boofcv.alg.feature.detect.extract

Class NonMaxBlock

java.lang.Object

boofcv.alg.feature.detect.extract.NonMaxBlock

Direct Known Subclasses:

NonMaxBlockRelaxed, NonMaxBlockStrict

public abstract class NonMaxBlock
extends java.lang.Object

Non-maximum extractor based on the block algorithm in [1]. The worst case complexity per pixel is 4 - 4/(n+1) where n is the region size. The algorithm works by breaking up the image into a set of evenly spaced blocks with their sides touching. The local maximum is found inside a block and then the region around that maximum is examined to see if it is truly a local max.

Each block check is independent of all the others and no information is exchanged. This algorithm could be paralyzed easily and has no memory overhead.

See NonMaxSuppression for a definition of parameters not described in this document

[1] Neubeck, A. and Van Gool, L. "Efficient non-maximum suppression" ICPR 2006

Field Summary

Fields

Modifier and Type	Field and Description
boolean	detectsMaximum
boolean	detectsMinimum

Method Summary

Modifier and Type	Method and Description
int	getBorder()
int	getSearchRadius()
float	getThresholdMax()
float	getThresholdMin()
void	process(GrayF32 intensityImage, QueueCorner localMin, QueueCorner localMax) Detects local minimums and/or maximums in the provided intensity image.
void	setBorder(int border)
void	setSearchRadius(int radius)
void	setThresholdMax(float thresholdMax)
void	setThresholdMin(float thresholdMin)

Methods inherited from class java.lang.Object

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

Field Detail

detectsMinimum

public boolean detectsMinimum

detectsMaximum

public boolean detectsMaximum

Method Detail

process

public void process(GrayF32 intensityImage,
                    QueueCorner localMin,
                    QueueCorner localMax)

Detects local minimums and/or maximums in the provided intensity image.

Parameters:

intensityImage - (Input) Feature intensity image.

localMin - (Output) storage for found local minimums.

localMax - (Output) storage for found local maximums.

setSearchRadius

public void setSearchRadius(int radius)

getBorder

public int getBorder()

setBorder

public void setBorder(int border)

getSearchRadius

public int getSearchRadius()

getThresholdMin

public float getThresholdMin()

setThresholdMin

public void setThresholdMin(float thresholdMin)

getThresholdMax

public float getThresholdMax()

setThresholdMax

public void setThresholdMax(float thresholdMax)