WorldTransformation.h

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//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.6.11
// ----------------------------------------------------------------------------
// pcl/WorldTransformation.h - Released 2024-05-07T15:27:32Z
// ----------------------------------------------------------------------------
// 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_WorldTransformation_h
#define __PCL_WorldTransformation_h
 
 
#include <pcl/Defs.h>
#include <pcl/Diagnostics.h>
 
#include <pcl/GridInterpolation.h>
#include <pcl/LinearTransformation.h>
#include <pcl/SurfaceSpline.h>
#include <pcl/WCSKeywords.h>
 
/*
 * Based on original work contributed by Andrés del Pozo.
 */
 
namespace pcl
{
 
// ----------------------------------------------------------------------------
 
#define __PCL_WCS_DEFAULT_SPLINE_ORDER                       2
#define __PCL_WCS_DEFAULT_SPLINE_SMOOTHNESS                  0.005F
#define __PCL_WCS_SURFACE_SIMPLIFIER_DEFAULT_ENABLED         true
#define __PCL_WCS_SURFACE_SIMPLIFIER_DEFAULT_REJECT_FRACTION 0.10F
#define __PCL_WCS_MAX_SPLINE_POINTS                          2100
 
// ----------------------------------------------------------------------------
 
class PCL_CLASS WorldTransformation
{
public:
 
   WorldTransformation() = default;
 
   WorldTransformation( const WorldTransformation& ) = default;
 
   virtual ~WorldTransformation()
   {
   }
 
   virtual bool IsEmpty() const
   {
      return false;
   }
 
   virtual WorldTransformation* Clone() const = 0;
 
   virtual DPoint Direct( const DPoint& p ) const = 0;
 
   virtual DPoint Inverse( const DPoint& p ) const = 0;
 
   virtual const LinearTransformation& ApproximateLinearTransform() const = 0;
};
 
// ----------------------------------------------------------------------------
 
class PCL_CLASS LinearWorldTransformation : public WorldTransformation
{
public:
 
   LinearWorldTransformation( const LinearTransformation& transIW )
      : m_transWI( transIW.Inverse() )
      , m_transIW( transIW )
   {
   }
 
   LinearWorldTransformation( const LinearWorldTransformation& ) = default;
 
   LinearWorldTransformation( LinearWorldTransformation&& ) = default;
 
   ~LinearWorldTransformation() override
   {
   }
 
   bool IsEmpty() const override
   {
      return false;
   }
 
   WorldTransformation* Clone() const override
   {
      return new LinearWorldTransformation( *this );
   }
 
   DPoint Direct( const DPoint& p ) const override
   {
      return m_transWI.Transform( p );
   }
 
   DPoint Inverse( const DPoint& p ) const override
   {
      return m_transIW.Transform( p );
   }
 
   const LinearTransformation& ApproximateLinearTransform() const override
   {
      return m_transIW;
   }
 
private:
 
   LinearTransformation m_transWI; // world -> image
   LinearTransformation m_transIW; // image -> world
};
 
// ----------------------------------------------------------------------------
 
class PCL_CLASS XMLElement;
 
class PCL_CLASS SplineWorldTransformation : public WorldTransformation
{
public:
 
   SplineWorldTransformation( const Array<DPoint>& controlPointsW,
                              const Array<DPoint>& controlPointsI,
                              float smoothness = __PCL_WCS_DEFAULT_SPLINE_SMOOTHNESS,
                              const FVector& weights = FVector(),
                              int order = __PCL_WCS_DEFAULT_SPLINE_ORDER,
                              bool enableSimplifier = __PCL_WCS_SURFACE_SIMPLIFIER_DEFAULT_ENABLED,
                              float simplifierRejectFraction = __PCL_WCS_SURFACE_SIMPLIFIER_DEFAULT_REJECT_FRACTION )
      : m_controlPointsW( controlPointsW )
      , m_controlPointsI( controlPointsI )
      , m_order( order )
      , m_smoothness( smoothness )
      , m_weights( weights )
      , m_useSimplifiers( enableSimplifier )
      , m_simplifierRejectFraction( simplifierRejectFraction )
   {
      InitializeSplines();
      CalculateLinearApproximation();
   }
 
   SplineWorldTransformation( const PropertyArray& properties,
                              const LinearTransformation& linearIW = LinearTransformation::Null() );
 
   SplineWorldTransformation( const ByteArray& data, const LinearTransformation& linearIW = LinearTransformation::Null() )
   {
      Deserialize( data );
      InitializeSplines();
      if ( linearIW.IsSingularMatrix() )
         CalculateLinearApproximation();
      else
         m_linearIW = linearIW;
   }
 
   SplineWorldTransformation( const SplineWorldTransformation& ) = default;
 
   SplineWorldTransformation( SplineWorldTransformation&& ) = default;
 
   ~SplineWorldTransformation() override
   {
   }
 
   SplineWorldTransformation& operator =( const SplineWorldTransformation& ) = default;
 
   SplineWorldTransformation& operator =( SplineWorldTransformation&& ) = default;
 
   bool IsEmpty() const override
   {
      return m_controlPointsW.IsEmpty() || m_controlPointsI.IsEmpty();
   }
 
   WorldTransformation* Clone() const override
   {
      return new SplineWorldTransformation( *this );
   }
 
   DPoint Direct( const DPoint& pW ) const override
   {
      if ( m_gridWI.IsValid() )
         if ( m_gridWI.ReferenceRect().IncludesFast( pW ) )
            return m_gridWI( pW );
      return m_splineWI( pW );
   }
 
   DPoint Inverse( const DPoint& pI ) const override
   {
      if ( m_gridIW.IsValid() )
         if ( m_gridIW.ReferenceRect().IncludesFast( pI ) )
            return m_gridIW( pI );
      return m_splineIW( pI );
   }
 
   const LinearTransformation& ApproximateLinearTransform() const override
   {
      return m_linearIW;
   }
 
   const IsoString& Version() const
   {
      return m_version;
   }
 
   void InitializeGridInterpolations( const Rect& rectI, int deltaI = 16 )
   {
      PCL_PRECONDITION( deltaI >= 1 && deltaI <= 64 )
      deltaI = Range( deltaI, 1, 64 );
 
      /*
       * Compute reference region and grid distance in native spherical
       * coordinates.
       */
      DRect rectW( std::numeric_limits<double>::max(), std::numeric_limits<double>::max(),
                   std::numeric_limits<double>::lowest(), std::numeric_limits<double>::lowest() );
      for ( int x = 0; x < rectI.Width(); ++x )
         for ( int p = 0; p < 2; ++p )
         {
            DPoint pW = m_splineIW( DPoint( double( x ), p*(rectI.Height() - 1) ) );
            if ( pW.x < rectW.x0 )
               rectW.x0 = pW.x;
            if ( pW.x > rectW.x1 )
               rectW.x1 = pW.x;
            if ( pW.y < rectW.y0 )
               rectW.y0 = pW.y;
            if ( pW.y > rectW.y1 )
               rectW.y1 = pW.y;
         }
      for ( int y = 0; y < rectI.Height(); ++y )
         for ( int p = 0; p < 2; ++p )
         {
            DPoint pW = m_splineIW( DPoint( p*(rectI.Width() - 1), double( y ) ) );
            if ( pW.x < rectW.x0 )
               rectW.x0 = pW.x;
            if ( pW.x > rectW.x1 )
               rectW.x1 = pW.x;
            if ( pW.y < rectW.y0 )
               rectW.y0 = pW.y;
            if ( pW.y > rectW.y1 )
               rectW.y1 = pW.y;
         }
      double deltaW = m_splineIW( DPoint( -deltaI/2, -deltaI/2 ) ).DistanceTo(
                      m_splineIW( DPoint( +deltaI/2, +deltaI/2 ) ) )/1.4142;
 
      m_gridWI.Initialize( rectW, deltaW, m_splineWI, false/*verbose*/ );
      m_gridIW.Initialize( rectI, deltaI, m_splineIW, false/*verbose*/ );
   }
 
   bool HasGridInterpolations() const
   {
      return m_gridWI.IsValid() && m_gridIW.IsValid();
   }
 
   static IsoString PropertyPrefix()
   {
      return "PCL:AstrometricSolution:SplineWorldTransformation:";
   }
 
   PropertyArray ToProperties() const;
 
   void Serialize( ByteArray& data ) const;
 
   int NumberOfControlPoints() const
   {
      return int( m_controlPointsW.Length() );
   }
 
   const Array<DPoint>& NativeControlPoints() const
   {
      return m_controlPointsW;
   }
 
   const Array<DPoint>& ImageControlPoints() const
   {
      return m_controlPointsI;
   }
 
   int SplineOrder() const
   {
      return m_order;
   }
 
   void GetSplineLengths( int& xWI, int& yWI, int& xIW, int& yIW ) const
   {
      xWI = m_splineWI.SplineX().Length();
      yWI = m_splineWI.SplineY().Length();
      xIW = m_splineIW.SplineX().Length();
      yIW = m_splineIW.SplineY().Length();
   }
 
   bool TruncatedControlPoints() const
   {
      return m_truncated; // fetched during initialization
   }
 
   bool SimplifiersEnabled() const
   {
      return m_useSimplifiers;
   }
 
   float SimplifierRejectFraction() const
   {
      return m_simplifierRejectFraction;
   }
 
   void GetSplineErrors( double& xWI, double& yWI, double& xIW, double& yIW ) const
   {
      xWI = m_splineWI.ErrorX();
      yWI = m_splineWI.ErrorY();
      xIW = m_splineIW.ErrorX();
      yIW = m_splineIW.ErrorY();
   }
 
private:
 
   IsoString              m_version = "1.3";
   Array<DPoint>          m_controlPointsW;
   Array<DPoint>          m_controlPointsI;
   int                    m_order = __PCL_WCS_DEFAULT_SPLINE_ORDER;
   float                  m_smoothness = __PCL_WCS_DEFAULT_SPLINE_SMOOTHNESS;
   FVector                m_weights;
   bool                   m_useSimplifiers = __PCL_WCS_SURFACE_SIMPLIFIER_DEFAULT_ENABLED;
   float                  m_simplifierRejectFraction = __PCL_WCS_SURFACE_SIMPLIFIER_DEFAULT_REJECT_FRACTION;
   bool                   m_truncated = false; // true => truncated control point vectors
   Homography             m_projectiveWI;
   Homography             m_projectiveIW;
   PointSurfaceSpline     m_splineWI;
   PointSurfaceSpline     m_splineIW;
   PointGridInterpolation m_gridWI;
   PointGridInterpolation m_gridIW;
   LinearTransformation   m_linearIW;
 
   static PointSurfaceSpline PointSurfaceSplineFromProperties( const PropertyArray& );
   static PropertyArray PointSurfaceSplineToProperties( const PointSurfaceSpline&, const IsoString& );
 
   static SurfaceSpline<double> SurfaceSplineFromProperties( const PropertyArray& );
   static PropertyArray SurfaceSplineToProperties( const SurfaceSpline<double>&, const IsoString& );
 
   static PointGridInterpolation PointGridInterpolationFromProperties( const PropertyArray& );
   static PropertyArray PointGridInterpolationToProperties( const PointGridInterpolation&, const IsoString& );
 
   void Deserialize( const ByteArray& );
   void InitializeSplines();
   void CalculateLinearApproximation();
};
 
// ----------------------------------------------------------------------------
 
} // pcl
 
#endif   // __PCL_WorldTransformation_h
 
// ----------------------------------------------------------------------------
// EOF pcl/WorldTransformation.h - Released 2024-05-07T15:27:32Z