boofcv.alg.feature.detect.peak

Class MeanShiftPeak<T extends boofcv.struct.image.ImageSingleBand>

java.lang.Object

boofcv.alg.feature.detect.peak.MeanShiftPeak<T>

public class MeanShiftPeak<T extends boofcv.struct.image.ImageSingleBand>
extends java.lang.Object

Simple implementations of mean-shift intended to finding local peaks inside an intensity image. Implementations differ in how they weigh each point. In each iterations the mean of the square sample region centered around the target is computed and the center shifted so that location. It stops when change is less than a delta or the maximum number of iterations has been exceeded. If the image border is hit while searching the square will be push back until it is entirely contained inside the image.

Field Summary

Fields

Modifier and Type	Field and Description
protected float	convergenceTol
protected T	image
protected boofcv.alg.interpolate.InterpolatePixelS<T>	interpolate
protected int	maxIterations
protected float	peakX
protected float	peakY
protected int	radius
protected boofcv.alg.weights.WeightPixel_F32	weights
protected int	width
protected float	x0
protected float	y0

Constructor Summary

Constructors

Constructor and Description
MeanShiftPeak(int maxIterations, float convergenceTol, boofcv.alg.weights.WeightPixel_F32 weights, java.lang.Class<T> imageType) Configures search.

Method Summary

Methods

Modifier and Type	Method and Description
float	getPeakX()
float	getPeakY()
void	search(float cx, float cy) Performs a mean-shift search center at the specified coordinates
void	setImage(T image) Specifies the input image
void	setRadius(int radius)
protected void	setRegion(float cx, float cy) Updates the location of the rectangular bounding box

Methods inherited from class java.lang.Object

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

Field Detail

image

protected T extends boofcv.struct.image.ImageSingleBand image

interpolate

protected boofcv.alg.interpolate.InterpolatePixelS<T extends boofcv.struct.image.ImageSingleBand> interpolate

maxIterations

protected int maxIterations

radius

protected int radius

width

protected int width

convergenceTol

protected float convergenceTol

peakX

protected float peakX

peakY

protected float peakY

x0

protected float x0

y0

protected float y0

weights

protected boofcv.alg.weights.WeightPixel_F32 weights

Constructor Detail

MeanShiftPeak

public MeanShiftPeak(int maxIterations,
             float convergenceTol,
             boofcv.alg.weights.WeightPixel_F32 weights,
             java.lang.Class<T> imageType)

Configures search.

Parameters:

maxIterations - Maximum number of iterations. Try 10

convergenceTol - Convergence tolerance. Try 1e-3

weights - Used to compute the weight each pixel contributes to the mean. Try a uniform distribution.

Method Detail

setImage

public void setImage(T image)

Specifies the input image

Parameters:

image - input image

setRadius

public void setRadius(int radius)

search

public void search(float cx,
          float cy)

Performs a mean-shift search center at the specified coordinates

setRegion

protected void setRegion(float cx,
             float cy)

Updates the location of the rectangular bounding box

Parameters:

cx - Image center x-axis

cy - Image center y-axis

getPeakX

public float getPeakX()

getPeakY

public float getPeakY()