zxhEdgeCannyT< PixelType > Class Template Reference

zxhEdgeCanny.cpp return canny edge contour points image, no gaussian filter is applied here More...

#include <zxhEdgeCanny.h>

Inheritance diagram for zxhEdgeCannyT< PixelType >:

List of all members.

Public Member Functions
virtual bool	Evaluate ()
bool	EvaluateCannyImage ()
zxhImageDataT< float > *	GetCannyImage ()
bool	RemoveSmallConnectRegions (float fFraction=0.01)
void	SetThreshold (float low, float high)
void	GetThreshold (float &low, float &high)
Protected Member Functions
bool	ThresholdEdgePoint ()
	2) Threshold and searching edge point candidates
bool	Hysteresis ()
	3) Hysteresis
Protected Attributes
zxhImageDataT< float >	m_CannyImage
zxhImageData	m_imgResampleImage
zxhImageDataT< float >	m_imgResampleImageGradientMag
float	m_Threshold [2]

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Detailed Description

template<class PixelType = PixelTypeDefault>
class zxhEdgeCannyT< PixelType >

zxhEdgeCanny.cpp return canny edge contour points image, no gaussian filter is applied here

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Member Function Documentation

template<class PixelType >

bool zxhEdgeCannyT< PixelType >::Evaluate

(

)

[virtual]

run algorithm to compute the edge image, return whether success 1) compute differentiate 2) Threshold 3)hysteresis

run algorithm to compute the edge image, return whether success 1) compute differentiate=EvaluateCannyImage 2) Threshold 3)hysteresis

Implements zxhEdgeBaseT< PixelType >.

Reimplemented in zxhMultiCannyEdge.

template<class PixelType >

bool zxhEdgeCannyT< PixelType >::EvaluateCannyImage

(

)

1) only compute differentiate c(x,y,z) = [fxx * fx^2 + fyy * fy^2 + fzz * fz^2 + 2( fx*fy*fxy + fx*fz*fxz + fy*fz*fyz )]/(fx^2 + fy^2 + fz^2);

1) compute differentiate c(x,y,z) = [fxx * fx^2 + fyy * fy^2 + fzz * fz^2 + 2( fx*fy*fxy + fx*fz*fxz + fy*fz*fyz )]/(fx^2 + fy^2 + fz^2);

template<class PixelType >

bool zxhEdgeCannyT< PixelType >::Hysteresis

(

)

[protected]

3) Hysteresis

3) Hysteresis change -1 and -3 into Foreground and -2 and 0 into background

template<class PixelType = PixelTypeDefault>

bool zxhEdgeCannyT< PixelType >::RemoveSmallConnectRegions

(

float

fFraction = 0.01

)

remove small regions if the region's connected pixels is smaller than fFraction of total region pixels then remove them

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Member Data Documentation

template<class PixelType = PixelTypeDefault>

zxhImageDataT<float> zxhEdgeCannyT< PixelType >::m_CannyImage [protected]

store the second order canny image c(x,y,z) = [fxx * fx^2 + fyy * fy^2 + fzz * fz^2 + 2( fx*fy*fxy + fx*fz*fxz + fy*fz*fyz )]/(fx^2 + fy^2 + fz^2);

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

• zxhEdgeCanny.h