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prapi::texture::SgnDiff< T > Class Template Reference

#include <SgnDiff.h>

Inheritance diagram for prapi::texture::SgnDiff< T >:

List of all members.

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Detailed Description

template<class T>
class prapi::texture::SgnDiff< T >

A class for calculating signed differences from an matrix.

For each pixel, a local neighborhood is formed, and the difference between the center pixel and one of the neighbors is calculated. The difference is used as a feature value for the center pixel. Assuming 8 bit matrices, the signed differences vary in range [-255,255].

Public Methods
	SgnDiff (unsigned int predicate=1)
	Create a SgnDiff object that calculates the signed difference with the given distance, i.e.
T	getValue (int center, util::List< T > &surrounding)
void	setDifferenceIndex (unsigned int index) throw (util::InvalidArgumentException&)
	Set the difference index.
unsigned int	getDifferenceIndex () const
	Get the difference index.

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Constructor & Destructor Documentation

template<class T> prapi::texture::SgnDiff< T >::SgnDiff (  unsigned int    predicate = 1 )  [inline]

Create a SgnDiff object that calculates the signed difference with the given distance, i.e. predicate.

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Member Function Documentation

template<class T> void prapi::texture::SgnDiff< T >::setDifferenceIndex (  unsigned int    index )  throw (util::InvalidArgumentException&)

Set the difference index. The number of samples in CircularLocalSampler determines the maximum possible difference index. By default, 0 is used, which typically means the difference in positive x axis direction. Exceptions: InvalidArgumentException  if index is greater than or equal to the number of neighborhood samples

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

• SgnDiff.h

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Documentation generated on 11.09.2003 with Doxygen.
The documentation is copyrighted material.
Copyright © Topi Mäenpää 2003. All rights reserved.