vil_normalised_correlation_2d.h File Reference

2D normalised correlation More...

#include <cmath>
#include <cstddef>
#include <vil/vil_image_view.h>
#include <cassert>

Go to the source code of this file.

Functions
template<class srcT , class kernelT , class accumT >
accumT	vil_norm_corr_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_normalised_correlation_2d (const vil_image_view< srcT > &src_im, vil_image_view< destT > &dest_im, const vil_image_view< kernelT > &kernel, accumT ac)
	Normalised cross-correlation of (pre-normalised) kernel with srcT. More...

Detailed Description

2D normalised correlation

Author

Tim Cootes

Definition in file vil_normalised_correlation_2d.h.

Function Documentation

vil_norm_corr_2d_at_pt()

template<class srcT , class kernelT , class accumT >

accumT vil_norm_corr_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.

Assumes that the kernel has been normalised to have zero mean and unit variance

Definition at line 22 of file vil_normalised_correlation_2d.h.

vil_normalised_correlation_2d()

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

void vil_normalised_correlation_2d ( const vil_image_view< srcT > &  src_im, vil_image_view< destT > &  dest_im, const vil_image_view< kernelT > &  kernel, accumT  ac  )

inline

Normalised cross-correlation of (pre-normalised) 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)/sd_under_region

Assumes that the kernel has been normalised to have zero mean and unit variance

Definition at line 71 of file vil_normalised_correlation_2d.h.