lti::classicEdgeDetector Class Reference
[Edge and Corner Detectors]

This class implements simple standard edgedectors like Sobel. More...

#include <ltiClassicEdgeDetector.h>

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List of all members.

Classes
class	parameters
	The parameters for the class classicEdgeDetector. More...
Public Member Functions
	classicEdgeDetector ()
	classicEdgeDetector (const parameters &par)
	classicEdgeDetector (const classicEdgeDetector &other)
virtual	~classicEdgeDetector ()
virtual const char *	getTypeName () const
classicEdgeDetector &	copy (const classicEdgeDetector &other)
classicEdgeDetector &	operator= (const classicEdgeDetector &other)
virtual functor *	clone () const
const parameters &	getParameters () const
virtual bool	apply (const channel &src, channel8 &edges) const
virtual bool	apply (channel8 &srcdest) const
virtual bool	updateParameters (const parameters &theParam)
Protected Attributes
gradientFunctor	gradienter

---

Detailed Description

This class implements simple standard edgedectors like Sobel.

It uses a gradient functor to create a gradient magnitude. Furthermore it uses nonMaximaSuppression or thresholding to extract the edges.

 #include ltiClassicEdgeDetector.h

 channel src;
 channel8 edges;

 classicEdgeDetector::parameters cedPar;
 // using thresholding instead of standard nonMaximaSuppression
 thresholding::parameters tPar;
 tPar.highThreshold = 0.8;
 thresholding t(tPar);

 cedPar.setMaximaSearchMethod(t);
 cedPar.gradientParameters.kernelType = gradientFunctor::parameters::Prewitt;

 // This has NO effect, because setMaximaSearchMethod was used
 // so the thresholding functor was copied
 tPar.highTreshold = 0.5;
 t.setParameters(tPar);

 classicEdgeDetector ced(cedPar);

 ced.apply(src,edges);

---

Constructor & Destructor Documentation

lti::classicEdgeDetector::classicEdgeDetector

(

)

default constructor

lti::classicEdgeDetector::classicEdgeDetector

(

const parameters &

par

)

Construct a functor using the given parameters.

lti::classicEdgeDetector::classicEdgeDetector

(

const classicEdgeDetector &

other

)

Copy constructor.

Parameters:

other

the object to be copied

virtual lti::classicEdgeDetector::~classicEdgeDetector

(

)

[virtual]

Destructor.

---

Member Function Documentation

virtual bool lti::classicEdgeDetector::apply

(

channel8 &

srcdest

)

const [virtual]

operates on the given parameters

Parameters:

srcdest

channel with the source data. The result will be left here too.

Returns:

true if apply successful or false otherwise.

Reimplemented from lti::edgeDetector.

virtual bool lti::classicEdgeDetector::apply	(	const channel &	src,
		channel8 &	edges
	)			const [virtual]

operates on the given parameters

Parameters:

	src	channel with the Source data.
	edges	channel where the result will be left.

Returns:

true if apply successful or false otherwise.

Reimplemented from lti::edgeDetector.

virtual functor* lti::classicEdgeDetector::clone

(

)

const [virtual]

Returns a pointer to a clone of this functor.

Implements lti::edgeDetector.

classicEdgeDetector& lti::classicEdgeDetector::copy

(

const classicEdgeDetector &

other

)

Copy data of "other" functor.

Parameters:

other

the functor to be copied

Returns:

a reference to this functor object

Reimplemented from lti::edgeDetector.

const parameters& lti::classicEdgeDetector::getParameters

(

)

const

returns used parameters

Reimplemented from lti::edgeDetector.

virtual const char* lti::classicEdgeDetector::getTypeName

(

)

const [virtual]

returns the name of this type ("classicEdgeDetector")

Reimplemented from lti::edgeDetector.

classicEdgeDetector& lti::classicEdgeDetector::operator=

(

const classicEdgeDetector &

other

)

Alias for copy member.

Parameters:

other

the functor to be copied

Returns:

a reference to this functor object

Reimplemented from lti::edgeDetector.

virtual bool lti::classicEdgeDetector::updateParameters

(

const parameters &

theParam

)

[virtual]

update functor's parameters.

This member initializes some internal data depending on the parameter set.

if using Thresholding as maxima search method:

• thresholding::parameters::inRegionValue will be overwritten by edgeDetector::parameters::edgeValue (divided by 255)
• thresholding::parameters::outRegionValue will be overwritten by edgeDetector::parameters::noEdgeValue (divided by 255)
• thresholding::parameters::keepInRegion will always be set to false
• thresholding::parameters::keepOutRegion will always be set to false

if using nonMaximaSuppression as maxima search method:

• nonMaximaSuppression::parameters.edgeValue will be overwritten by edgeDetector::parameters::edgeValue
• nonMaximaSuppression::parameters.background will be overwritten by edgeDetector::parameters::noEdgeValue
• nonMaximaSuppression::parameters.checkAngles will always be set to false

Parameters:

theParam

the parameters which should be set

Returns:

true if successful, false otherwise

---

Member Data Documentation

gradientFunctor lti::classicEdgeDetector::gradienter [protected]

functor which is used to compute the gradient

---

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

• ltiClassicEdgeDetector.h