A.I.M.S algorithms


seventhorderresampler_d.h
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33 
34 
35 #ifndef AIMS_RESAMPLING_SEVENTHORDERRESAMPLER_D_H
36 #define AIMS_RESAMPLING_SEVENTHORDERRESAMPLER_D_H
37 
38 #include <cstdlib>
40 #include <aims/utility/channel.h>
41 
42 template < class T >
44  : SplineResampler< T >()
45 {
46 
47  this->_poles.push_back(
48  -0.5352804307964381655424037816816460718339231523426924148812 );
49  this->_poles.push_back(
50  -0.122554615192326690515272264359357343605486549427295558490763 );
51  this->_poles.push_back(
52  -0.0091486948096082769285930216516478534156925639545994482648003 );
53  this->_gain = 3.0248282036441843886795463832305782146916878615537002580987;
54 
55 }
56 
57 
58 template < class T >
60 {
61 }
62 
63 
64 template < class T >
66 {
67 
68  return 7;
69 
70 }
71 
72 
73 template < class T >
74 double SeventhOrderResampler< T >::getBSplineWeight( int i, double x ) const
75 {
76 
77  x = std::fabs( x - ( double )i );
78  if ( x < 1.0 )
79  {
80 
81  double f = x * x;
82  return f * ( f * ( f * ( x * ( 1.0 / 144.0 ) - 1.0 / 36.0 ) + 1.0 / 9.0 ) -
83  1.0 / 3.0 ) + 151.0 / 315.0;
84 
85  }
86  if ( x < 2.0 )
87  {
88 
89  return x * ( x * ( x * ( x * ( x * ( x * ( 0.05 - x * ( 1.0 / 240.0 ) ) -
90  7.0 / 30.0 ) + 0.5 ) - 7.0 / 18.0 ) - 0.1 ) - 7.0 / 90.0 ) +
91  103.0 / 210.0;
92 
93  }
94  if ( x < 3.0 )
95  {
96 
97  return x * ( x * ( x * ( x * ( x * ( x * ( x * ( 1.0 / 720.0 ) -
98  1.0 / 36.0 ) + 7.0 / 30.0 ) - 19.0 / 18.0 ) + 49.0 / 18.0 ) -
99  23.0 / 6.0 ) + 217.0 / 90.0 ) - 139.0 / 630.0;
100 
101  }
102  if ( x < 4.0 )
103  {
104 
105  double f = 4.0 - x;
106  x = f * f * f;
107  return x * x * f * ( 1.0 / 5040.0 );
108 
109  }
110  return 0.0;
111 
112 }
113 
114 // AimsRGB Specialization
117 
118 #endif
119 
#define AIMS_RESAMPLING_INSTANCIATE_MULTICHANNELRESAMPLER(R, T)
B-Spline-based resampling.
double getBSplineWeight(int i, double x) const
Returns B^n( x - i )
std::vector< double > _poles
int getOrder() const
Spline order (1 to 7)