SUSANEdgeDetectionLite Class Reference

This class represents a non-linear image edge detection filter. More...

#include <SUSANEdgeDetectionLite.h>

List of all members.

Public Types
enum	ColorSpectra { componentA = 0, componentB, componentC }
enum	{ GEOMETRIC_THRESHOLD = 255*8*3/4 }
Public Member Functions
	SUSANEdgeDetectionLite (int edgeThreshold)
	Constructor.
	~SUSANEdgeDetectionLite ()
	Destructor.
bool	isEdgePoint (const Image &image, int X, int Y, ColorSpectra channel) const
	Checks if a given point is an edge point.
Private Member Functions
void	setupSusanLUT (int threshold)
	Initializes the LookUpTable.
unsigned char	correlation (int delta) const
	The correlation function, precomputed.
Private Attributes
unsigned char	Susan_LUT [255]
	A LookUpTable containing a correlation function.

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Detailed Description

This class represents a non-linear image edge detection filter.

Unlike traditional edge detectors gradient based like Sobel or LoG, this filter doesnt perform a derivative operation on the image, (which is an hi-pass characteristic) thus has a better noise-rejection performance. This implementation is dubbed "Lite" as the heaviest passes of the full algorithm (edge direction calculation, non-maxima suppression, binary thinning) have been stripped out for performance reasons.

Author:

Walter Nistico

Definition at line 26 of file SUSANEdgeDetectionLite.h.

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Member Enumeration Documentation

enum SUSANEdgeDetectionLite::ColorSpectra

Enumeration values: componentA  componentB  componentC  Definition at line 31 of file SUSANEdgeDetectionLite.h.

anonymous enum

Enumeration values: GEOMETRIC_THRESHOLD  Definition at line 32 of file SUSANEdgeDetectionLite.h.

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Constructor & Destructor Documentation

SUSANEdgeDetectionLite::SUSANEdgeDetectionLite (  int  edgeThreshold  )

Constructor. Definition at line 11 of file SUSANEdgeDetectionLite.cpp. References setupSusanLUT().

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SUSANEdgeDetectionLite::~SUSANEdgeDetectionLite (   )

Destructor. Definition at line 16 of file SUSANEdgeDetectionLite.cpp.

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Member Function Documentation

bool SUSANEdgeDetectionLite::isEdgePoint (  const Image &  image, int  X, int  Y, ColorSpectra  channel )  const

Checks if a given point is an edge point. Parameters: image  The source image X  The X coordinate of the given point Y  The Y coordinate of the given point channel  The chosen color spectrum (Y, U, or V for ex.) Returns: is the point an edge point? Definition at line 30 of file SUSANEdgeDetectionLite.cpp. References correlation(), GEOMETRIC_THRESHOLD, and Image::image. Referenced by GT2004BeaconDetector::scanForBeaconPart(), and REdgeDetection::susanVote().

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void SUSANEdgeDetectionLite::setupSusanLUT (  int  threshold  )  [private]

Initializes the LookUpTable. Definition at line 19 of file SUSANEdgeDetectionLite.cpp. Referenced by SUSANEdgeDetectionLite().

unsigned char SUSANEdgeDetectionLite::correlation (  int  delta  )  const [inline, private]

The correlation function, precomputed. Definition at line 65 of file SUSANEdgeDetectionLite.h. Referenced by isEdgePoint().

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Member Data Documentation

unsigned char SUSANEdgeDetectionLite::Susan_LUT[255] [private]

A LookUpTable containing a correlation function. Definition at line 55 of file SUSANEdgeDetectionLite.h.

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

• Modules/ImageProcessor/ImageProcessorTools/SUSANEdgeDetectionLite.h
• Modules/ImageProcessor/ImageProcessorTools/SUSANEdgeDetectionLite.cpp

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