A.I.M.S algorithms


sixthorderresampler_d.h
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33 
34 
35 #ifndef AIMS_RESAMPLING_SIXTHORDERRESAMPLER_D_H
36 #define AIMS_RESAMPLING_SIXTHORDERRESAMPLER_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  -0.488294589303044755130118038883789062112279161239377608394 );
49  this->_poles.push_back(
50  -0.081679271076237512597937765737059080653379610398148178525368 );
51  this->_poles.push_back(
52  -0.00141415180832581775108724397655859252786416905534669851652709 );
53  this->_gain = 2.598975999348577818390170516255374207847876853191217652822;
54 
55 }
56 
57 
58 template < class T >
60 {
61 }
62 
63 
64 template < class T >
66 {
67 
68  return 6;
69 
70 }
71 
72 
73 template < class T >
74 double SixthOrderResampler< T >::getBSplineWeight( int i, double x ) const
75 {
76 
77  x = std::fabs( x - ( double )i );
78  if ( x < 0.5 )
79  {
80 
81  x *= x;
82  return x * ( x * ( 7.0 / 48.0 - x * ( 1.0 / 36.0 ) ) - 77.0 / 192.0 ) +
83  5887.0 / 11520.0;
84 
85  }
86  if ( x < 1.5 )
87  {
88 
89  return x * ( x * ( x * ( x * ( x * ( x * ( 1.0 / 48.0 ) - 7.0 / 48.0 ) +
90  0.328125 ) - 35.0 / 288.0 ) - 91.0 / 256.0 ) - 7.0 / 768.0 ) +
91  7861.0 / 15360.0;
92 
93  }
94  if ( x < 2.5 )
95  {
96 
97  return x * ( x * ( x * ( x * ( x * ( 7.0 / 60.0 - x * ( 1.0 / 120.0 ) ) -
98  0.65625 ) + 133.0 / 72.0 ) - 2.5703125 ) + 1267.0 / 960.0 ) +
99  1379.0 / 7680.0;
100 
101  }
102  if ( x < 3.5 )
103  {
104 
105  x -= 3.5;
106  x *= x * x;
107  return x * x * ( 1.0 / 720.0 );
108 
109  }
110  return 0.0;
111 
112 }
113 
114 // AimsRGB Specialization
117 
118 #endif
119 
#define AIMS_RESAMPLING_INSTANCIATE_MULTICHANNELRESAMPLER(R, T)
double getBSplineWeight(int i, double x) const
Returns B^n( x - i )
B-Spline-based resampling.
std::vector< double > _poles
int getOrder() const
Spline order (1 to 7)