lti::octagonalKernel< T > Class Template Reference

octagonal filter kernel More...

#include <ltiBinaryKernels.h>

Inheritance diagram for lti::octagonalKernel< T >:

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Collaboration diagram for lti::octagonalKernel< T >:

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List of all members.

Public Member Functions
	octagonalKernel (const int &size=3, const T &onValue=lti::typeInfo< T >::suggestedNorm()/T(255))
void	generate (const int &size, const T &onValue=lti::typeInfo< T >::suggestedNorm()/T(255))

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Detailed Description

template<class T = float>
class lti::octagonalKernel< T >

octagonal filter kernel

This binary filter kernel (values only 0 or 1) is used as a structuring element for erosion/dilation operations

The onValue is important if e.g. erosion::parameters::Gray is used. For Binary mode the exact value of onValue is not relevant. Default is typeInfo<T>::suggestedNorm()/255, i.e. 1 for ubyte and 0.003921 for float.

The possible sizes are all odd values greater/equal 3.

The kernel norm is set to the typeInfo<T>::suggestedNorm() so the result is the expected black and white image.

An example of an octagonal kernel of size seven:

          - - 1 1 1 - -
          - 1 1 1 1 1 -
          1 1 1 1 1 1 1
          1 1 1 1 1 1 1
          1 1 1 1 1 1 1
          - 1 1 1 1 1 -
          - - 1 1 1 - -

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Constructor & Destructor Documentation

template<class T = float>

lti::octagonalKernel< T >::octagonalKernel	(	const int &	size = 3,
		const T &	onValue = lti::typeInfo< T >::suggestedNorm()/T(255)
	)

constructor

Parameters:

	size	is the dimension of the one dimensional part (i.e. the filter kern is a size x size kernel!) This must be an odd value greater/equal 3. If another value is given, the next valid odd value will be assumed.
	onValue	value different from zero in the kernel.

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Member Function Documentation

template<class T = float>

void lti::octagonalKernel< T >::generate	(	const int &	size,
		const T &	onValue = lti::typeInfo< T >::suggestedNorm()/T(255)
	)

initialize this kernel with the specified values

Parameters:

	size	is the dimension of the one dimensional part (i.e. the filter kern is a size x size kernel!) This must be an odd value greater/equal 3. If another value is given, the next valid odd value will be assumed.
	onValue	value different from zero in the kernel.

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

• ltiBinaryKernels.h