LanczosSincFilter Class Reference

2D symmetric Lanczos filter whose aim is to approximate a truncated sinc (the ideal reconstruction filter) while minimizing the amount of visible ringing resulting from the truncation More...

#include <LanczosSincFilter.h>

Inheritance diagram for LanczosSincFilter:

List of all members.

Public Member Functions
Constructors
	LanczosSincFilter (real_t support=2, real_t tau=3.0)
virtual	~LanczosSincFilter ()
Initialization
virtual void	init ()
	Performs any initialization which may be necessary before filter evaluation.
Main usage interface
virtual real_t	evaluate (const Vector2 &pt)
Protected Member Functions
real_t	_evaluate (real_t x) const
	1D LanczosSinc filter
Protected Attributes
real_t	m_tau

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Detailed Description

2D symmetric Lanczos filter whose aim is to approximate a truncated sinc (the ideal reconstruction filter) while minimizing the amount of visible ringing resulting from the truncation

Author:

Travis Fischer (fisch0920@gmail.com)

Matthew Jacobs (jacobs.mh@gmail.com)

Date:

Fall 2008

Note:

LanczosSinc Filter taken from PBRT (Pharr, Humphreys) http://www.pbrt.org

Definition at line 22 of file LanczosSincFilter.h.

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Constructor & Destructor Documentation

LanczosSincFilter::LanczosSincFilter	(	real_t	support = 2,
		real_t	tau = 3.0
	)			[inline]

Definition at line 27 of file LanczosSincFilter.h.

virtual LanczosSincFilter::~LanczosSincFilter

(

)

[inline, virtual]

Definition at line 31 of file LanczosSincFilter.h.

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Member Function Documentation

void LanczosSincFilter::init

(

)

[virtual]

Performs any initialization which may be necessary before filter evaluation.

Note:

Default implementation initializes the filter support based on its PropertyMap

Reimplemented from KernelFilter.

Definition at line 19 of file LanczosSincFilter.cpp.

real_t LanczosSincFilter::evaluate

(

const Vector2 &

pt

)

[virtual]

Returns:

the value of this filter function evaluated at the given point

Implements KernelFilter.

Definition at line 25 of file LanczosSincFilter.cpp.

real_t LanczosSincFilter::_evaluate

(

real_t

x

)

const [protected]

1D LanczosSinc filter

Definition at line 29 of file LanczosSincFilter.cpp.

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Member Data Documentation

real_t LanczosSincFilter::m_tau [protected]

Definition at line 60 of file LanczosSincFilter.h.

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

• LanczosSincFilter.h
• LanczosSincFilter.cpp