GaussianFilter Struct Reference

#include <Resample.h>

Inheritance diagram for GaussianFilter:

Public Types
typedef boost::shared_ptr< const GaussianFilter >	CPtr
typedef boost::shared_ptr< GaussianFilter >	Ptr
Public Types inherited from Filter
typedef boost::shared_ptr< const Filter >	CPtr
typedef boost::shared_ptr< Filter >	Ptr

Public Member Functions
virtual float	eval (const float t) const
	Evaluates the filter at coordinate 't'. More...
	GaussianFilter (const float alpha=2.0, const float width=2.0)
virtual float	support () const
	Radial width of the filter (half of diameter) More...

Private Attributes
const float	m_alpha
const float	m_exp
const float	m_width

Detailed Description

Definition at line 174 of file Resample.h.

Member Typedef Documentation

typedef boost::shared_ptr<GaussianFilter> GaussianFilter::Ptr

Definition at line 177 of file Resample.h.

typedef boost::shared_ptr<const GaussianFilter> GaussianFilter::CPtr

Definition at line 178 of file Resample.h.

Constructor & Destructor Documentation

GaussianFilter::GaussianFilter ( const float  alpha = 2.0, const float  width = 2.0  )

inline

Definition at line 180 of file Resample.h.

    : m_alpha(alpha), 
      m_exp(std::exp(-alpha * width * width)),
      m_width(width)
  { /* Empty */ }

Member Function Documentation

virtual float GaussianFilter::eval ( const float  t ) const

inlinevirtual

Evaluates the filter at coordinate 't'.

Implements Filter.

Definition at line 186 of file Resample.h.

  {
    const float x = t / m_width;
    return std::max(0.0f, std::exp(-m_alpha * x * x) - m_exp);
  }

virtual float GaussianFilter::support ( ) const

inlinevirtual

Radial width of the filter (half of diameter)

Implements Filter.

Definition at line 191 of file Resample.h.

  {
    return 2.0f * m_width;
  }

Member Data Documentation

const float GaussianFilter::m_alpha

private

Definition at line 196 of file Resample.h.

const float GaussianFilter::m_exp

private

Definition at line 196 of file Resample.h.

const float GaussianFilter::m_width

private

Definition at line 196 of file Resample.h.

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

• export/Resample.h