JeVoisBase  1.22
JeVois Smart Embedded Machine Vision Toolkit Base Modules
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Public Member Functions | Related Symbols | List of all members
EdgeDetection Class Reference
JeVoisBase machine vision modules

Simple module to detect edges using the Canny algorithm from OpenCV. More...

Inheritance diagram for EdgeDetection:
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Collaboration diagram for EdgeDetection:
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Public Member Functions

virtual ~EdgeDetection ()
 Virtual destructor for safe inheritance.
 
virtual void process (jevois::InputFrame &&inframe, jevois::OutputFrame &&outframe) override
 Processing function.
 
virtual void process (jevois::InputFrame &&inframe, jevois::GUIhelper &helper) override
 Processing function with zero-copy and GUI on JeVois-Pro.
 
- Public Member Functions inherited from jevois::Module
 Module (std::string const &instance)
 
virtual ~Module ()
 
virtual void process (InputFrame &&inframe)
 
virtual void sendSerial (std::string const &str)
 
virtual void parseSerial (std::string const &str, std::shared_ptr< UserInterface > s)
 
virtual void supportedCommands (std::ostream &os)
 
- Public Member Functions inherited from jevois::Component
 Component (std::string const &instance)
 
virtual ~Component ()
 
std::shared_ptr< Comp > addSubComponent (std::string const &instance, Args &&...args)
 
void removeSubComponent (std::shared_ptr< Comp > &component)
 
void removeSubComponent (std::string const &instance, bool warnIfNotFound=true)
 
std::shared_ptr< Comp > getSubComponent (std::string const &instance) const
 
bool isTopLevel () const
 
bool initialized () const
 
std::string const & className () const
 
std::string const & instanceName () const
 
std::vector< std::string > setParamVal (std::string const &paramdescriptor, T const &val)
 
void setParamValUnique (std::string const &paramdescriptor, T const &val)
 
std::vector< std::pair< std::string, T > > getParamVal (std::string const &paramdescriptor) const
 
T getParamValUnique (std::string const &paramdescriptor) const
 
std::vector< std::string > setParamString (std::string const &paramdescriptor, std::string const &val)
 
void setParamStringUnique (std::string const &paramdescriptor, std::string const &val)
 
std::vector< std::pair< std::string, std::string > > getParamString (std::string const &paramdescriptor) const
 
std::string getParamStringUnique (std::string const &paramdescriptor) const
 
void freezeParam (std::string const &paramdescriptor, bool doit)
 
void freezeAllParams (bool doit)
 
std::string descriptor () const
 
void setParamsFromFile (std::string const &filename)
 
std::istream & setParamsFromStream (std::istream &is, std::string const &absfile)
 
virtual void paramInfo (std::shared_ptr< UserInterface > s, std::map< std::string, std::string > &categs, bool skipFrozen, std::string const &cname="", std::string const &pfx="")
 
void foreachParam (std::function< void(std::string const &compname, ParameterBase *p)> func, std::string const &cname="")
 
std::shared_ptr< DynamicParameter< T > > addDynamicParameter (std::string const &name, std::string const &description, T const &defaultValue, ParameterCategory const &category)
 
std::shared_ptr< DynamicParameter< T > > addDynamicParameter (std::string const &name, std::string const &description, T const &defaultValue, ValidValuesSpec< T > const &validValuesSpec, ParameterCategory const &category)
 
void setDynamicParameterCallback (std::string const &name, std::function< void(T const &)> cb, bool callnow=true)
 
void removeDynamicParameter (std::string const &name, bool throw_if_not_found=true)
 
void setPath (std::string const &path)
 
std::filesystem::path absolutePath (std::filesystem::path const &path="")
 
std::shared_ptr< Comp > addSubComponent (std::string const &instance, Args &&...args)
 
void removeSubComponent (std::shared_ptr< Comp > &component)
 
void removeSubComponent (std::string const &instance, bool warnIfNotFound=true)
 
std::shared_ptr< Comp > getSubComponent (std::string const &instance) const
 
bool isTopLevel () const
 
bool initialized () const
 
std::string const & className () const
 
std::string const & instanceName () const
 
std::vector< std::string > setParamVal (std::string const &paramdescriptor, T const &val)
 
void setParamValUnique (std::string const &paramdescriptor, T const &val)
 
std::vector< std::pair< std::string, T > > getParamVal (std::string const &paramdescriptor) const
 
T getParamValUnique (std::string const &paramdescriptor) const
 
std::vector< std::string > setParamString (std::string const &paramdescriptor, std::string const &val)
 
void setParamStringUnique (std::string const &paramdescriptor, std::string const &val)
 
std::vector< std::pair< std::string, std::string > > getParamString (std::string const &paramdescriptor) const
 
std::string getParamStringUnique (std::string const &paramdescriptor) const
 
void freezeParam (std::string const &paramdescriptor, bool doit)
 
void freezeAllParams (bool doit)
 
std::string descriptor () const
 
void setParamsFromFile (std::string const &filename)
 
std::istream & setParamsFromStream (std::istream &is, std::string const &absfile)
 
virtual void paramInfo (std::shared_ptr< UserInterface > s, std::map< std::string, std::string > &categs, bool skipFrozen, std::string const &cname="", std::string const &pfx="")
 
void foreachParam (std::function< void(std::string const &compname, ParameterBase *p)> func, std::string const &cname="")
 
std::shared_ptr< DynamicParameter< T > > addDynamicParameter (std::string const &name, std::string const &description, T const &defaultValue, ParameterCategory const &category)
 
std::shared_ptr< DynamicParameter< T > > addDynamicParameter (std::string const &name, std::string const &description, T const &defaultValue, ValidValuesSpec< T > const &validValuesSpec, ParameterCategory const &category)
 
void setDynamicParameterCallback (std::string const &name, std::function< void(T const &)> cb, bool callnow=true)
 
void removeDynamicParameter (std::string const &name, bool throw_if_not_found=true)
 
void setPath (std::string const &path)
 
std::filesystem::path absolutePath (std::filesystem::path const &path="")
 
- Public Member Functions inherited from jevois::ParameterRegistry
virtual ~ParameterRegistry ()
 

Related Symbols

(Note that these are not member symbols.)

 JEVOIS_DECLARE_PARAMETER (thresh1, double, "First threshold for hysteresis", 50.0, ParamCateg)
 Parameter.
 
 JEVOIS_DECLARE_PARAMETER (thresh2, double, "Second threshold for hysteresis", 150.0, ParamCateg)
 Parameter.
 
 JEVOIS_DECLARE_PARAMETER (aperture, int, "Aperture size for the Sobel operator", 3, ParamCateg)
 Parameter.
 
 JEVOIS_DECLARE_PARAMETER (l2grad, bool, "Use more accurate L2 gradient norm if true, L1 if false", false, ParamCateg)
 Parameter.
 

Additional Inherited Members

- Protected Member Functions inherited from jevois::Component
virtual void preInit ()
 
virtual void postInit ()
 
virtual void preUninit ()
 
virtual void postUninit ()
 
virtual void preInit ()
 
virtual void postInit ()
 
virtual void preUninit ()
 
virtual void postUninit ()
 
- Protected Member Functions inherited from jevois::ParameterRegistry
void addParameter (ParameterBase *const param)
 
void removeParameter (ParameterBase *const param)
 
void callbackInitCall ()
 

Detailed Description

Simple module to detect edges using the Canny algorithm from OpenCV.

Compute edges in an image using the Canny edge detection algorithm.

This module is intended as a pre-processor, delivering edge maps to a host computer, which may then be in charge of further processing them, for example to detect objects of various shapes.

You should be able to run this module at 60 frames/s with resolution 320x240 on the JeVois camera.

Author
Laurent Itti
Videomapping:
GREY 640 480 29.0 YUYV 640 480 29.0 JeVois EdgeDetection
Videomapping:
GREY 320 240 59.0 YUYV 320 240 59.0 JeVois EdgeDetection
Videomapping:
GREY 176 144 119.0 YUYV 176 144 119.0 JeVois EdgeDetection
Email:
itti@usc.edu
Address:
University of Southern California, HNB-07A, 3641 Watt Way, Los Angeles, CA 90089-2520, USA
Copyright
Copyright (C) 2016 by Laurent Itti, iLab and the University of Southern California
Main URL:
http://jevois.org
Support URL:
http://jevois.org/doc
Other URL:
http://iLab.usc.edu
License:
GPL v3
Distribution:
Unrestricted
Restrictions:
None

Definition at line 63 of file EdgeDetection.C.

Constructor & Destructor Documentation

◆ ~EdgeDetection()

virtual EdgeDetection::~EdgeDetection ( )
inlinevirtual

Virtual destructor for safe inheritance.

Definition at line 71 of file EdgeDetection.C.

Member Function Documentation

◆ process() [1/2]

virtual void EdgeDetection::process ( jevois::InputFrame &&  inframe,
jevois::GUIhelper &  helper 
)
inlineoverridevirtual

Processing function with zero-copy and GUI on JeVois-Pro.

Reimplemented from jevois::Module.

Definition at line 102 of file EdgeDetection.C.

References jevois::rawimage::convertToCvGray(), jevois::GUIhelper::drawImage(), jevois::GUIhelper::drawInputFrame(), jevois::GUIhelper::endFrame(), jevois::GUIhelper::iinfo(), jevois::GUIhelper::itext(), jevois::Timer::start(), jevois::GUIhelper::startFrame(), and jevois::Timer::stop().

◆ process() [2/2]

virtual void EdgeDetection::process ( jevois::InputFrame &&  inframe,
jevois::OutputFrame &&  outframe 
)
inlineoverridevirtual

Processing function.

Reimplemented from jevois::Module.

Definition at line 74 of file EdgeDetection.C.

References jevois::rawimage::convertToCvGray(), jevois::rawimage::cvImage(), jevois::RawImage::height, jevois::RawImage::require(), and jevois::RawImage::width.

Friends And Related Symbol Documentation

◆ JEVOIS_DECLARE_PARAMETER() [1/4]

JEVOIS_DECLARE_PARAMETER ( aperture  ,
int  ,
"Aperture size for the Sobel operator"  ,
3  ,
ParamCateg   
)
related

Parameter.

◆ JEVOIS_DECLARE_PARAMETER() [2/4]

JEVOIS_DECLARE_PARAMETER ( l2grad  ,
bool  ,
"Use more accurate L2 gradient norm if  true,
L1 if false"  ,
false  ,
ParamCateg   
)
related

Parameter.

◆ JEVOIS_DECLARE_PARAMETER() [3/4]

JEVOIS_DECLARE_PARAMETER ( thresh1  ,
double  ,
"First threshold for hysteresis"  ,
50.  0,
ParamCateg   
)
related

Parameter.

◆ JEVOIS_DECLARE_PARAMETER() [4/4]

JEVOIS_DECLARE_PARAMETER ( thresh2  ,
double  ,
"Second threshold for hysteresis"  ,
150.  0,
ParamCateg   
)
related

Parameter.

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