vil_correlate_2d.h File Reference

2D Convolution More...

#include <cassert>
#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, std::ptrdiff_t s_istep, std::ptrdiff_t s_jstep, std::ptrdiff_t s_pstep, const vil_image_view< kernelT > &kernel, accumT)
	Evaluate dot product between kernel and src_im. More...
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. More...

Detailed Description

2D Convolution

Author

Tim Cootes

Definition in file vil_correlate_2d.h.

Function Documentation

vil_correlate_2d()

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 56 of file vil_correlate_2d.h.

vil_correlate_2d_at_pt()

template<class srcT , class kernelT , class accumT >

accumT vil_correlate_2d_at_pt ( const srcT *  src_im, std::ptrdiff_t  s_istep, std::ptrdiff_t  s_jstep, std::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 19 of file vil_correlate_2d.h.