boofcv.alg.feature.detect.intensity.impl

Class ImplSsdCornerBase<D extends ImageGray,D2 extends ImageGray>

java.lang.Object

boofcv.alg.feature.detect.intensity.impl.ImplSsdCornerBase<D,D2>

All Implemented Interfaces:

FeatureIntensity<D>, GradientCornerIntensity<D>

Direct Known Subclasses:

ImplSsdCorner_F32, ImplSsdCorner_S16

public abstract class ImplSsdCornerBase<D extends ImageGray,D2 extends ImageGray>
extends java.lang.Object
implements GradientCornerIntensity<D>

Several corner detector algorithms work by computing a symmetric matrix whose elements are composed of the convolution of the image's gradient squared. This is done for X*X, X*Y, and X*X. Once the matrix has been constructed it is used to estimate how corner like the pixel under consideration is. This class provides a generalized interface for performing these calculations in an optimized manor.

NOTE: Image borders are not processed. The zeros in the image border need to be taken in account when extract features using algorithms such as non-max suppression.

Constructor Summary

Constructors

Constructor and Description
ImplSsdCornerBase(int windowRadius, java.lang.Class<D2> secondDerivType)

Method Summary

Modifier and Type	Method and Description
int	getIgnoreBorder() Size of the region surrounding the image's border in which pixels are not processed.
int	getRadius() Returns the radius of the feature being computed.
void	process(D derivX, D derivY, GrayF32 intensity) Computes feature intensity image.
void	setImageShape(int imageWidth, int imageHeight)

Methods inherited from class java.lang.Object

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

Constructor Detail

ImplSsdCornerBase

public ImplSsdCornerBase(int windowRadius,
                         java.lang.Class<D2> secondDerivType)

Method Detail

setImageShape

public void setImageShape(int imageWidth,
                          int imageHeight)

getRadius

public int getRadius()

Description copied from interface: FeatureIntensity

Returns the radius of the feature being computed. Features are square in shape with a width = 2*radius+1.

Specified by:

getRadius in interface FeatureIntensity<D extends ImageGray>

Returns:

Radius of detected features.

getIgnoreBorder

public int getIgnoreBorder()

Description copied from interface: FeatureIntensity

Size of the region surrounding the image's border in which pixels are not processed.

Specified by:

getIgnoreBorder in interface FeatureIntensity<D extends ImageGray>

Returns:

The ignore border around the image.

process

public void process(D derivX,
                    D derivY,
                    GrayF32 intensity)

Description copied from interface: GradientCornerIntensity

Computes feature intensity image.

Specified by:

process in interface GradientCornerIntensity<D extends ImageGray>

Parameters:

derivX - Image derivative along the x-axis.

derivY - Image derivative along the y-axis.

intensity - Output intensity image