DIPlib Documentation - ©1995-2008 Quantitative Imaging Group, Delft University of Technology.

CrossCorrelationFT

Normalized cross-correlation using the Fourier Transform

SYNOPSIS

#include "dip_findshift.h"

dip_Error dip_CrossCorrelationFT ( in1, in2, out, in1rep, in2rep, outrep )

DATA TYPES

binary, integer, float, complex

FUNCTION

This function calculates the cross-correlation between two images of equal size. The returned image is the cross-correlation normalized in such a way that only the phase information is of importance. This results as a very sharp peak in the spatial domain. This function performs out = (Conj(in1)*in2)/((Abs(in1))^2) in the Fourier domain. It is used by FindShift. The inrep, psfrep and outrep specify whether the images are spatial images (DIP_IMAGE_REPRESENTATION_SPATIAL) or their Fourier transform. (DIP_IMAGE_REPRESENTATION_SPECTRAL).

ARGUMENTS

Data typeNameDescription
dip_Imagein1Input image
dip_Imagein2Input image
dip_ImageoutOutput image
dipf_ImageRepresentationin1repInput 1 spatial or spectral
dipf_ImageRepresentationin2repInput 2 spatial or spectral
dipf_ImageRepresentationoutrepOutput spatial or spectral

SEE ALSO

FindShift

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