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| CatmullRomSpline [Mathematical Functions] |

`#include <vigra/splines.hxx>`

List of all members.

## Public Types

typedef T | argument_type
typedef T | result_type
enum | StaticOrder
typedef T | value_type

## Public Member Functions

unsigned int | derivativeOrder () const
result_type | operator() (argument_type x) const
T | operator[] (T x) const
ArrayVector< double > const & | prefilterCoefficients () const
int | radius () const

## Detailed Description

### template<class T = double>
class vigra::CatmullRomSpline< T >

Interpolating 3-rd order splines.

Implements the Catmull/Rom cardinal function

It can be used as a functor, and as a kernel for resamplingConvolveImage() to create a differentiable interpolant of an image. However, it should be noted that a twice differentiable interpolant can be created with only slightly more effort by recursive prefiltering followed by convolution with a 3rd order B-spline.

#include <vigra/splines.hxx>
Namespace: vigra

## Member Typedef Documentation

typedef T argument_type

the unary functor's argument type

typedef T result_type

the unary functor's result type

typedef T value_type

the kernel's value type

## Member Enumeration Documentation

enum StaticOrder

the splines polynomial order

## Member Function Documentation

unsigned int derivativeOrder | ( |  | ) | const

Derivative order of the function: always 0.

T operator[] | ( | T | x | ) | const

index operator -- same as operator()

ArrayVector<double> const& prefilterCoefficients | ( |  | ) | const

Prefilter coefficients for compatibility with vigra::BSpline. (array has zero length, since prefiltering is not necessary).

int radius | ( |  | ) | const

Radius of the function's support. Needed for resamplingConvolveImage(), always 2.

The documentation for this class was generated from the following file:

- vigra/splines.hxx

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany | html generated using doxygen and Python vigra 1.7.1 (3 Dec 2010)