boofcv.alg.feature.orientation

Class OrientationAverage<D extends ImageSingleBand>

java.lang.Object

boofcv.alg.feature.orientation.OrientationAverage<D>

All Implemented Interfaces:

OrientationGradient<D>, RegionOrientation

Direct Known Subclasses:

ImplOrientationAverage_F32, ImplOrientationAverage_S16, ImplOrientationAverage_S32

public abstract class OrientationAverage<D extends ImageSingleBand>
extends Object
implements OrientationGradient<D>

Computes the orientation of a region by summing up the derivative along each axis independently then computing the direction fom the sum. If weighted a Gaussian kernel centered around the targeted pixel is used.

Author:

Peter Abeles

Field Summary

Fields

Modifier and Type	Field and Description
protected D	derivX
protected D	derivY
protected boolean	isWeighted
protected int	radius
protected int	radiusScale
protected ImageRectangle	rect
protected Kernel2D_F32	weights

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	OrientationAverage(boolean weighted)

Method Summary

Methods

Modifier and Type	Method and Description
double	compute(double X, double Y) Computes the orientation of a region about its center.
protected abstract double	computeUnweightedScore() Compute the score without using the optional weights
protected abstract double	computeWeightedScore(int c_x, int c_y) Compute the score using the weighting kernel.
int	getRadius()
Kernel2D_F32	getWeights()
void	setImage(D derivX, D derivY) Specifies input image data for estimating orientation.
void	setRadius(int radius)
void	setScale(double scale) Specifies scale at which the orientation is estimated.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface boofcv.abst.feature.orientation.OrientationGradient

getImageType

Field Detail

derivX

protected D extends ImageSingleBand derivX

derivY

protected D extends ImageSingleBand derivY

rect

protected ImageRectangle rect

radius

protected int radius

radiusScale

protected int radiusScale

isWeighted

protected boolean isWeighted

weights

protected Kernel2D_F32 weights

Constructor Detail

OrientationAverage

protected OrientationAverage(boolean weighted)

Method Detail

getRadius

public int getRadius()

setRadius

public void setRadius(int radius)

getWeights

public Kernel2D_F32 getWeights()

setScale

public void setScale(double scale)

Description copied from interface: RegionOrientation

Specifies scale at which the orientation is estimated.

Specified by:

setScale in interface RegionOrientation

Parameters:

scale - Scale of the orientation region.

setImage

public void setImage(D derivX,
            D derivY)

Description copied from interface: OrientationGradient

Specifies input image data for estimating orientation.

Specified by:

setImage in interface OrientationGradient<D extends ImageSingleBand>

Parameters:

derivX - Image derivative along x-axis.

derivY - Image derivative along y-axis.

compute

public double compute(double X,
             double Y)

Description copied from interface: RegionOrientation

Computes the orientation of a region about its center.

Specified by:

compute in interface RegionOrientation

Parameters:

X - Center of the region in image pixels.

Y - Center of the region in image pixels.

Returns:

Orientation in radians. Angle zero points along x-axis and pi/2 along y-axis.

computeUnweightedScore

protected abstract double computeUnweightedScore()

Compute the score without using the optional weights

computeWeightedScore

protected abstract double computeWeightedScore(int c_x,
                          int c_y)

Compute the score using the weighting kernel.