eVision.EHarrisCornerDetector Class Reference

Manages a complete context for the Harris corner detector. More...

Inheritance diagram for eVision.EHarrisCornerDetector:

Collaboration diagram for eVision.EHarrisCornerDetector:

Public Member Functions
	EHarrisCornerDetector ()
	Constructs a EHarrisCornerDetector object initialized to its default values.
void	Apply (eVision.EROIBW8 source, eVision.EHarrisInterestPoints interestPoints)
	Apply the Harris corner detector on an image/ROI.

Properties
float	IntegrationScale [get, set]
	The integration scale.
float	Threshold [get, set]
	Threshold on the cornerness measure for a pixel to be considered as a corner.
bool	SubpixelPrecisionEnabled [get, set]
	Returns whether the sub-pixel interpolation is enabled.
float	DerivationScale [get, set]
	Returns the current derivation scale.
eVision.EHarrisThresholdingMode	ThresholdingMode [get, set]
	Thresholding mode for the cornerness measure.
bool	GradientNormalizationEnabled [get, set]
	Sets whether the gradient is normalized before the computation of the cornerness measure.

Detailed Description

Manages a complete context for the Harris corner detector.

This implementation of the Harris corner detector operates exclusively on a grayscale BW8 images.

License(s): EasyImage

Constructor & Destructor Documentation

EHarrisCornerDetector()

eVision.EHarrisCornerDetector.EHarrisCornerDetector

(

)

Constructs a EHarrisCornerDetector object initialized to its default values.

Member Function Documentation

Apply()

void eVision.EHarrisCornerDetector.Apply	(	eVision.EROIBW8	source,
		eVision.EHarrisInterestPoints	interestPoints )

Apply the Harris corner detector on an image/ROI.

Parameters

source	The source image/ROI.
interestPoints	The container in which to store the interest points.

Property Documentation

DerivationScale

float eVision.EHarrisCornerDetector.DerivationScale

getset

Returns the current derivation scale.

GradientNormalizationEnabled

bool eVision.EHarrisCornerDetector.GradientNormalizationEnabled

getset

Sets whether the gradient is normalized before the computation of the cornerness measure.

If this flag is enabled, the values of the X-gradient and of the Y-gradient are first divided by their maximum absolute value (in the internal computations). This results in a cornerness measure that is roughly distributed around the value 1. If this flag is disabled, the cornerness measure will be much greater.

IntegrationScale

float eVision.EHarrisCornerDetector.IntegrationScale

getset

The integration scale.

The integration scale is the standard deviation of the Gaussian filter that is used for scale analysis.

SubpixelPrecisionEnabled

bool eVision.EHarrisCornerDetector.SubpixelPrecisionEnabled

getset

Returns whether the sub-pixel interpolation is enabled.

Threshold

float eVision.EHarrisCornerDetector.Threshold

getset

Threshold on the cornerness measure for a pixel to be considered as a corner.

If the threshold mode is set to EHarrisThresholdingMode.EHarrisThresholdingMode_Absolute, the threshold value is interpreted as an absolute threshold on the cornerness. In this case, the threshold must be a strictly positive real value.

If the threshold mode is set to EHarrisThresholdingMode.EHarrisThresholdingMode_Relative, the threshold is expressed as a fraction ranging from 0 to 1 of the maximum value of the cornerness of the source image.

ThresholdingMode

eVision.EHarrisThresholdingMode eVision.EHarrisCornerDetector.ThresholdingMode

getset

Thresholding mode for the cornerness measure.