boofcv.alg.feature.orientation.impl

Class ImplOrientationAverageGradientIntegral<T extends ImageGray,G extends GradientValue>

java.lang.Object

boofcv.alg.feature.orientation.OrientationIntegralBase<T,G>

boofcv.alg.feature.orientation.impl.ImplOrientationAverageGradientIntegral<T,G>

All Implemented Interfaces:

OrientationIntegral<T>, RegionOrientation

public class ImplOrientationAverageGradientIntegral<T extends ImageGray,G extends GradientValue>
extends OrientationIntegralBase<T,G>

Estimates the orientation of a region by computing the image derivative from an integral image. The derivative along each axis is summed up and the angle computed from that.

Constructor Summary

Constructors

Constructor and Description
ImplOrientationAverageGradientIntegral(double radiusToScale, int sampleRadius, double period, int sampleWidth, double weightSigma, java.lang.Class<T> imageType)

Method Summary

Modifier and Type	Method and Description
double	compute(double c_x, double c_y) Computes the orientation of a region about its center.

Methods inherited from class boofcv.alg.feature.orientation.OrientationIntegralBase

getImageType, setImage, setObjectRadius

Methods inherited from class java.lang.Object

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

Constructor Detail

ImplOrientationAverageGradientIntegral

public ImplOrientationAverageGradientIntegral(double radiusToScale,
                                              int sampleRadius,
                                              double period,
                                              int sampleWidth,
                                              double weightSigma,
                                              java.lang.Class<T> imageType)

Parameters:

sampleRadius - Radius of the region being considered in terms of Wavelet samples. Typically 6.

weightSigma - Sigma for weighting distribution. Zero for unweighted.

Method Detail

compute

public double compute(double c_x,
                      double c_y)

Description copied from interface: RegionOrientation

Computes the orientation of a region about its center.

Parameters:

c_x - Center of the region in image pixels.

c_y - Center of the region in image pixels.

Returns:

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