PhaseMatrices.h

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//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.7.0
// ----------------------------------------------------------------------------
// pcl/PhaseMatrices.h - Released 2024-06-18T15:48:54Z
// ----------------------------------------------------------------------------
// This file is part of the PixInsight Class Library (PCL).
// PCL is a multiplatform C++ framework for development of PixInsight modules.
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// ----------------------------------------------------------------------------
 
#ifndef __PCL_PhaseMatrices_h
#define __PCL_PhaseMatrices_h
 
 
#include <pcl/Defs.h>
 
#include <pcl/Image.h>
 
namespace pcl
{
 
// ----------------------------------------------------------------------------
 
template <class P1, class P2> inline
void PCL_FUNC PhaseCorrelationMatrix( GenericImage<P1>& R, const GenericImage<P2>& A, const GenericImage<P2>& B )
{
   const typename GenericImage<P2>::sample::component tiny( 1.0e-20 );
 
   size_type N = A.NumberOfPixels();
 
   if ( A.IsEmpty() || B.NumberOfPixels() != N )
      throw Error( "Invalid image geometry in PhaseCorrelationMatrix()" );
 
   if ( R.NumberOfPixels() != N )
      R.AllocateData( A.Width(), B.Width() );
 
   if ( R.Status().IsInitializationEnabled() )
      R.Status().Initialize( "Phase correlation matrix", N );
 
   const typename GenericImage<P2>::sample* a  = *A;
   const typename GenericImage<P2>::sample* b  = *B;
         typename GenericImage<P1>::sample* r  = *R;
         typename GenericImage<P1>::sample* rN = r + N;
 
   for ( ; r < rN; ++r, ++a, ++b, ++R.Status() )
   {
      typename GenericImage<P2>::sample num = *a * ~*b;
      *r = P1::ToSample( num/Max( tiny, Abs( num ) ) );
   }
}
 
template <class P1, class P2> inline
void PCL_FUNC CrossPowerSpectrumMatrix( GenericImage<P1>& R, const GenericImage<P2>& A, const GenericImage<P2>& B )
{
   const typename GenericImage<P2>::sample::component tiny( 1.0e-20 );
 
   size_type N = A.NumberOfPixels();
 
   if ( A.IsEmpty() || B.NumberOfPixels() != N )
      throw Error( "Invalid image geometry in CrossPowerSpectrumMatrix()" );
 
   if ( R.NumberOfPixels() != N )
      R.AllocateData( A.Width(), B.Width() );
 
   if ( R.Status().IsInitializationEnabled() )
      R.Status().Initialize( "Cross power spectrum matrix", N );
 
   const typename GenericImage<P2>::sample* a  = *A;
   const typename GenericImage<P2>::sample* b  = *B;
         typename GenericImage<P1>::sample* r  = *R;
         typename GenericImage<P1>::sample* rN = r + N;
 
   for ( ; r < rN; ++r, ++a, ++b, ++R.Status() )
      *r = P1::ToSample( (*b * ~*a)/Max( tiny, Abs( *a ) * Abs( *b ) ) );
}
 
// ----------------------------------------------------------------------------
 
} // pcl
 
#endif   // __PCL_PhaseMatrices_h
 
// ----------------------------------------------------------------------------
// EOF pcl/PhaseMatrices.h - Released 2024-06-18T15:48:54Z