accumT >
void	vil_correlate_2d (const vil_image_view< srcT > &src_im, vil_image_view< destT > &dest_im, const vil_image_view< kernelT > &kernel, accumT ac)
	Correlate kernel with srcT.

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Detailed Description

2D Convolution

Author:

Tim Cootes

Definition in file vil_correlate_2d.h.

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Function Documentation

template<class srcT , class destT , class kernelT , class accumT >

void vil_correlate_2d	(	const vil_image_view< srcT > &	src_im,
		vil_image_view< destT > &	dest_im,
		const vil_image_view< kernelT > &	kernel,
		accumT	ac
	)		[inline]

Correlate kernel with srcT.

dest is resized to (1+src_im.ni()-kernel.ni())x(1+src_im.nj()-kernel.nj()) (a one plane image). On exit dest(x,y) = sum_ij src_im(x+i,y+j)*kernel(i,j)

Definition at line 54 of file vil_correlate_2d.h.

template<class srcT , class kernelT , class accumT >

accumT vil_correlate_2d_at_pt	(	const srcT *	src_im,
		vcl_ptrdiff_t	s_istep,
		vcl_ptrdiff_t	s_jstep,
		vcl_ptrdiff_t	s_pstep,
		const vil_image_view< kernelT > &	kernel,
		accumT
	)		[inline]

Evaluate dot product between kernel and src_im.

Returns sum_ijp src_im[i*istep+j*jstep+p*pstep]*kernel(i,j,p)

Definition at line 17 of file vil_correlate_2d.h.